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Nonlinear Behavior of Reinforced Concrete Slit Shear Walls under Seismic Actions *
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作者 戴航 陈忠范 +1 位作者 关国雄 张佑启 《Journal of Southeast University(English Edition)》 EI CAS 1998年第1期86-92,共7页
A reinforced concrete slit shear wall is a new breed of earthquake resistant structure recently proposed by the authors. In this paper, the seismic responses of the slit shear walls under the shake of earthquake exci... A reinforced concrete slit shear wall is a new breed of earthquake resistant structure recently proposed by the authors. In this paper, the seismic responses of the slit shear walls under the shake of earthquake excitation have been dealt with. Based on a simplified structural model, which is shown to have a sufficient accuracy for the real slit shear wall structure, the analysis focuses on the influence of nonlinear behavior of the connecting beams between the slits on the dynamic performance of the whole slit shear wall structure. It has been found that the yielding of connecting beams in a slit shear wall can provide significant improvement in reducing the structural responses, and by choosing an appropriate strength value for the connecting beams, it is possible to optimize the seismic response of the slit shear wall. 展开更多
关键词 seismic response slit shear wall reinforced concrete connecting beam
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Post-fire cyclic behavior of reinforced concrete shear walls 被引量:5
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作者 刘桂荣 宋玉普 曲福来 《Journal of Central South University》 SCIE EI CAS 2010年第5期1103-1108,共6页
The effects of fire exposure,reinforcement ratio and the presence of axial load under fire on the seismic behavior of reinforced concrete(RC) shear walls were investigated.Five RC shear walls were tested under low cyc... The effects of fire exposure,reinforcement ratio and the presence of axial load under fire on the seismic behavior of reinforced concrete(RC) shear walls were investigated.Five RC shear walls were tested under low cyclic loading.Prior to the cyclic test,three specimens were exposed to fire and two of them were also subjected to a constant axial load.Test results indicate that the ultimate load of the specimen with lower reinforcement ratio is reduced by 15.8%after exposure to elevated temperatures.While the reductions in the energy dissipation and initial stiffness are 59.2%and 51.8%,respectively,which are much higher than those in the ultimate load.However,this deterioration can be slowed down by properly increasing reinforcement due to the strength and stiffness recovery of steel bars after cooling.In addition,the combined action of elevated temperatures and axial load results in more energy dissipation than the action of fire exposure alone. 展开更多
关键词 shear wall reinforced concrete post-fire seismic behavior low cyclic loading
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Nonlinear Finite Element Analysis of Mechanical Performance of Reinforced Concrete Short-Limb Shear Wall 被引量:1
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作者 XUELi-min 《Wuhan University Journal of Natural Sciences》 EI CAS 2005年第3期562-565,共4页
On the basis of test, nonlinear finite element analysis of reinforcedconcrete (R. C) short-limb shear walls under monotonic horizontal load are carried out by ANSYSprogram in order to understand the evolution of crack... On the basis of test, nonlinear finite element analysis of reinforcedconcrete (R. C) short-limb shear walls under monotonic horizontal load are carried out by ANSYSprogram in order to understand the evolution of cracking, deformation and failure course of thespecimens. At the same time, the results of numerical calculation are compared with the results oftest. The results indicate that, under monotonic horizontal load the failures of the specimens withflange wall and without flange wall all occur at the intersections of lintel bottom and limb ofwall, the failures also occur at the bottom of limb; the load-displacement curve of wall withoutflange is steeper than that of wall with flange, and the ductility is worse than that of wall withflange; the results, such as cracking, deformation, yield load and so on of finite element analysisagree well with the results of test. These results provide theoretical basis of study andapplication of R. C short-limb shear wall. 展开更多
关键词 reinforced concrete short-limb shear wall mechanical performance finiteelement method NONLINEAR
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Performance index limits of high reinforced concrete shear wall components 被引量:1
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作者 劳晓春 韩小雷 《Journal of Central South University》 SCIE EI CAS 2011年第4期1248-1255,共8页
The deformation performance index limits of high reinforced concrete (RC) shear wall components based on Chinese codes were discussed by the nonlinear finite element method. Two typical RC shear wall specimens in th... The deformation performance index limits of high reinforced concrete (RC) shear wall components based on Chinese codes were discussed by the nonlinear finite element method. Two typical RC shear wall specimens in the previous work were first used to verify the correctness of the nonlinear finite element method. Then, the nonlinear finite element method was applied to study the deformability of a set of high RC shear wall components designed according to current Chinese codes and with shear span ratio λ≥2.0. Parametric studies were made on the influence of shear span ratio, axial compression ratio, ratio of flexural capacity to shear capacity and main flexural reinforcement ratio of confined botmdary members. Finally, the deformation performance index and its limits of high RC shear wall components under severe earthquakes were proposed by the finite element model results, which offers a reference in determining the performance status of RC shear wall components designed based on Chinese codes. 展开更多
关键词 reinforced concrete shear wall components performance index limits nonlinear finite element method Chinese codes
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Experimental studies on behavior of fully grouted reinforced-concrete masonry shear walls 被引量:3
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作者 Zhao Yan Wang Fenglai 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2015年第4期743-757,共15页
An experimental study is conducted on fully grouted reinforced masonry shear walls (RMSWs) made from concrete blocks with a new configuration. Ten RMSWs are tested under reversed cyclic lateral load to investigate the... An experimental study is conducted on fully grouted reinforced masonry shear walls (RMSWs) made from concrete blocks with a new configuration. Ten RMSWs are tested under reversed cyclic lateral load to investigate the influence of different reinforcements and applied axial stress values on their seismic behavior. The results show that flexural strength increases with the applied axial stress, and shear strength dominated by diagonal cracking increases with both the amount of horizontal reinforcement and applied axial stress. Yield displacement, ductility, and energy dissipation capability can be improved substantially by increasing the amount of horizontal reinforcement. The critical parameters for the walls are derived from the experiment: displacement ductility values corresponding to 15% strength degradation of the walls reach up to 2.6 and 4.5 in the shear and flexure failure modes, respectively; stiffness values of flexure- and shear-dominated walls rapidly degrade to 17%–19% and 48%–57% of initial stiffness at 0.50 D<sub>max</sub> (displacement at peak load). The experiment suggests that RMSWs could be assigned a higher damping ratio (~14%) for collapse prevention design and a lower damping value (~7%) for a fully operational limit state or serviceability limit state. 展开更多
关键词 reinforced-concrete masonry shear wall shear strength DUCTILITY stiffness degradation energy dissipation equivalent viscous damping ratio
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Analysis on Construction Quality Control Technology of Reinforced Concrete Shear Wall Structure
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作者 Ting Zhou 《Frontiers Research of Architecture and Engineering》 2018年第4期117-121,共5页
In the process of continuous development of construction enterprises, new requirements have been put forward for construction projects. By strengthening the construction quality control of reinforced concrete shear wa... In the process of continuous development of construction enterprises, new requirements have been put forward for construction projects. By strengthening the construction quality control of reinforced concrete shear wall structure, the construction level of reinforced concrete can be continuously improved, the construction quality can be guaranteed, and the construction project can be successfully completed, which is worthy of extensive application and promotion in construction enterprises, thus providing a broader development space for construction enterprises. 展开更多
关键词 reinforced concrete shear wall structure Construction QUALITY Control technology
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Experimental and analytical study on seismic behavior of steel-concrete multienergy dissipation composite shear walls 被引量:5
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作者 Dong Hongying Cao Wanlin +2 位作者 Wu Haipeng Qiao Qiyun Yu Chuanpeng 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2015年第1期125-139,共15页
In this paper, a steel-concrete multi-energy dissipation composite shear wall, comprised of steel-reinforced concrete (SRC) columns, steel plate (SP) deep beams, a concrete wall and energy dissipation strips, is p... In this paper, a steel-concrete multi-energy dissipation composite shear wall, comprised of steel-reinforced concrete (SRC) columns, steel plate (SP) deep beams, a concrete wall and energy dissipation strips, is proposed. In order to study the multi-energy dissipation behavior and restorability after an earthquake, two stages of low cyclic loading tests were carded out on ten test specimens. In the first stage, test on five specimens with different number of SP deep beams was carried out, and the test lasted until the displacement drift reached 2%. In the second stage, thin SPs were welded to both sides of the five specimens tested in the first stage, and the same test was carried out on the repaired specimens (designated as new specimens). The load-bearing capacity, stiffness, ductility, hysteretic behavior and failure characteristics were analyzed for both stages and the results are discussed herein. Extrapolating from these results, strength calculation models and formulas are proposed herein and simulations using ABAQUS carried out, they show good agreement with the test results. The study demonstrates that SRC columns, SP deep beams, concrete wall and energy dissipation strips cooperate well and play an important role in energy dissipation. In addition, this study shows that the shear wall has good recoverability after an earthquake, and that the welding of thin SP's to repair a deformed wall is a practicable technique. 展开更多
关键词 steel reinforced concrete steel plate deep beam multi energy dissipation composite shear wall seismic behavior
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Effect of Eccentric Shear Stiffness of Walls on Structural Response of RC Frame Buildings
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作者 Muhammad Umair Saleem 《Open Journal of Civil Engineering》 2017年第4期527-538,共12页
Current research study consists of determining the optimum location of the shear wall to get the maximum structural efficiency of a reinforced concrete frame building. It consists of a detailed analysis and design rev... Current research study consists of determining the optimum location of the shear wall to get the maximum structural efficiency of a reinforced concrete frame building. It consists of a detailed analysis and design review of a seven-story reinforced concrete building to understand the effect of shear wall location on the response of reinforced concrete structures when subjected to different earthquake forces. Three trail locations of shear walls are selected and their performance is monitored in terms of structural response under different lateral loads. Required objectives are achieved by obtaining design and construction drawings of an existing reinforced concrete structure and modeling it on Finite Element Method (FEM) based computer software. The structure is redesigned and discussed with four different configurations (one without shear wall and three with shear walls). Main framing components (Beams, Columns and Shear walls) of the superstructure are designed using SAP 2000 V. 19.0 whereas substructure (foundation) of RC building was?designed using SAFE. American Concrete Institute (ACI) design specifications were used to calculate the cracked section stiffness or non-linear geometrical properties of the cracked section. Uniform Building Code (UBC-97) procedures were adopted to calculate the lateral earthquake loading on the structures. Structural response of the building was monitored at each story level for each earthquake force zone described by the UBC-97. The earthquake lateral forces were considered in both X and Y direction of the building. Each configuration of shear wall is carefully analyzed and effect of its location is calibrated by the displacement response of the structure. Eccentricity to the lateral stiffness of the building is imparted by changing the location of shear walls. Results of the study have shown that the location of shear wall significantly affects the lateral response of the structure under earthquake forces. It also motivates to carefully decide the center of lateral stiffness of building prior to deciding the location of shear walls. 展开更多
关键词 reinforced concrete BUILDINGS COMPUTER aided Modelling shear walls Stiff-ness Deformations
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Structural Analysis of a RC Shear Wall by Use of a Truss Model
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作者 Panagis G. Papadopoulos Periklis E. Lamprou 《Open Journal of Civil Engineering》 CAS 2022年第3期320-352,共33页
Purpose of present work is to develop a reliable and simple method for structural analysis of RC Shear Walls. The shear wall is simulated by a truss model as the bar of a truss is the simplest finite element. An itera... Purpose of present work is to develop a reliable and simple method for structural analysis of RC Shear Walls. The shear wall is simulated by a truss model as the bar of a truss is the simplest finite element. An iterative method is used. Initially, there are only concrete bars. Repeated structural analyses are performed. After each structural analysis, every concrete bar exceeding tensile strength is replaced by a steel bar. For every concrete bar exceeding compressive strength, first its section area is increased. If this is not enough, a steel bar is placed at the side of it. For every steel bar exceeding tensile or compressive strength, its section area is increased. After the end of every structural analysis, if all concrete and steel bars fall within tensile and compressive strengths, the output data are written and the analysis is terminated. Otherwise, the structural analysis is repeated. As all the necessary conditions (static, elastic, linearized geometric) are satisfied and the stresses of ALL concrete and steel bars fall within the tensile and compressive strengths, the results are acceptable. Usually, the proposed method exhibits a fast convergence in 4 - 5 repeats of structural analysis of the RC Shear Wall. 展开更多
关键词 reinforced concrete shear wall Structural Analysis Truss Model Iterative Method Computer Program Boundary Columns and Beam Grid of Horizontal and Diagonal Reinforcing Steel Bars
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Performance evaluation of low-rise infilled reinforced concrete frames designed by considering local effects on column shear demand
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作者 Jarun SRECHAI Wongsa WARARUKSAJJA +1 位作者 Sutat LEELATAVIWAT Suchart LIMKATANYU 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2023年第5期686-703,共18页
The interactions between reinforced concrete(RC)frames and infill walls play an important role in the seismic response of frames,particularly for low-rise frames.Infill walls can increase the overall lateral strength ... The interactions between reinforced concrete(RC)frames and infill walls play an important role in the seismic response of frames,particularly for low-rise frames.Infill walls can increase the overall lateral strength and stiffness of the frame owing to their high strength and stiffness.However,local wall-frame interactions can also lead to increased shear demand in the columns owing to the compressive diagonal strut force from the infill wall,which can result in failure or in serious situations,collapse.In this study,the effectiveness of a design strategy to consider the complex infill wall interaction was investigated.The approach was used to design example RC frames with infill walls in locations with different seismicity levels in Thailand.The performance of these frames was assessed using nonlinear static,and dynamic analyses.The performance of the frames and the failure modes were compared with those of frames designed without considering the infill wall or the local interactions.It was found that even though the overall responses of the buildings designed with and without consideration of the local interaction of the infill walls were similar in terms the overall lateral strength,the failure modes were different.The proposed method can eliminate the column shear failure from the building.Finally,the merits and limitations of this approach are discussed and summarized. 展开更多
关键词 reinforced concrete frames infill wall seismic design method shear failure wall-frame interaction
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Function-Integrative Textile Reinforced Concrete Shells
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作者 Sandra Gelbrich Henrik L. Funke Lothar Kroll 《Open Journal of Composite Materials》 2018年第4期161-174,共14页
This paper presents the development and technological implementation of textile reinforced concrete (TRC) shells with integrated functions, such as illumination and light control. In that regard the establishment of m... This paper presents the development and technological implementation of textile reinforced concrete (TRC) shells with integrated functions, such as illumination and light control. In that regard the establishment of material, structural and technological foundations along the entire value chain are of central importance: From the light-weight design idea to the demonstrator and reference object, to the technological implementation for the transfer of the research results into practice. The development of the material included the requirement-oriented composition of a high-strength fine grained concrete with an integrated textile reinforcement, such as carbon knitted fabrics. Innovations in formwork solutions provide new possibilities for concrete constructions. So, a bionic optimized shape of the pavilion was developed, realized by four connected TRC-lightweight-shells. The thin-walled TRC-shells were manufactured with a formwork made of glass-fibre reinforced polymer (GFRP). An advantage of the GFRP-formwork is the freedom of design concerning the formwork shape. Moreover, an excellent concrete quality can be achieved, while the production of the precast concrete components is simple and efficient simultaneously. After the production the new TRC-shells were installed and assembled on the campus of TU-Chemnitz. A special feature of the research pavilions are the LED light strips integrated in the shell elements, providing homogeneous illumination. 展开更多
关键词 TEXTILE reinforced concrete Carbon reinforced concrete TEXTILE reinforced Composites Function-Integrated Lightweight Structures Glass-Fibre reinforced Polymer FORMWORK Thin-walled SHELLS
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High-Rise Residential Reinforced Concrete Building Optimisation
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作者 Haibei Xiong Miguel Angel Hidalgo Calvo 《Open Journal of Civil Engineering》 2015年第4期437-450,共14页
In the last few decades structure optimisation has become a main task in a civil engineering project. As a matter of fact, due to the complexity and particularity of every structure, the great amount of variables and ... In the last few decades structure optimisation has become a main task in a civil engineering project. As a matter of fact, due to the complexity and particularity of every structure, the great amount of variables and design criteria to considerate and many other factors, a general optimisation’s method is not simple to formulate. As a result, this paper focuses on how to provide a successful optimisation method for a particular building type, high-rise reinforced concrete buildings. The optimization method is based on decomposition of the main structure into substructures: floor system, vertical load resisting system, lateral load resisting system and foundation system;then each of the subsystems using the design criteria established at the building codes is improved. Due to the effect of the superstructure optimisation on the foundation system, vertical and lateral load resisting system is the last to be considered after the improvement of floor. Finally, as a case example, using the method explained in the paper, a 30-story-high high-rise residential building complex is analysed and optimised, achieving good results in terms of structural behaviour and diminishing the overall cost of the structure. 展开更多
关键词 STRUCTURE Optimisation HIGH-RISE RESIDENTIAL reinforced concrete Buildings shear-wall STRUCTURE Deep PILES Post GROUTING
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HPC端部加强双钢板组合剪力墙的抗震性能
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作者 袁朝庆 李国洋 +2 位作者 代晓辉 房宽光 计静 《黑龙江科技大学学报》 CAS 2024年第1期61-68,共8页
为研究高性能混凝土端部加强双钢板组合剪力墙受力机理及破坏形态,以轴压比、腹部普通混凝土强度等级为关键参数,设计了4片普通试件,7片HPC端部加强试件,运用ABAQUS构建其有限元模型,研究其抗震性能。结果表明:同轴压比下,HPC端部加强... 为研究高性能混凝土端部加强双钢板组合剪力墙受力机理及破坏形态,以轴压比、腹部普通混凝土强度等级为关键参数,设计了4片普通试件,7片HPC端部加强试件,运用ABAQUS构建其有限元模型,研究其抗震性能。结果表明:同轴压比下,HPC端部加强试件相比普通试件屈服荷载提高16.30%,峰值荷载提升13.40%;随着轴压比提高,HPC端部加强试件峰值荷载和屈服荷载分别提高7.22%和2.72%,随着轴压比减小,HPC端部加强试件延性提升22.26%;提高腹部腔体混凝土强度等级,HPC端部加强试件的屈服荷载和峰值荷载分别提高13.01%和11.14%,延性提升16.91%。 展开更多
关键词 HPC端部加强 双钢板组合剪力墙 抗震性能
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钢筋混凝土薄壁空心高墩塑性铰长度计算方法
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作者 袁辉辉 程军 +3 位作者 蔡丁锡 吴庆雄 詹远辉 袁朝阳 《福州大学学报(自然科学版)》 CAS 北大核心 2024年第5期577-586,共10页
针对我国现行抗震设计规范尚未明确给出钢筋混凝土(RC)薄壁空心高墩塑性铰长度计算方法的问题,首先收集整理了既有RC桥墩塑性铰长度计算方法以及试验数据,分析影响塑性铰计算长度的主要因素;同时对实际桥梁工程采用的RC薄壁空心墩构造... 针对我国现行抗震设计规范尚未明确给出钢筋混凝土(RC)薄壁空心高墩塑性铰长度计算方法的问题,首先收集整理了既有RC桥墩塑性铰长度计算方法以及试验数据,分析影响塑性铰计算长度的主要因素;同时对实际桥梁工程采用的RC薄壁空心墩构造参数进行统计归纳.在验证有限元建模方法准确性后,采用ABAQUS软件建立了高度为40~120 m的8种典型RC薄壁空心高墩的精细化有限元模型,并开展非线性推覆分析,得到不同高度桥墩的等效塑性铰长度.最后讨论不同塑性铰长度计算方法的适用性,发现Eurocode 8规范的计算公式精度最高,可用于计算RC薄壁空心高墩的塑性铰长度. 展开更多
关键词 塑性铰长度 连续刚构桥 钢筋混凝土薄壁空心高墩 有限元分析
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单钢板混凝土剪力墙结构钢筋工程施工策划及实施
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作者 李铁兵 李海兵 +2 位作者 韩冰洋 李佳傲 王克 《建筑技术》 2024年第13期1552-1556,共5页
单钢板混凝土剪力墙结构是钢-混凝土组合剪力墙结构形式中的一种,可通过钢结构与钢筋混凝土结构的协同工作,充分发挥各自的优势。在钢筋混凝土剪力墙结构中配置端部型钢和钢板,会造成钢结构与混凝土结构相互交叉影响,改变钢筋混凝土剪... 单钢板混凝土剪力墙结构是钢-混凝土组合剪力墙结构形式中的一种,可通过钢结构与钢筋混凝土结构的协同工作,充分发挥各自的优势。在钢筋混凝土剪力墙结构中配置端部型钢和钢板,会造成钢结构与混凝土结构相互交叉影响,改变钢筋混凝土剪力墙的施工工艺,因此要提前策划、采取应对措施,在满足结构设计和规范要求的前提下,做到钢结构快速精准安装,为后续插入钢筋绑扎工程创造条件,合理预留与钢筋工程的连接条件。钢筋骨架设置于钢结构外侧,要解决钢筋垂直于钢结构受到阻挡时采取的穿越/连接节点作法,以及整体钢筋施工工艺的梳理,使钢筋绑扎工程能够既符合要求,又能快速、有序安装,提高功效、保证质量。 展开更多
关键词 单钢板混凝土剪力墙 钢筋工程 优化
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装配式带夹芯保温槽型玻璃钢-钢板-槽钢-混凝土组合剪力墙轴压性能研究
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作者 刘学春 王晶 陈学森 《建筑结构》 北大核心 2024年第20期66-75,共10页
提出一种装配式带夹芯保温槽型玻璃钢-钢板-槽钢-混凝土组合剪力墙,设计3个具有不同配筋形式和混凝土种类的墙板试件进行轴心受压试验,获得墙板在轴压作用下的破坏模式、荷载-位移曲线、荷载-应变曲线、承载力储备系数、延性系数、材料... 提出一种装配式带夹芯保温槽型玻璃钢-钢板-槽钢-混凝土组合剪力墙,设计3个具有不同配筋形式和混凝土种类的墙板试件进行轴心受压试验,获得墙板在轴压作用下的破坏模式、荷载-位移曲线、荷载-应变曲线、承载力储备系数、延性系数、材料利用率等性能指标。通过ABAQUS有限元分析软件对墙板进行参数化分析,研究内嵌钢板强度和厚度对其轴压性能的影响。结果表明,墙板具有良好的承载力储备能力和延性性能;混凝土中掺入1%体积比的钢纤维可显著提高墙板内混凝土的抗拉性能,使混凝土强度得到更加充分的利用,布置钢筋可以显著提高墙板延性;墙板的承载力和延性随内嵌钢板厚度和强度的增加而增大,强度为Q355、厚度为4、6mm时,墙板材料利用率更高。提出适用于该类墙板的轴压承载力设计公式,考虑钢板屈曲和截面组合效应的墙板轴心受压承载力设计公式计算结果较精确。 展开更多
关键词 钢板-混凝土组合剪力墙 夹芯保温 轴压性能 轴压承载力设计公式 结构保温一体化
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Collapse Patterns and Their Discrimination of Reinforced Concrete Shear Wall Under Combined Stresses of Compression and Shear due to Strong Earthquake 被引量:1
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作者 ZHA Zhixiang LIU Xila XU Bo 《Journal of Shanghai Jiaotong university(Science)》 EI 2020年第4期495-508,共14页
The collapse patterns of reinforced concrete(RC)shear walls under seismic load are proposed.The crack distribution and propagation of shear walls are specifically based on the failure criterions of Mohr-Coulomb with t... The collapse patterns of reinforced concrete(RC)shear walls under seismic load are proposed.The crack distribution and propagation of shear walls are specifically based on the failure criterions of Mohr-Coulomb with tension cutoff.Three zones and five different corresponding failure modes of RC shear walls are determined according to the transfer path of shear stress in shear wall.These failure modes of shear walls under seismic load are verified by many experimental results and can be utilized in collapsing analysis for frame-shear wall structure. 展开更多
关键词 reinforced concrete(RC) shear walls collapsing patterns seismic load
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钢板混凝土剪力墙拉弯剪性能试验研究 被引量:1
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作者 蒙春丽 柯晓军 +1 位作者 苏益声 梁胤鸿 《工程力学》 EI CSCD 北大核心 2024年第5期146-154,共9页
超高层建筑“细柔”特征容易引起底部剪力墙在强震下处于拉-弯-剪复合受力状态,中国《超限高层建筑工程抗震设防专项审查技术要点》(建质[2015]67号)建议墙肢采用配置型钢/钢板的方式来改善该种抗震性能,但缺乏相关试验研究。为此,进行... 超高层建筑“细柔”特征容易引起底部剪力墙在强震下处于拉-弯-剪复合受力状态,中国《超限高层建筑工程抗震设防专项审查技术要点》(建质[2015]67号)建议墙肢采用配置型钢/钢板的方式来改善该种抗震性能,但缺乏相关试验研究。为此,进行了6片钢板混凝土剪力墙的低周往复荷载试验,研究了轴拉比、含钢率及剪跨比对墙肢拉弯剪性能的影响。研究表明:拉弯剪作用引起钢板混凝土剪力墙密集的裂缝分布和显著的钢材强化,并导致其剪切-拉弯耦合破坏。轴拉比增大,墙肢承载力、初始抗侧刚度和延性分别降低22%、41%和39%;剪跨比减小,墙肢承载力和抗侧刚度至少提升23%;同时增大含钢率和降低剪跨比,墙肢延性提高10%。相比其他国家规范,中国规范对拉弯剪作用下钢板混凝土剪力墙的抗剪承载力预测效果更好,但其未能考虑高含钢率对裂面销栓力的影响,故建议采用暗柱的初始含钢率进行修正。 展开更多
关键词 钢板混凝土剪力墙 低周往复荷载 拉弯剪性能 剪切-拉弯耦合破坏 承载力
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集中配筋连接预制剪力墙抗震性能试验研究 被引量:1
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作者 肖扬 卢谦 +3 位作者 罗小勇 陈林松 程俊峰 张璧玮 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第1期201-218,共18页
针对现有预制混凝土剪力墙接缝施工容错率低、混凝土现场浇筑作业量大和钢筋锚固过长等不足,提出一种使用超高性能混凝土(UHPC)的集中配筋连接预制剪力墙。通过对比1片现浇剪力墙试件、3片不同接缝形式的集中配筋连接预制剪力墙试件的... 针对现有预制混凝土剪力墙接缝施工容错率低、混凝土现场浇筑作业量大和钢筋锚固过长等不足,提出一种使用超高性能混凝土(UHPC)的集中配筋连接预制剪力墙。通过对比1片现浇剪力墙试件、3片不同接缝形式的集中配筋连接预制剪力墙试件的拟静力试验结果,揭示该类预制剪力墙的破坏规律和抗震性能、竖缝对墙体抗震性能的影响和连接钢筋的受力特点。采用ABAQUS软件对试件进行有限元模拟,分析轴压比和集中配筋率对试件抗震性能的影响。研究结果表明:预制试件与现浇试件具有相同的破坏规律,均为弯剪破坏;这2类试件的滞回曲线均较饱满,骨架曲线走势基本一致,耗能能力接近,且预制试件的最小承载力仅比现浇试件低5.6%,表明预制试件的抗震性能与现浇试件的抗震性能基本相同;竖缝对剪力墙承载力的影响较小,使剪力墙的延性和耗能能力有一定的削弱;不同竖缝形式预制墙的抗震性能相近但各有特点,竖缝形式预制墙采用UHPC出筋搭接具有更好的整体性,采用U形键槽的预制墙具有更大的刚度和更强的耗能能力;连接钢筋的应力分布具有典型受弯构件的特征;随着轴压比增加,模型的刚度和承载力不断增加,在轴压比从0.05增加到0.30时,最大的峰值荷载增幅发生在轴压比从0.05到0.10时,从承载力的提高、刚度、耗能和墙角抬高等方面考虑,试件的集中配筋率保持在90%~110%为宜。 展开更多
关键词 预制剪力墙 集中配筋 拟静力试验 UHPC(ultra-high performance concrete) 抗震性能
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地震下RC空心墩弯-剪数值模型及混合试验验证
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作者 蒋雨润 梅竹 +2 位作者 刘洋 陈江 熊峰 《防灾减灾工程学报》 CSCD 北大核心 2024年第3期596-604,共9页
地震作用下钢筋混凝土空心截面中高桥墩多发生弯剪破坏,而其弯剪耦合反应的数值模拟方法尚不完善。针对当前弯剪串联模型中的剪切模型未考虑空心截面特征的问题,提出基于关键参数的剪切模型修正方法,并通过混合试验进行验证。分别从桥... 地震作用下钢筋混凝土空心截面中高桥墩多发生弯剪破坏,而其弯剪耦合反应的数值模拟方法尚不完善。针对当前弯剪串联模型中的剪切模型未考虑空心截面特征的问题,提出基于关键参数的剪切模型修正方法,并通过混合试验进行验证。分别从桥墩的剪跨比、混凝土开裂后剪切刚度、等效截面面积、桥墩有效高度与墩身混凝土斜裂缝倾角等参数入手,提出剪切模型关键参数的修正方法;基于修正的开裂剪切强度、开裂剪切位移、剪切极限承载力及其对应的剪切位移与剪切破坏位移,提出适用于空心桥墩剪切性能模拟的三折线型骨架曲线建立方法;通过组合剪切模型与基于纤维单元的弯曲模型,建立空心墩弯剪耦合反应的数值模型;与一座空心高墩桥混合试验结果对比,其桥墩子结构的物理试验结果验证了数值模拟方法。分析表明:通过本文所提数值模拟方法得到的空心桥墩弯剪滞回曲线与真实地震加载路径下的试验曲线匹配良好,能够模拟空心墩在真实地震作用下的弯剪滞回行为。 展开更多
关键词 钢筋混凝土空心墩 弯-剪耦合 剪切骨架模型 地震响应模拟 混合试验
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