共查询到20条相似文献，搜索用时 171 毫秒
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再生混凝土高剪力墙抗震性能试验研究 总被引：4，自引：1，他引：3
再生混凝土剪力墙适用于多层住宅结构.为了研究再生混凝土剪力墙和再生混凝土带暗支撑剪力墙的抗震性能,进行了5个剪跨比为2.0的高剪力墙的低周反复荷载试验研究.试验模型包括:1个用作比较的普通混凝土高剪力墙,3个再生混凝土高剪力墙,1个再生混凝土带暗支撑高剪力墙.分析了其承载力、刚度及其退化过程、耗能、延性、破坏特征和破坏机制等.试验表明:与普通混凝土高剪力墙相比,再生混凝土高剪力墙的抗震性能略差;随着再生骨料掺量的增加,再生混凝土高剪力墙的抗震性能呈下降趋势;这种再生混凝土高剪力墙,经过合理设计可以满足多层剪力墙住宅结构抗震要求. 相似文献
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进行了3个1/3缩尺的中高剪力墙的抗震性能试验研究,包括1个混凝土中高剪力墙、1个内藏钢框架组合中高剪力墙和1个内藏钢桁架组合中高剪力墙。在试验研究基础上,对比分析了各剪力墙的刚度及其衰减过程、承载力、延性、滞回特性及破坏特征。试验表明:内藏钢框架混凝土组合中高剪力墙的抗震性能比普通混凝土中高剪力墙明显提高;内藏钢桁架混凝土组合中高剪力墙的抗震性能比普通混凝土中高剪力墙显著提高。 相似文献
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型钢混凝土剪力墙的抗震性能研究 总被引：2，自引：1，他引：1
型钢混凝土剪力墙(亦称为SRC剪力墙)是一种新型的剪力墙,其抗弯承载力、抗剪承载力及延性均好于普通剪力墙。本文简要总结了近年来国内外关于型钢混凝土剪力墙抗震研究的成果。在此基础上,进行了较高轴压比下内藏钢桁架混凝土组合高剪力墙的抗震性能试验研究。试验研究表明,内藏钢桁架的存在明显改善了高轴压比下型钢混凝土高剪力墙的抗震性能。 相似文献
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带暗支撑双肢短肢剪力墙抗震性能试验研究 总被引：4，自引：1，他引：4
钢筋混凝土短肢剪力墙结构是一种新型的中高层住宅结构体系,已有较多的工程应用,但是短肢剪力墙的抗震性能较差,如何提高短肢剪力墙的抗震性能是目前工程界十分关注的问题。本文提出了带暗支撑短肢剪力墙,并以典型的双肢短肢剪力墙为例,选择了4个1/3缩尺的双肢短肢剪力墙试验模型,2个为普通双肢短肢剪力墙模型,2个为带暗支撑双肢剪力墙模型,进行了对比性的抗震性能试验研究,较系统地分析了带暗支撑双肢短肢剪力墙的承载力、刚度、延性、耗能能力及破坏特征,建立了承载力计算模型,计算结果与实测结果符合较好。试验表明,带暗支撑双肢短肢剪力墙的抗震能力比普通双肢短肢剪力墙显著提高。 相似文献
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进行了3个1∶4缩尺的四层双肢剪力墙模型抗震性能的对比试验,连梁跨高比为1.5。模型1为普通混凝土双肢剪力墙,模型2为全再生混凝土双肢剪力墙,模型3为底部两层普通混凝土、上部两层再生混凝土双肢剪力墙。分析了各双肢剪力墙的承载力、延性、刚度、滞回特性、耗能及破坏特征。结果表明:与普通混凝土双肢剪力墙相比,全再生混凝土双肢剪力墙的抗震性能略差,底部两层普通混凝土、上部两层再生混凝土的双肢剪力墙与普通混凝土双肢剪力墙抗震性能接近。建立了再生混凝土双肢剪力墙的承载力计算模型,计算结果与试验结果吻合较好。 相似文献
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型钢混凝土低矮剪力墙抗震性能试验研究 总被引：4，自引：2，他引：2
剪力墙构件是现代高层建筑结构中的主要抗侧向力构件.为了对比型钢桁架混凝土组合低矮剪力墙与型钢框架混凝土组合低矮剪力墙以及普通钢筋混凝土低矮剪力墙在地震作用下的抗震性能,本文进行了四榀1/4缩尺模型的低矮混凝土剪力墙在单调和低周反复荷载作用下的对比试验,其中单调加载试验包括一榀内置型钢桁架的型钢混凝土组合低矮剪力墙,反复加载试验包括一榀普通钢筋混凝土低矮剪力墙、一榀内置型钢框架的型钢混凝土低矮剪力墙和一榀内置型钢桁架的型钢混凝土低矮剪力墙,给出了各试件的刚度、承载力、变形、延性和破坏形态等试验结果,并对其进行分析.试验结果表明,在这三种墙体中,型钢桁架混凝土组合低矮剪力墙的承载力、变形能力、耗能能力较其他类型剪力墙好,并为型钢桁架混凝土组合低矮剪力墙在实际中的应用提供了试验依据. 相似文献
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钢筋混凝土剪力墙弹塑性分析方法 总被引：15，自引：3，他引：12
钢筋混凝土剪力墙弹塑性分析可以采用微观方法和宏观方法,本文对这些方法进行了介绍和比较,尤其是对于剪力墙的宏观有限元模型进行了较详细的论述,指出了各自的优缺点。认为如果对高层剪力墙结构进行分析,应尽可能采用宏观方法,而对于宏观剪力墙模型的选取是至关重要的。在此基础上提出了一些有益的建议。 相似文献
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板柱-剪力墙结构的动力特性分析 总被引：1，自引：0，他引：1
采用有限元方法，改变结构的跨度和层数，对无边梁的板柱-剪力墙结构、带边梁的板柱-剪力墙结构和框架-剪力墙结构的动力特性进行对比分析。指出水平荷载作用下无边梁的板柱-剪力墙结构的侧移曲线是弯曲型的，而带边梁的板柱-剪力墙结构的侧移曲线是弯剪型，并且边梁可以有效提高板柱-剪力墙结构侧向刚度。 相似文献
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梁柱-板柱组合结构(住宅)体系模型振动台试验研究 总被引：2，自引：0，他引：2
梁柱-板柱组合结构(住宅)体系由上部大开间板柱结构和底部框架结构构成，是一种可持续发展的新型结构形式。通过两个12层l：15模型的振动台对比试验，探讨其动力特性、地震反应和破坏情况。试验表明，该体系的抗震性能介于框架结构和板柱结构之间。总层数在12层以下时，不设剪力墙的该体系在7度区基本上满足规范要求，合理设置剪力墙后可用于8度区。 相似文献
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This paper presents a method of analysis capable of calculating the response of an R/C coupled shear wall structure subjected to strong earthquake motion without major complications existing in the method itself. The relative simplicity is achieved while retaining reasonable reliability in the computed response. The reliability of the computed results are tested against 1- the measured responses of a cantilever column member and a 6-storey coupled shear wall system under static cyclic lateral loads; and 2- the measured responses of two coupled shear wall structures which were subjected to simulated earthquake motions on the University of Illinois Earthquake Simulator. The effects of moment-axial force interaction in the wall members on the computed overall responses of the coupled shear wall structures and on the behaviour of each individual wall are discussed. 相似文献
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钢筋混凝土带暗支撑低矮剪力墙非线性有限元分析 总被引：10，自引：1，他引：10
在试验研究基础上，采用ANSYS有限元分析程序，对钢筋混凝土带暗支撑低矮剪力墙在单向加载下的性能作了非线性分析，从理论计算角度进一步了解其在水平荷载作用下的开裂，变形及破坏全过程，有限元分析与试验结果符合较好。 相似文献
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A beam–column‐type finite element for seismic assessment of reinforced concrete (R/C) frame structures is presented. This finite element consists of two interacting, distributed flexibility sub‐elements representing inelastic flexural and shear response. Following this formulation, the proposed model is able to capture spread of flexural yielding, as well as spread of shear cracking, in R/C members. The model accounts for shear strength degradation with inelastic curvature demand, as well as coupling between inelastic flexural and shear deformations after flexural yielding, observed in many experimental studies. An empirical relationship is proposed for evaluating the average shear distortion of R/C columns at the onset of stirrup yielding. The proposed numerical model is validated against experimental results involving R/C columns subjected to cyclic loading. It is shown that the model can predict well the hysteretic response of R/C columns with different failure modes, i.e. flexure‐critical elements, elements failing in shear after flexural yielding, and shear‐critical R/C members. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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The paper focusses on seismic damage analysis of reinforced concrete (R/C) members, accounting for shear–flexure interaction
in the inelastic range. A finite element of the beam-column type recently proposed by the writers for the seismic analysis
of R/C structures is first briefly described. The analytical model consists of two distributed flexibility sub-elements which
interact throughout the analysis to simulate inelastic flexural and shear response. The finite element accounts for shear
strength degradation with inelastic curvature demand, as well as coupling between inelastic flexural and shear deformations
after flexural yielding. Based on this model, a seismic damage index is proposed taking into account both inelastic flexural
and shear deformations, as well as their interaction. The finite element and the seismic damage index are used to analyse
the response of R/C columns tested under cyclic loading and failing either in shear or in flexure. It is shown that the analytical
model and damage index can predict and describe well the hysteretic response of R/C columns with different types of failure. 相似文献
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Modelling of R/C members accounting for shear failure localisation: Hysteretic shear model 
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下载免费PDF全文 Reinforced concrete (R/C) frame buildings designed according to older seismic codes represent a large part of the existing building stock worldwide. Their structural elements are often vulnerable to shear or flexure‐shear failure, which can eventually lead to loss of axial load resistance of vertical elements and initiate vertical progressive collapse of a building. In this study, a hysteretic model capturing the local shear response of shear‐deficient R/C elements is described in detail, with emphasis on post‐peak behaviour; it differs from existing models in that it considers the localisation of shear strains after the onset of shear failure in a critical length defined by the diagonal failure planes. Additionally, an effort is made to improve the state of the art in post‐peak shear response modelling, by compiling the largest database of experimental results for shear and flexure‐shear critical R/C columns cycled well beyond the onset of shear failure and/or up to the onset of axial failure, and developing empirical relationships for the key parameters defining the local backbone post‐peak shear response of such elements. The implementation of the derived local hysteretic shear model in a computationally efficient beam‐column finite element model with distributed shear flexibility, which accounts for all deformation types, will be presented in a companion paper. 相似文献
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Modelling of R/C members accounting for shear failure localisation: Finite element model and verification 下载免费PDF全文
下载免费PDF全文 Reinforced concrete (R/C) frame buildings designed according to older seismic codes represent a large part of the existing building stock worldwide. Their structural elements are often vulnerable to shear or flexure‐shear failure, which can eventually lead to loss of axial load resistance of vertical elements and initiate vertical progressive collapse of a building. In this study, a computationally efficient member‐type finite element model for the hysteretic response of shear critical R/C frame elements up to the onset of axial failure is presented; it accounts for shear‐flexure interaction and considers, for the first time, the localisation of shear strains, after the onset of shear failure, in a critical length defined by the diagonal failure plane. Its predictive capabilities are verified against experimental results of column and frame specimens and are shown to be accurate not only in terms of total response, but also with regard to individual deformation components. The accuracy, versatility, and simplicity of this finite element model make it a valuable tool in seismic analysis of complex R/C buildings with shear deficient structural elements. 相似文献