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Research on seismic performance of shear walls with concrete filled steel tube columns and concealed steel trusses 被引量:3
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作者 Cao Wanlin Zhang Jianwei +1 位作者 Dong Hongying Wang Min 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2011年第4期535-546,共12页
In order to further improve the seismic performance of RC shear walls, a new composite shear wall with concrete filled steel tube (CFT) columns and concealed steel trusses is proposed. This new shear wall is a doubl... In order to further improve the seismic performance of RC shear walls, a new composite shear wall with concrete filled steel tube (CFT) columns and concealed steel trusses is proposed. This new shear wall is a double composite shear wall; the first composite being the use of three different force systems, CFT, steel truss and shear wall, and the second the use of two different materials, steel and concrete. Three 1/5 scaled experimental specimens: a traditional RC shear wall, a shear wall with CFT columns, and a shear wall with CFT columns and concealed steel trusses, were tested under cyclic loading and the seismic performance indices of the shear walls were comparatively analyzed. Based on the data from these experiments, a thorough elastic-plastic finite element analysis and parametric analysis of the new shear walls were carried out using ABAQUS software. The finite element results of deformation, stress distribution, and the evolution of cracks in each phase were compared with the experimental results and showed good agreement. A mechanical model was also established for calculating the load-carrying capacity of the new composite shear walls. The results show that this new type of shear wall has improved seismic performance over the other two types of shear wails tested. 展开更多
关键词 shear wall concrete filled steel tube (CFT) concealed steel truss seismic performance experimental research
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Damage assessment for seismic response of recycled concrete filled steel tube columns 被引量:4
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作者 Huang Yijie Xiao Jianzhuang Shen Luming 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2016年第3期607-616,共10页
A model for evaluating structural damage of recycled aggregate concrete filled steel tube (RCFST) columns under seismic effects is proposed in this paper. The proposed model takes the lateral deformation and the eff... A model for evaluating structural damage of recycled aggregate concrete filled steel tube (RCFST) columns under seismic effects is proposed in this paper. The proposed model takes the lateral deformation and the effect of repeated cyclic loading into account. Available test results were collected and utilized to calibrate the parameters of the proposed model. A seismic test for six RCFST columns was also performed to validate the proposed damage assessment model. The main test parameters were the recycled coarse aggregate (RCA) replacement percentage and the bond-slip property. The test results indicated that the seismic performance of the RCFST member depends on the RCA contents and their damage index increases as the RCA replacement percentage increases. It is also indicated that the damage degree of RCFST changes with the variation of the RCA replacement percentage. Finally, comparisons between the RCA contents, lateral deformation ratio and damage degree were implemented. It is suggested that an improvement procedure should be implemented in order to compensate for the performance difference between the RCFST and normal concrete filled steel tubes (CFST). 展开更多
关键词 recycled aggregate concrete (RAC) recycled concrete filled steel tube (RCFST) COLUMN seismicperformance damage assessment model (DAM)
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Seismic performance of recycled concrete-filled square steel tube columns 被引量:9
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作者 Chen Zongping Jing Chenggui +1 位作者 Xu Jinjun Zhang Xianggang 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2017年第1期119-130,共12页
An experimental study on the seismic performance of recycled concrete-filled square steel tube (RCFST) columns is carried out. Six specimens were designed and tested under constant axial compression and cyclic later... An experimental study on the seismic performance of recycled concrete-filled square steel tube (RCFST) columns is carried out. Six specimens were designed and tested under constant axial compression and cyclic lateral loading. Two parameters, replacement percentage of recycled coarse aggregate (RCA) and axial compression level, were considered in the test. Based on the experimental data, the hysteretic loops, skeleton curves, ductility, energy dissipation capacity and stiffness degradation of RCFST columns were analyzed. The test results indicate that the failure modes of RCFST columns are the local buckling of the steel tube at the bottom of the columns, and the hysteretic loops are full and their shapes are similar to normal CFST columns. Furthermore, the ductility coefficient of all specimens are close to 3.0, and the equivalent viscous damping coefficient corresponding to the ultimate lateral load ranges from 0.323 to 0.360, which demonstrates that RCFST columns exhibit remarkable seismic performance. 展开更多
关键词 recycled concrete-filled square steel tube (RCFST) COLUMN replacement percentage cyclic loading seismicperformance
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Bearing capacity of composite columns reinforced by concrete filled steel tube 被引量:1
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作者 韦建刚 ZHU Pu CHEN Bao-chun 《Journal of Chongqing University》 CAS 2013年第1期27-34,共8页
In this study, nine simplified short composite columns consisting of core CFST (concrete filled steel tube) of different diameters and outer reinforced concrete were constructed to study their compressive performance ... In this study, nine simplified short composite columns consisting of core CFST (concrete filled steel tube) of different diameters and outer reinforced concrete were constructed to study their compressive performance under axial or eccentric compression. The failure mode is characterized by the crush of the outer concrete. The bearing capacity increases at first and then decreases with further increase of the position coefficient. It can be concluded that position coefficient is an important structural parameter that has considerable influences on the ultimate bearing capacity of the composite columns. The outer concrete, steel tubes and longitudinal reinforcement are found to work in a cooperative manner under axial or eccentric compression when the position coefficient is about 0.5. An improved bearing capacity algorithm that takes the position coefficient into account has been proposed based on the experimental and simulation results and current technical specification in China. It has been proven to be precise and safe. 展开更多
关键词 concrete filled steel tube composite column position factor TEST FORMULA
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Effect of contact thermal resistance on temperature distributions of concrete-filled steel tubes in fire 被引量:5
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作者 吕学涛 杨华 张素梅 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2011年第1期81-88,共8页
To predicate the temperature distribution of concrete-filled steel tubes(CFSTs) being exposure to fire,a finite element analysis model was developed using a finite element package,ANSYS.A suggested value of contact th... To predicate the temperature distribution of concrete-filled steel tubes(CFSTs) being exposure to fire,a finite element analysis model was developed using a finite element package,ANSYS.A suggested value of contact thermal resistance was therefore proposed with the supporting of massive numbers of collected test data.Parametric analysis was conducted subsequently towards the cross-sectional temperature distribution of CFST columns in four-side fire,in which the exposure time,width of the cross section,steel ratio were taken into account with considering contact thermal resistance.It was found that contact thermal resistance has little effect on the overall temperature regulation with the exposure time,the width of cross-section or the change of steel ratio.However,great temperature dropping at the concrete adjacent to the contact interface,and gentle temperature increase at steel tube,exist if considering contact thermal resistance.The results of the study are expected to provide theoretical basis for the fire resistance behavior and design of the CFST columns being exposure to fire. 展开更多
关键词 contact thermal resistance temperature distribution concrete-filled steel tube heal transfer
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Three-dimensional nonlinear analysis of creep in concrete filled steel tube columns 被引量:1
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作者 程晓东 李广宇 叶贵如 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第8期826-835,共10页
This paper proposes a based on 3D-VLE (three-dimensional nonlinear viscoelastic theory) three-parameters viscoelastic model for studying the time-dependent behaviour of concrete filled steel tube (CFT) columns. Th... This paper proposes a based on 3D-VLE (three-dimensional nonlinear viscoelastic theory) three-parameters viscoelastic model for studying the time-dependent behaviour of concrete filled steel tube (CFT) columns. The method of 3D-VLE was developed to analyze the effects of concrete creep behavior on CFT structures. After the evaluation of the parameters in the proposed creep model, experimental measurements of two prestressed reinforced concrete beams were used to investigate the creep phenomenon of three CFT columns under long-term axial and eccentric load was investigated. The experimentally obtained time-dependent creep behaviour accorded well with the cu~'es obtained from the proposed method. Many factors (such as ratio of long-term load to strength, slenderness ratio, steel ratio, and eccentricity ratio) were considered to obtain the regularity of influence of concrete creep on CFT structures. The analytical results can be consulted in the engineering practice and design. 展开更多
关键词 Three-dimensional virtual laminated element (3D-VLE) Creep analysis Three-dimensional viscoelastic theory Three-parameters viscoelastic model concrete filled steel tube columns
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Quantifying Creep of Concrete Filled Steel Tubes 被引量:1
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作者 陈宝春 SHRESTHA K M 《Journal of Donghua University(English Edition)》 EI CAS 2010年第6期796-805,共10页
Using age adjusted effective modulus(AAEM)method,creep of concrete filled steel tube(CFST)member was formulated considering of creep coefficient and aging coefficient.Ten CFST specimens were tested including eight for... Using age adjusted effective modulus(AAEM)method,creep of concrete filled steel tube(CFST)member was formulated considering of creep coefficient and aging coefficient.Ten CFST specimens were tested including eight for creep and two for shrinkage.The experimental result was compared with the computed result using AAEM in which the creep coefficient was taken from calibration of ACI model based on experimental result on sealed concrete,and aging coefficient was supplied from relaxation test on sealed concrete specimen.Furthermore,the creep of CFST member was analyzed using author's own subroutine to input concrete properties through user programmable feature(UPF)in ANSYS software.Comparison was made on authors' own experimental database,some existing experimental results,and results from AAEM and numerical analysis.Finally,the conditions of applicability of AAEM method are put forward,and numerical approach to compute creep of CFST specimen is delineated. 展开更多
关键词 age adjusted effective modulus(AAEM) concrete filled steel tube(CFST) creep test user programmable feature(UPF) subroutine numerical analysis
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Concrete-Filled Steel Tube Arch Bridges in China 被引量:70
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作者 Jielian Zheng Jianjun wang 《Engineering》 2018年第1期143-155,共13页
In the past 20 years, great progress has been achieved in China in the construction of concrete-filled steel tube (CFST) arch bridges and concrete arch bridges with a CFST skeleton. The span of these bridges has bee... In the past 20 years, great progress has been achieved in China in the construction of concrete-filled steel tube (CFST) arch bridges and concrete arch bridges with a CFST skeleton. The span of these bridges has been increasing rapidly, which is rare in the history of bridge development. The large-scale construction of expressways and high-speed railways demands the development of long-span arch bridges, and advances in design and construction techniques have made it possible to construct such bridges. In the present study, the current status, development, and major innovative technologies of CFST arch bridges and concrete arch bridges with a CFST skeleton in China are elaborated. This paper covers the key con- struction technologies of CFST arch bridges, such as the design, manufacture, and installation of steel tube arch trusses, the preparation and pouring of in-tube concrete, and the construction of the world's longest CFST arch bridge-the First Hejiang Yangtze River Bridge. The main construction technologies of rein- forced concrete arch bridges are also presented, which include cable-stayed fastening-hanging cantilever assembly, adjusting the load by means of stay cables, surrounding the concrete for arch rib pouring, and so forth. In addition, the construction of two CFST skeleton concrete arch bridges-the Guangxi Yongning Yong River Bridge and the Yunnan-Guangxi Railway Nanpan River Bridge--is discussed. CFST arch bridges in China have already gained a world-leading position; with the continuous innovation of key technologies, China will become the new leader in promoting the development of arch bridges. 展开更多
关键词 concrete-filled steel tube (CFST) ARCH BRIDGE steel-reinforced concrete ARCH BRIDGE CABLE-STAYED fastening-hanging cantileverassembly VACUUM-ASSISTED pouring in-tube concrete Adjusting load by stay cables
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Performance Investigation of Square Concrete-filled Steel Tube Columns
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作者 陈兵 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第4期730-736,共7页
The behaviour of square concrete-filled steel tube columns under concentrical loading was studied. More than one hundred specimens were tested to investigate the effects of thickness of steel tube on the load carrying... The behaviour of square concrete-filled steel tube columns under concentrical loading was studied. More than one hundred specimens were tested to investigate the effects of thickness of steel tube on the load carrying capacity of the concrete-filled tubular columns (CFTs). The effect of the grade of concrete and content of expansive agent were also investigated. The effect of these parameters on the confinement of the concrete core was studied as well. From the experimental study it was found that for both CFTs with different strength grade concrete core, the ultimate load carrying capacity increases with the increase in percentage of expansive agent up to 20% but it again decreases at 25% of expansive agent content. It was also shown that the failure mode of CFTs depends on the strength grade of concrete core. 展开更多
关键词 concrete filled steel tubes concrete COLUMNS ultimate capacity expansive agent
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Reliability analysis of circular concrete-filled steel tube with material and geometrical nonlinearity 被引量:1
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作者 Tengfei XU Tianyu XIANG +1 位作者 Yulin ZHAN Renda ZHAO 《Journal of Modern Transportation》 2012年第3期138-147,共10页
Most of the previous research on concrete-filled steel tube is restricted to a deterministic approach. To gain clear insight into the random properties of circular concrete-filled steel tube, reliability analysis is c... Most of the previous research on concrete-filled steel tube is restricted to a deterministic approach. To gain clear insight into the random properties of circular concrete-filled steel tube, reliability analysis is carried out in the present study. To obtain the Structural nonlinear response and ultimate resistance capacity, material and geometrical nonlinear analysis of circular concrete-filled steel tube is performed with a three-dimensional degenerated beam ele- ment. Then we investigate the reliability of concrete-filled steel tube using the first-order reliability method combined with nonlinear finite element analysis. The influences of such parameters as material strength, slenderness, initial geo- metrical imperfection, etc. on the reliability of circular concrete-filled steel tube column are studied. It can be con- cluded that inevitable random fluctuation of those parameters has significant influence on structural reliability, and that stochastic or reliability methods can provide a more rational and subjective evaluation on the safety of CFT structures than a deterministic approach. 展开更多
关键词 concrete-filled steel tube RELIABILITY material nonlinearity geometrical nonlinearity
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Application of Large-diameter and Long-span Micro-expansive Pumping Concrete Filled Steel Tube Arch Bridge
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作者 丁庆军 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2001年第4期73-76,共4页
In this article the high strength micro-expansive concrete that has been applied on big-diameter and long-span steel arch bridge is researched. The applications show that the concrete has some merits, such as good flu... In this article the high strength micro-expansive concrete that has been applied on big-diameter and long-span steel arch bridge is researched. The applications show that the concrete has some merits, such as good fluidity, low bleeding ratio and no segregation, low slump loss, high early strength and high later strength, micro-expansion etc. 展开更多
关键词 concrete filled steel tube (CFST) PUMPING workability properties CONSTRUCTION
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THE SHRINKAGE OF EXPANSIVE CONCRETE FILLED STEEL TUBE AND ITS IMPROVEMENT METHOD
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作者 Li, Y Hu, SG +2 位作者 Ding, QJ Zhou, MK Zhang, YS 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1999年第1期46-51,共6页
The shrinkage characteristics tics of expansive concrete filled steel tube (CFST) are analyzed, Cold shrinkage, creep and autogenous shrinkage are considered as the main reasons of causing CFST contraction. In accorda... The shrinkage characteristics tics of expansive concrete filled steel tube (CFST) are analyzed, Cold shrinkage, creep and autogenous shrinkage are considered as the main reasons of causing CFST contraction. In accordance with the shrinkage characteristics of expansive CFST, a kind of energy-stored delayed expansive agent is exploited, which can not only compensate the shrinkage of the core concrete in every stages, but also make CFST expand according to the delayed expansion mechanism. As the result, the prestress loss weill be reduced and expansive energy will be utilized effectively. 展开更多
关键词 concrete filled steel tube shrinkage mechanism expansive agent expansive model
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Prediction of Axial Capacity of Concrete-Filled Square Steel Tubes Using Neural Networks
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作者 朱美春 王清湘 冯秀峰 《Journal of Southwest Jiaotong University(English Edition)》 2005年第2期151-155,共5页
The application of artificial neural network to predict the ultimate bearing capacity of CFST ( concrete-filled square steel tubes) short columns under axial loading is explored. Input parameters consiste of concret... The application of artificial neural network to predict the ultimate bearing capacity of CFST ( concrete-filled square steel tubes) short columns under axial loading is explored. Input parameters consiste of concrete compressive strength, yield strength of steel tube, confinement index, sectional dimension and width-to-thickness ratio. The ultimate bearing capacity is the only output parameter. A multilayer feedforward neural network is used to describe the nonlinear relationships between the input and output variables. Fifty-five experimental data of CFST short columns under axial loading are used to train and test the neural network. A comparison between the neural network model and three parameter models shows that the neural network model possesses good accuracy and could be a practical method for predicting the ultimate strength of axially loaded CFST short columns. 展开更多
关键词 concrete-filled square steel tubes Neural networks Axial capacity Short columns
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Seismic behavior of concrete filled steel tubular arch structures 被引量:4
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作者 熊峰 Sashi K Kunnath 刘浩吾 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2005年第1期107-115,共9页
Shaking table tests of a 1:10 scale arch model performed to investigate the seismic behavior and resistance of concrete filled steel tubular (CFT) arch structures are described in this paper. The El-Centro record and ... Shaking table tests of a 1:10 scale arch model performed to investigate the seismic behavior and resistance of concrete filled steel tubular (CFT) arch structures are described in this paper. The El-Centro record and Shanghai artificial wave were adopted as the input excitation. The entire test process can be divided into three stages depending on the lateral brace configurations, i.e., fully (five) braced, two braces removed, and all braces removed. A total of 46 tests, starting from the elastic state to failure condition, have been conducted. The natural vibration frequencies, responses of acceleration, displacement and strain were measured. From the test results, it is demonstrated that the CFT arch structures are capable of resisting severe ground motions and that CFT arches offer a credible alternative to reinforced concrete arches, especially in regions of high seismic intensity. 展开更多
关键词 concrete filled steel tube arch structures shaking table test seismic behavior lateral braces
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Axial Bearing Capacity of Short FRP Confined Concrete-filled Steel Tubular Columns 被引量:7
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作者 刘兰 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第3期454-458,共5页
The bearing capacity of FRP confined concrete-filled steel tubular (FRP-CFST) columns under axial compression was investigated. This new type of composite column is a concrete-filled steel tube (CFST) confined wit... The bearing capacity of FRP confined concrete-filled steel tubular (FRP-CFST) columns under axial compression was investigated. This new type of composite column is a concrete-filled steel tube (CFST) confined with fiber-reinforced polymer (FRP) wraps. Totally 11 short column specimens were tested to failure under axial compression. The influences of the type and quantity of FRP, the thickness of steel tube and the concrete strength were studied. It was found that the bearing capacity of short FRP-CFST column was much higher than that of comparable CFST column. Furthermore, the formulas for calculating the bearing capacity of the FRP-CFST columns are proposed. The analytical calculated results agree well with the experimental results. 展开更多
关键词 COLUMNS concrete-filled steel tubes (CFST) fiber reinforced polymer (FRP) CONFINEMENT bearing capacity.
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Research on stress concentration at tubular joints in concrete filled steel tubular truss arch bridge 被引量:1
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作者 LI Rui YE Liao-yuan CHEN Ying 《Journal of Civil Engineering and Architecture》 2009年第3期11-15,共5页
In this paper stresses at joints forming by hollow steel tube and concrete filled steel tube (CFST) are calculated, analyzed and compared. It is founded that the stress concentration at joints of CFST is a quite dif... In this paper stresses at joints forming by hollow steel tube and concrete filled steel tube (CFST) are calculated, analyzed and compared. It is founded that the stress concentration at joints of CFST is a quite different from that of hollow steel tube. A conclusion can be made that analysis of fatigue at the joints of CFST truss arch bridge can not apply the results developed from analyzing at joints of hollow steel tube in marine structure. 展开更多
关键词 concrete filled steel tube (CFST) JOINT stress concentration
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Behaviour of concrete filled steel tubular columns under fire
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作者 查晓雄 钟善桐 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2002年第3期292-296,共5页
A three dimensional nonlinear FE program is used to calculate the fire resistances of concrete filled steel tubular columns under fire. The temperature distributions in the circular section fire are decided by solving... A three dimensional nonlinear FE program is used to calculate the fire resistances of concrete filled steel tubular columns under fire. The temperature distributions in the circular section fire are decided by solving the Fourier Transfer Equation ,and the mechanical behaviour and failure of concrete filled steel tubular columns under fire are thus investigated, and the effects of several parameters on the fire resistance are analysed. The results obtained are in good agreement with the Eurocode. 展开更多
关键词 concrete filled steel tube FIRE RESISTANCE FEA
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Expansive Performance of Self-stressing and Self-compacting Concrete Confined with Steel Tube
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作者 徐磊 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第2期341-345,共5页
Combining with the technology of self-compacting concrete, self-stressing concrete and concrete-filled steel tube, we can get self-compacting and self-stressing concrete-filled steel tube. In order to study the expans... Combining with the technology of self-compacting concrete, self-stressing concrete and concrete-filled steel tube, we can get self-compacting and self-stressing concrete-filled steel tube. In order to study the expansive mechanism of self-stressing concrete, the continuous observation of 47 days on six specimens was carried on. The specimens have different steel area to concrete area ratio. The expansive process in hoop and axial direction were studied, and the expansive mechanism was discussed too. The experimental results identify that the creep and elastic deformation take a large proportion in effective free expansion. The calculating formulas of self-stress in hoop and axial directions were presented here. 展开更多
关键词 self-compacting concrete self-stressing concrete concrete-filled steel tube restrained ex- pansion free expansion CREEP
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Analysis and seismic tests of composite shear walls with CFST columns and steel plate deep beams 被引量:1
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作者 Dong Hongying Cao Wanlin +2 位作者 Wu Haipeng Zhang Jianwei Xu Fangfang 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2013年第4期609-624,共16页
A composite shear wall concept based on concrete filled steel tube (CFST) columns and steel plate (SP) deep beams is proposed and examined in this study. The new wall is composed of three different energy dissipat... A composite shear wall concept based on concrete filled steel tube (CFST) columns and steel plate (SP) deep beams is proposed and examined in this study. The new wall is composed of three different energy dissipation elements: CFST columns; SP deep beams; and reinforced concrete (RC) strips. The RC strips are intended to allow the core structural elements - the CFST columns and SP deep beams - to work as a single structure to consume energy. Six specimens of different configurations were tested under cyclic loading. The resulting data are analyzed herein. In addition, numerical simulations of the stress and damage processes for each specimen were carried out, and simulations were completed for a range of location and span-height ratio variations for the SP beams. The simulations show good agreement with the test results. The core structure exhibits a ductile yielding mechanism characteristic of strong column-weak beam structures, hysteretic curves are plump and the composite shear wall exhibits several seismic defense lines. The deformation of the shear wall specimens with encased CFST column and SP deep beam design appears to be closer to that of entire shear walls. Establishing optimal design parameters for the configuration of SP deep beams is pivotal to the best seismic behavior of the wall. The new composite shear wall is therefore suitable for use in the seismic design of building structures. 展开更多
关键词 concrete filled steel tube (CFST) column steel plate (SP) deep beam composite shear wall seismic test calculation and analysis
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瓮马铁路乌江特大桥设计关键技术研究 被引量:1
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作者 王小飞 张杰 +2 位作者 王新国 周继 罗春林 《铁道标准设计》 北大核心 2024年第3期91-98,共8页
新建瓮马铁路乌江特大桥跨越两山之间深谷,地形复杂、设计难度大。为研究该桥梁方案,首先阐述了主桥的方案构思和结构设计,然后通过空间有限元软件对本桥进行静、动力仿真分析,总结了大跨铁路劲性骨架混凝土拱桥构造和受力特性。结果表... 新建瓮马铁路乌江特大桥跨越两山之间深谷,地形复杂、设计难度大。为研究该桥梁方案,首先阐述了主桥的方案构思和结构设计,然后通过空间有限元软件对本桥进行静、动力仿真分析,总结了大跨铁路劲性骨架混凝土拱桥构造和受力特性。结果表明:主跨337 m上承式劲性骨架混凝土拱桥具有刚度大、徐变小、后期养护维修工作量小等优点,主拱圈采用小矢跨比设计,兼顾安全、经济、环保和美观,能够满足铁路桥梁跨越山区“V”形峡谷的要求;主拱圈由劲性钢管混凝土骨架外包C55无收缩混凝土构成,通过分层分段浇筑方案改善拱圈各构件的内力;拱上结合梁采用两片工字形钢与混凝土桥面板相结合的形式,钢梁栓焊结合,便于制造、运输和施工;拱座采用梯形断面扩大基础,基础开挖永临结合,有效降低施工风险;数值分析表明该桥结构的刚度、强度、稳定性均能满足规范要求,能够满足客货共线铁路的安全性和乘坐舒适性要求。可为其他山区铁路桥梁桥式研究提供参考。 展开更多
关键词 山区铁路 铁路桥 钢管混凝土劲性骨架拱桥 数值计算 设计
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