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Seismic Behavior of Specially Shaped Column Joints with X-Shaped Reinforcement 被引量:3
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作者 戎贤 张健新 李艳艳 《Transactions of Tianjin University》 EI CAS 2013年第2期110-117,共8页
To investigate the seismic behavior of specially shaped column joints with X-shaped reinforcement,two groups of specimens with or without X-shaped reinforcement in joint core region were tested under constant axial co... To investigate the seismic behavior of specially shaped column joints with X-shaped reinforcement,two groups of specimens with or without X-shaped reinforcement in joint core region were tested under constant axial compression load and low reversed cyclic loading,which imitated low to moderate earthquake force.The seismic behavior of specially shaped column joints with X-shaped reinforcement in terms of bearing capacity,displacement,ductility,hysteretic curve,stiffness degradation and energy dissipation was studied and compared to that without Xshaped reinforcement in joint core region.With the damage estimation model,the accumulated damage was analyzed.The shearing capacity formula of specially shaped column joints reinforced by X-shaped reinforcement was proposed with a simple form.The test results show that X-shaped reinforcement is an effective measure for improving the seismic behavior of specially shaped column joints including deformation behavior,ductility and hysteretic characteristic.All specimens were damaged with gradual stiffness degeneration.In addition,X-shaped reinforcement in the joint core region is an effective way to lighten the degree of cumulated damage.The good seismic performance obtained from the specially shaped column joint with X-shaped reinforcement can be used in engineering applications.The test value is higher than the calculated value,which indicates that the formula is safe for the design of specially shaped column joints. 展开更多
关键词 specially shaped column joint low cyclic loading X-shaped reinforcement seismic behavior
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基于CTM和Beam-Column Joint Element的梁柱节点核心区抗剪仿真
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作者 唐智强 黄世涛 马健 《土木工程与管理学报》 北大核心 2020年第3期116-122,共7页
为研究基于CTM和Beam-Column Joint Element单元的钢筋混凝土梁柱节点核心区抗震仿真计算,本文先分析了CTM的计算原理和局限性,并对原计算模型进行调整;之后通过试验数据验证了调整前后模型的正确性,并通过参数分析得出调整前后CTM在不... 为研究基于CTM和Beam-Column Joint Element单元的钢筋混凝土梁柱节点核心区抗震仿真计算,本文先分析了CTM的计算原理和局限性,并对原计算模型进行调整;之后通过试验数据验证了调整前后模型的正确性,并通过参数分析得出调整前后CTM在不同参数下核心区抗剪强度的变化规律;最后通过对比理论计算与试验下核心区抗剪强度变化规律,证明调整后模型更为准确。 展开更多
关键词 钢筋混凝土梁柱节点 CTM 梁柱节点单元 OPENSEES
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Pushover analysis of reinforced concrete frames considering shear failure at beam-column joints 被引量:4
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作者 Y.C.Sung T.K.Lin +1 位作者 C.C.Hsiao M.C.Lai 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2013年第3期373-383,共11页
Since most current seismic capacity evaluations of reinforced concrete (RC) frame structures are implemented by either static pushover analysis (PA) or dynamic time history analysis, with diverse settings of the p... Since most current seismic capacity evaluations of reinforced concrete (RC) frame structures are implemented by either static pushover analysis (PA) or dynamic time history analysis, with diverse settings of the plastic hinges (PHs) on such main structural components as columns, beams and walls, the complex behavior of shear failure at beam-column joints (BCJs) during major earthquakes is commonly neglected. This study proposes new nonlinear PA procedures that consider shear failure at BCJs and seek to assess the actual damage to RC structures. Based on the specifications of FEMA-356, a simplified joint model composed of two nonlinear cross struts placed diagonally over the location of the plastic hinge is established, allowing a sophisticated PA to be performed. To verify the validity of this method, the analytical results for the capacity curves and the failure mechanism derived from three different full-size RC frames are compared with the experimental measurements. By considering shear failure at BCJs, the proposed nonlinear analytical procedures can be used to estimate the structural behavior of RC frames, including seismic capacity and the progressive failure sequence of joints, in a precise and effective manner. 展开更多
关键词 RC frame beam-column joint pushover analysis capacity curve plastic hinge performance-based seismic evaluation
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Study of Suitability of Out-of-Codes Tall Slab-Column and Shearwall Structure 被引量:1
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作者 GUO Nan ZHAO Tingting LIN Yiying 《沈阳建筑大学学报(自然科学版)》 CAS 北大核心 2012年第6期1014-1022,共9页
The purpose of this paper is to discuss the suitability of out-of-codes tall slab-column and shearwall structure and to popularize the structure in seismic region.In the research,flat-plate floor was used in slab-colu... The purpose of this paper is to discuss the suitability of out-of-codes tall slab-column and shearwall structure and to popularize the structure in seismic region.In the research,flat-plate floor was used in slab-column and shearwall structure in the practical engineering,the key parameters of slab-column and shearwall structure and frame-shearwall structure such as deflection,punching shear behavior,story drift and capability curve were worked out by static plastic analysis,elastic-plastic time history analysis and pushover analysis,then the suitability of out-of-codes tall slab-column and shearwall structure was evaluated.The results show that the out-of-codes tall slab-column and shearwall structure studies could satisfy the require of deflection and punching shear behavior,the story drift under 7 degree expected rare earthquake waves could satisfy the limit value in the codes and the seismic design spectrum was crossed by the capability curve of the structure and the structure could not collapse.The conclusion is that slab-column and shearwall structure with reasonable design built in Ⅱ soil site of intensity 7 seismic fortification zone can be designed higher than the limit height in the codes. 展开更多
关键词 slab-column and shearwall structure finite element analysis SUITABILITY out-of-codes
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Rapid Repair of Earthquake Damaged RC Interior Beam-wide Column Joints and Beam-wall Joints Using FRP Composites 被引量:1
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作者 LI Bing LIM Chee Leong 《四川大学学报(工程科学版)》 EI CAS CSCD 北大核心 2009年第3期258-265,共8页
This paper studies the seismic performance of FRP-strengthened RC interior non-seismically detailed beam-wide columns and beam-wall joints after limited seismic damage.Four eccentric and concentric beam-wide column jo... This paper studies the seismic performance of FRP-strengthened RC interior non-seismically detailed beam-wide columns and beam-wall joints after limited seismic damage.Four eccentric and concentric beam-wide column joints and two beam-wall joints,initially damaged in a previous study,were repaired and tested under constant axial loads(0.1fc′Ag and 0.35fc′Ag) and lateral cyclic loading.The rapid repair technique developed,aimed to restore the original strength and to provide minimum drift capacity.The repair schemes were characterized by the use of:(a) epoxy injections and polymer modified cementitious mortar to seal the cracks and replace spalled concrete;and(b) glass(GFRP) and carbon(CFRP) sheets to enhance the joint performance.The FRP sheets were effectively prevented against possible debonding through the use of fiber anchors.Comparison between responses of specimens before and after repair clearly indicated reasonable restoration in strength,drift capacity,stiffness and cumulative energy dissipation capacity.All specimens failed with delamination of FRP sheets at beam-column joint interfaces.The rapid repair technique developed in this study is recommended for mass upgrading or repair of earthquake damaged beam-column joints. 展开更多
关键词 FRP 建筑物 抗震设计 抗震结构
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Experimental Study on Seismic Behavior of Exterior Joints of Special-shaped Columns with Different Lengths of Limbs
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作者 曲福来 黄承逵 赵顺波 《Journal of Southwest Jiaotong University(English Edition)》 2008年第1期46-50,共5页
Four exterior joints with special-shaped columns which have different lengths of limbs are tested under low cyclic loading. Speeial-shaped columns adopted are L- and T-shaped in section. It can be concluded that crack... Four exterior joints with special-shaped columns which have different lengths of limbs are tested under low cyclic loading. Speeial-shaped columns adopted are L- and T-shaped in section. It can be concluded that crack pattern, failure mode and shear strength of joints are affected by the length of limb, and that shear strength and ductility increase with the length of limb; the joints with the flexural failure of the beam have better seismic behavior than those with the shear failure of the joint core. 展开更多
关键词 Special-shaped column Length of limb Frame joint DUCTILITY Energy dissipation
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Seismic Behavior of Confined RC ColumnComposite Beam Joints
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作者 张谦 于庆荣 +1 位作者 管俊峰 吴智敏 《Transactions of Tianjin University》 EI CAS 2014年第3期174-181,共8页
In order to evaluate the seismic behavior of confined RC column-composite beam joints, five interior joints were tested under low cyclic reversed load. The weakening extent of flanges, the number of studs, and whether... In order to evaluate the seismic behavior of confined RC column-composite beam joints, five interior joints were tested under low cyclic reversed load. The weakening extent of flanges, the number of studs, and whether to reinforce weakened flanges were used as parameters in designing these five joints. Failure characteristics, hysteretic curves, skeleton curves, ductility, energy dissipation, strength degradation, and stiffness degradation were analyzed. The test results revealed that the steel beam flanges in the joints were equivalent to the tie rod. Weakened flanges resulted in poor seismic behavior; however, the seismic behavior could be improved by increasing studs and reinforcing weakened flanges. The joint steel plate hoops, equivalent to stirrups, did not yield when the maximum load was reached, but yielded when the failure load was reached for the joints with shear failure. Increasing stud-type joints and reinforcing flange-type joints ensured good seismic behavior and met project requirements. Based on the experimental results, the failure mechanism of the joints was discussed, and the shear capacity equations of the joints was presented. 展开更多
关键词 seismic behavior joint confined RC column composite beam
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Seismic Behaviour of Beam-Column Joints of Precast and Partial Steel Reinforced Concrete 被引量:1
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作者 Wanpeng Cheng Licheng Wang +1 位作者 Yupu Song Jun Wang 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2015年第2期108-117,共10页
A beam-column joint of precast and partial steel reinforced concrete( PPSRC) is proposed for precast reinforced concrete frames. The PPSRC consists of partial steel and reinforced concrete. The partial steel is locate... A beam-column joint of precast and partial steel reinforced concrete( PPSRC) is proposed for precast reinforced concrete frames. The PPSRC consists of partial steel and reinforced concrete. The partial steel is located in the core joint region and the connections between concrete members. This paper presents an experimental study of a series of PPSRC specimens. These specimens are tested under low cyclic loading.Experimental results demonstrate that the bearing capacity of the PPSRC specimens is 3 times that of the ordinary reinforced concrete( RC) beam-column joints. The strength and stiffness degradation rates are slower compared with that of the RC beam-column joints. In addition,the strength of the core joint region and the connections is higher than other parts of the PPSRC specimens. Beam failure occurs firstly for the PPSRC specimens,followed by column failure and connections failure. The failure of the core joint region occurs finally.Test results show that the seismic performance of the PPSRC is better than that of the ordinary RC beam-column joints. 展开更多
关键词 preeast and partial steel reinforced concrete (PPSRC) beam-column joints low cyclic test hysteretic curve degradations of strength and stiffness DUCTILITY
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Punching Shear Behavior of RC Slab-Column Connections with Nonrectangular Columns
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作者 刘文珽 黄承逵 张瑞鹤 《Journal of Southwest Jiaotong University(English Edition)》 2005年第1期70-77,共8页
This paper present an experimental study on the RC slab-column connections with nonrectangular columns, namely cross-shaped column, T-shaped column and L-shaped column. The punching shear deformation and strength char... This paper present an experimental study on the RC slab-column connections with nonrectangular columns, namely cross-shaped column, T-shaped column and L-shaped column. The punching shear deformation and strength characteristics of slab-column connections with nonrectangular columns under punching shear load are investigated. Nine specimens with the three kinds of nonrectangular columns and two reference specimens with square columns are tested. The tested ultimate loads, deformations, and failure modes of specimens are presented and discussed. Test results reveal that the punching shear strength and ductility of the connections with nonrectangular columns are higher than those of the corresponding connections with square columns, and also prove that the application of nonrectangular columns to flat-plate structure was feasible. Based on the test results, one method of calculating punching shear strength of connections with nonrectangular columns is proposed, which conforms with the current design practice of China. The test results on the punching shear strength are compared with the predictions of the formulas proposed by codes of several different countrie; and the predictions given by ACI code and China code are found to be conservative as the reinforcement ratio is increased. 展开更多
关键词 Nonrectangular columns Reinforced concrete slab-column connections Punching shear DUCTILITY
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Effects of edge beams on mechanic behavior under lateral load in reinforced concrete hollow slab-column structure
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作者 成洁筠 杨建军 唐小弟 《Journal of Central South University》 SCIE EI CAS 2008年第S1期61-66,共6页
In order to get the formulae for calculating the equivalent frame width coefficient of reinforced concrete hollow slab-column structures with edge beam,the finite element structural program was used in the elastic ana... In order to get the formulae for calculating the equivalent frame width coefficient of reinforced concrete hollow slab-column structures with edge beam,the finite element structural program was used in the elastic analysis of reinforced concrete hollow slab-column structure with different dimensions to study internal relationship between effective beam width and the frame dimensions.In addition,the formulas for calculating the increasing coefficient of edge beam were also obtained. 展开更多
关键词 reinforced concrete HOLLOW slab-column structure edge beam equivalent frame width COEFFICIENT increasing COEFFICIENT
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Study on the Distribution Law of Horizontal Seismic Forces between Slab-Column and Shear Wall
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作者 GUO Nan GUO Yihong YANG Yingwei 《沈阳建筑大学学报(自然科学版)》 CAS 北大核心 2012年第3期443-448,共6页
In slab column-shear wall structures,both the whole structure′s seismic behavior and failure mode are greatly influenced by the distribution of horizontal seismic forces between slab-column and shear wall.In this pap... In slab column-shear wall structures,both the whole structure′s seismic behavior and failure mode are greatly influenced by the distribution of horizontal seismic forces between slab-column and shear wall.In this paper,a pushover analysis of topical slab column-shear wall structure was carried out,the seismic shear force that the slab-column and shear wall should undertake was worked out,the influences of plastic internal force redistribution and structure stiffness characteristic value on horizontal seismic distribution were studied and the calculation formula was given.The analysis results showed that with the yield of the shear walls,the story shear force was undertaken by slab-columns correspondingly increased while with the decrease of characteristic value of stiffness of a structure,and the horizontal seismic force was undertaken by slab-columns correspondingly decreased.According to the code,the design of horizontal force distribution may be cause insecurity problems,so it is necessary to give the distribution law of horizontal seismic forces in slab-column shear wall structures as the supplement to the corresponding regulation of the Code. 展开更多
关键词 slab column-shear wall structure horizontal seismic force pushover analysis plastic internal force redistribution characteristic value of stiffness of structure
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Seismic Behavor of RC Beam-Column Joint with Additional Bars under Cyclic Loading
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作者 LU Xilin Tonny H. URUKAP LI Sen 《结构工程师》 2011年第B01期306-312,共7页
The behavior of Beam-Column Joints in moment resisting frame structures are susceptible to damage caused by seismic effects due to poor performance of the joint.A good number of researches were carried out to understa... The behavior of Beam-Column Joints in moment resisting frame structures are susceptible to damage caused by seismic effects due to poor performance of the joint.A good number of researches were carried out to understand the complex mechanism of RC joints which are considered in seismic design code practices presently adopted.The traditional construction detailing of transverse reinforcement have shown serious joint failure. This paper introduces a new design philosophy involving the use of additional diagonal bars within the joint particularly suitable for low to medium seismic effects in earthquake zones throughout the world.In lieu to this study,ten(10) full-scale interior beam-column specimens were constructed with various additional reinforcement details and configurations as will be discussed in the later.The experiment provided adequate results to proof the idea of additional bars as suitable approach in reinforced concrete structures where earthquake is eminent.While compared with overall cracking observation during the test,the specimen with additional bars (diagonal and straight) had shown few cracks on the column than the ones without.Furthermore,concrete confinement is certainly an important design method as recommended by certain international codes. 展开更多
关键词 地震学 理论 方法 地震波
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Static behavior of semi-rigid thin-walled steel-concrete composite beam-to-column joints with bolted partial-depth flush end plate:experimental study
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作者 郜京峰 张耀春 +2 位作者 王海明 姚淇誉 金路 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2011年第5期91-102,共12页
A new type of semi-rigid thin-walled steel-concrete composite beam-to-column joint has been proposed in this paper.Five semi-rigid composite beam-to-column joint specimens subjected to hogging moments under monotonic ... A new type of semi-rigid thin-walled steel-concrete composite beam-to-column joint has been proposed in this paper.Five semi-rigid composite beam-to-column joint specimens subjected to hogging moments under monotonic loading were tested to study the static behavior of this new type of joint.The main variable parameters for the five joint specimens were the longitudinal reinforcement ratio and the joint type.The experimental results designated that the magnitude of extension of the longitudinal reinforcement is the most important factor that influenced the moment-rotation characteristic of the new type of joint.The concrete slabs could resist 3.8%-19.1% of the total shear load applied to the cross-sections near the beam-to-column connection.The edge stiffened elements,such as the flange of the lipped I-section thin-walled steel beam,were capable of having considerable inelastic deformation capacity although they had comparatively large width-to-thickness ratios.The shear failure of the concrete cantilever edge strip must be taken into account in practical design because it has significant influence on the anchorage of the longitudinal reinforcement in the new type of external joints. 展开更多
关键词 SEMI-RIGID thin-walled steel-concrete composite structures beam-to-column joints static behavior experimental study
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Finite Element Analysis (FEA) for the Beam-Column Joint Subjected to Cyclic Loading Was Performed Using ANSYS
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作者 B. Venkatesan R. Ilangovan +2 位作者 P. Jayabalan N. Mahendran N. Sakthieswaran 《Circuits and Systems》 2016年第8期1581-1597,共17页
This paper analyses the seismic performance of exterior beam-column joints strengthened with unconventional reinforcement detailing. The beam-column joint specimens were tested with reverse cyclic loading applied at t... This paper analyses the seismic performance of exterior beam-column joints strengthened with unconventional reinforcement detailing. The beam-column joint specimens were tested with reverse cyclic loading applied at the beam end. The samples were divided into two groups based on the joint reinforcement detailing. The first group (Group A) of three non-ductility specimens had joint detailing in accordance with the construction code of practice in India IS456-2000, and the second group (Group B) of three ductility specimens had joint reinforcement detailed as per IS13920-1993, with similar axial load cases as the first group. The experimental studies are proven with the analytical studies carried out by finite element models using ANSYS. The results show that the hysteresis simulation is satisfactory for both un-strengthened and ferrocement strengthened specimens. Furthermore, when ferrocement strengthening is employed, the strengthened beam-column joints exhibit better structural performance than the un-strengthened specimens of about 31.56% and 38.98 for DD-T1 and DD-T2 respectively. The analytical shear strength predictions were in line with the test results reported in the literature, thus adding confidence to the validity of the proposed models. 展开更多
关键词 Beam-column joints Cyclic Load FERROCEMENT DUCTILITY Hysteresis Curve ANSYS
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Study on Strengthening of RC Beam Column Joint Using Hybrid FRP Composites
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作者 A. Arul Gnanapragasam G. Chitra S. Robert Ravi 《Circuits and Systems》 2016年第10期2846-2856,共11页
Beam-Column joints are critical zones in reinforced concrete structures which are most vulnerable to earthquake forces. Hence strengthening beam-column joint is vital to save the structure and its inhabitants in case ... Beam-Column joints are critical zones in reinforced concrete structures which are most vulnerable to earthquake forces. Hence strengthening beam-column joint is vital to save the structure and its inhabitants in case of seismic forces. Numerous retrofitting works using fibre reinforced polymer (FRP) composites are being undertaken worldwide. This work aims to investigate the effectiveness of strengthening beam-column joints using natural and artificial fibres. In this study, basalt (natural fibres) as monolithic composite (BFRP) and as hybrid composite along with glass (artificial fibres) were used for strengthening of beam-column joints. Totally six specimens were prepared and tested under monotonic loading. Specimen details used were: two control specimen, two specimens for monolithic wrapping and remaining two specimens for hybrid wrapping. The test results were compared with control and rehabilitated specimens. The performance of the treated joints was studied using the following parameters: initial and ultimate cracking loads, energy absorption, deflection ductility and stiffness at ultimate. From the test results, it was found that the hybrid combination of Basalt and Glass FRPs were found to be more effective in the treatment of beam-column joints. The strong column weak beam concept was achieved by failure in beam portion which helped in preventing the catastrophic failure of the entire structure. 展开更多
关键词 FRP Reinforced Concrete Beam-column joints Glass Fibre Reinforced Polymer Basalt Fibre Reinforced Polymer
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板柱节点考虑弯剪相关性的受冲切承载力计算方法
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作者 郑文忠 吕盛先 +1 位作者 郑博文 王英 《哈尔滨工业大学学报》 EI CAS 北大核心 2025年第1期65-76,共12页
对于同时受到竖向荷载和不平衡弯矩作用的板柱节点,目前已有方法大多将不平衡弯矩等效为竖向荷载,从而给出其受冲切承载力计算方法。但该方法所涉及的不平衡弯矩比例系数的计算还存在较大争议,且没有考虑竖向荷载与不平衡弯矩耦合的影... 对于同时受到竖向荷载和不平衡弯矩作用的板柱节点,目前已有方法大多将不平衡弯矩等效为竖向荷载,从而给出其受冲切承载力计算方法。但该方法所涉及的不平衡弯矩比例系数的计算还存在较大争议,且没有考虑竖向荷载与不平衡弯矩耦合的影响。因此,本文首先通过推导给出仅有竖向荷载作用的板柱节点受冲切承载力计算公式和仅有不平衡弯矩作用的板柱节点受弯承载力计算公式,并与试验结果进行对比,验证了所提公式的合理性。然后基于板柱节点在竖向荷载和不平衡弯矩共同作用下的试验结果,拟合得到板柱节点考虑弯剪相关性的受冲切承载力计算公式。最后对所提计算方法与不同规范计算方法进行对比,结果表明本文计算方法能够更加准确地预测板柱节点受冲切承载力。 展开更多
关键词 板柱节点 竖向荷载 不平衡弯矩 受冲切承载力 计算方法
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钢板混凝土墙-钢筋混凝土楼板连接节点抗剪性能
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作者 于跃 隋春光 +1 位作者 雷永旺 郭全全 《哈尔滨工业大学学报》 EI CAS 北大核心 2025年第1期92-100,共9页
模块化技术正在推动新一代核电厂的设计和发展,兼具优良工作性能和工业化施工性能的钢板混凝土(SC)结构在模块化结构具有广泛应用前景。SC墙-RC楼板连接节点作为SC模块结构与RC结构之间的典型传力构件,其结构设计必须既要保证荷载的有... 模块化技术正在推动新一代核电厂的设计和发展,兼具优良工作性能和工业化施工性能的钢板混凝土(SC)结构在模块化结构具有广泛应用前景。SC墙-RC楼板连接节点作为SC模块结构与RC结构之间的典型传力构件,其结构设计必须既要保证荷载的有效传递,又要考虑模块化施工的可行性。为研究SC墙-RC楼板连接节点抗剪性能,设计并完成了2个“薄墙厚板型”SC墙-RC楼板连接节点循环加载试验,包括GB/T 51340—2018建议的钢筋连接器连接、附加抗剪键等两种连接方式。试验结果表明:在剪跨比1.50下试件均发生RC楼板弯剪破坏,节点主要传力破坏路径为加载端至楼板根部的斜压杆区域,说明节点结合面不配置抗剪键仍满足抗剪要求;试验过程中,直螺纹钢筋套筒无滑脱、未发生钢筋或焊缝拉断,延性系数均大于4,说明钢筋连接器连接的传力性能良好,可作为SC墙-RC楼板连接节点的有效连接方式;该节点核心区仍属于抗剪薄弱区域,若要满足“全强度连接”设计准则,核心区对拉筋体积含钢率应不低于0.59%。 展开更多
关键词 钢板混凝土墙 钢筋混凝土楼板 连接节点 钢筋连接器 抗剪键
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新型浆锚连接方钢管混凝土拼接柱抗震性能试验研究
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作者 郑立文 李智 +3 位作者 赵亮 胡少伟 李景浩 齐浩 《土木与环境工程学报(中英文)》 北大核心 2025年第1期152-166,共15页
为进一步提高用于钢-混凝土组合结构的柱构件的装配效率,并改善其抗震性能,降低生产成本,提出一种新型浆锚连接方钢管混凝土拼接柱设计方法。通过对缩尺比例为2的5个拼接柱构件和1个整浇柱构件开展拟静力试验,获得不同配筋率、配筋形式... 为进一步提高用于钢-混凝土组合结构的柱构件的装配效率,并改善其抗震性能,降低生产成本,提出一种新型浆锚连接方钢管混凝土拼接柱设计方法。通过对缩尺比例为2的5个拼接柱构件和1个整浇柱构件开展拟静力试验,获得不同配筋率、配筋形式和柱-柱节点拼接部位的新型拼接柱的抗震性能。试验结果表明:新型拼接柱构件在低周期反复荷载下的破坏过程及其形态与整浇柱构件相似,其滞回曲线饱满,耗能能力、抗承载力退化和抵抗变形(刚度)能力均比整浇柱构件更加优良,特别是将柱-柱节点拼接部位设于柱间反弯点区域的P类型构件变形能力最佳,证明了该新型拼接柱设计方法的科学性,并对提高钢-混凝土组合框架结构的整体抗震性能具有应用潜力。 展开更多
关键词 钢管混凝土柱 浆锚连接 拼接部位 拟静力试验 抗震性能
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单向载荷下高层建筑钢结构梁柱焊接节点的失效研究
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作者 汪任凭 宋晓茜 《兵器材料科学与工程》 北大核心 2025年第1期127-132,共6页
为确保高层建筑钢结构梁柱焊接节点在风载荷、地震载荷等单向载荷下具备抗裂性,保障高层建筑钢结构的安全,对单向载荷下高层建筑钢结构梁柱焊接节点断裂性能进行研究。设计单V坡口全熔透焊和角焊缝两种焊接形式的梁柱焊接节点试件,通过... 为确保高层建筑钢结构梁柱焊接节点在风载荷、地震载荷等单向载荷下具备抗裂性,保障高层建筑钢结构的安全,对单向载荷下高层建筑钢结构梁柱焊接节点断裂性能进行研究。设计单V坡口全熔透焊和角焊缝两种焊接形式的梁柱焊接节点试件,通过有限元模拟软件生成试件的三维模型,向试件施加单向载荷,用等效塑性应变指数(PI)、开裂指数(RI)及应力三轴度等分析试件的断裂形态。结果表明:在不同载荷阶段,单V坡口全熔透焊的PI指数、RI指数及应力三轴度均低于角焊缝焊接的试件,且随着载荷增加,单V坡口全熔透焊梁柱焊接节点的承载力未大幅下降。因此可知,单V坡口全熔透焊的焊接节点更适用于高层建筑钢结构。 展开更多
关键词 单向载荷 高层建筑 钢结构 梁柱焊接节点 开裂指数
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装配式钢结构梁柱连接节点研究进展
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作者 胡太伟 《山西建筑》 2025年第1期46-50,共5页
装配式建筑既是建筑现代设计理念、构件生产、现场管理革新的重要途径,也是推行组件化理念和智能化转型的重要举措。结合目前国内装配式钢结构梁柱连接节点研究情况,对可恢复式梁柱节点、方钢管柱-桁架梁、带悬臂梁节点、框架体系装配... 装配式建筑既是建筑现代设计理念、构件生产、现场管理革新的重要途径,也是推行组件化理念和智能化转型的重要举措。结合目前国内装配式钢结构梁柱连接节点研究情况,对可恢复式梁柱节点、方钢管柱-桁架梁、带悬臂梁节点、框架体系装配式节点形式的构造和力学性能进行阐述与总结。研究表明,装配式钢结构梁柱具有良好的承载力、延性和抗震性能,但是目前基于装配式节点构造及各参数的研究主要针对二维平面,一定程度上制约了其应用和发展,后续需对节点在火灾作用下的破坏及损伤时序、三维空间结构中楼板与梁柱节点的连接方式和考虑楼板后整体结构的复位机理与刚度变化历程进行进一步研究,为增加新材料、新工艺的应用,推广至实际工程提供理论依据。 展开更多
关键词 装配式钢结构 套筒连接 框架体系 梁柱节点
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