框架剪力墙结构设计探讨

本文以西安某八层框架剪力墙结构为例，介绍了根据西安市抗震设防区划图及相应的地震动参数设计框架剪力墙结构的一些经验，对框架剪力墙结构体系的受力特性，剪力墙的平面及竖向布置，框架剪力墙结构的结构构造等提出了一些设计建议，并提出了平面整体表示法应注意的问题。     

底框砖房结构的应用和抗震性能分析

底框砖房的上层刚度较大，底层刚度较小。在地震作用时，易在房屋的底层产生“变形集中”，抗震性能较差。文章分析了低剪力墙在底框砖房中的应用特点，并提出在低剪力墙中设置型钢骨架，来改善剪力墙的 延性，从而使其抗震性能和抗震能力得到有效提高，可供底框 砖房抗震设计参考。     

开洞剪力墙抗震设计探讨

通过对一组开洞剪力墙进行弹塑性电算分析，进下探讨了开洞剪力墙结构弹塑性发展的一般规律，提出了开洞剪力墙结构的最佳抗震能量耗散机构，可作为结构抗震设计的参考依据。     

框架-剪力墙结构受力及抗震性能分析

为了满足多种建筑功能的要求，结合剪力墙结构和框架结构的优缺点，提出了框架-剪力墙结构，分析了框架与剪力墙协同工作的原理，对其结构受力性能进行了分析，详细探讨了框架-剪力墙结构的抗震性能，指出该体系改善了结构整体的受力性能，并提高了结构的抗震能力。     

延性剪力墙结构设计

通过剪力墙的破坏机理的分析和近几年的有关试验，本文介绍了连梁的剪压比限值反算法、上下双连梁法、带缝与开洞剪力墙、异形柱与短肢剪力墙、剪力墙结构计算与计算结果调整，从而确保剪力墙结构整体性，提高延性，增强结构抵御强烈地震的能力：     

短肢剪力墙结构抗震研究综述

本文围绕短肢剪力墙展开了相关研究，通过描述国外关于短肢剪力墙的综述，讲述了短肢剪力墙在我国地震状态下的抗震能力、布置时需要遵守的规则、地震状态下的计算方法，希望能为短肢剪力墙的抗震设计做出贡献。     

高层住宅短肢剪力墙结构的概念设计

阐述了短肢剪力墙结构体系的布置原则，介绍了常用结构分析程序的选择，对短肢剪力墙结构体系的计算结果作了分析，并对短肢剪力墙的抗震构造进行了探讨。     

钢筋混凝土剪力墙抗震性能分析

文中提出了基于结构性能的钢筋混凝土剪力墙抗震性能分析方法。构建抗震性能指标，更为简便、精确地表征各部件的工作状态。建立剪力墙结构分析模型，对钢筋混凝土剪力墙抗震性能进行评估与分析。结果表明，方法1相较于本文方法的最大位移少了0.310 mm，方法2相较于本文方法的最大位移减少了0.502 mm，因此，基于结构性能的钢筋混凝土剪力墙抗震性能分析方法能够有效控制该建筑的抗震性能，可应用在工程施工中。     

剪力墙结构延性设计

剪力墙结构是经常采用的结构型式。而剪力墙结构的延性对结构抗震非常重要。合理的设计可以使剪力墙结构具有良好的延性，并具有良好的抗地震能力。本文从五个方面论述了剪力墙结构的延性设计。     

影响框支剪力墙结构抗震性能的主要因素

目前，我国高层建筑抗震设计规范对框支剪力墙体系的结构设计有着非常严格的限制，文章对影响框支剪力墙结构抗震性能的各主要因素，如落地剪力墙数目，框支柱截面，框支层层数以及增大底盘对结构抗震性能的影响，用结构分析通用程序ＳＡＰ８４进行了计算，通过对计算结果的分析比较，论述了诸因素的对抗震性能影响的程度。     

变刚度框剪结构地震反应的层单元分析

构造能模拟一层框剪结构的层单元,用振型分解反应谱法分析不同高度和结构刚度特征值的断层剪力墙框剪结构的地震反应,设定可中断剪力墙高度的条件。计算表明,可中断剪力墙高度的决定因素为上部框架的抗剪能力,随着刚度特征值的增加,可中断剪力墙的高度随之增加,给出了两者之间的表达式,结构高度对中断剪力墙高度的影响较小。     

错列开洞钢筋混凝土剪力墙抗震性能数值模拟

为探究错列开洞剪力墙的抗震性能,通过有限元软件ABAQUS对错列开洞剪力墙抗震试验进行数值模拟,通过试验结果验证所建立精细化有限元模型的准确性。基于已验证的有限元模型开展参数分析,研究剪跨比、轴压比、开洞率以及有无附加纵筋等参数对错列开洞剪力墙抗震性能的影响。结果表明:不考虑轴压比时,剪跨比较大的剪力墙主要破坏于底部翼缘及墙体; 随着剪跨比的提高,剪力墙的峰值荷载减小,延性提高; 随着轴压比的提高,剪力墙的延性降低,峰值荷载先增加后减小,且峰值荷载的拐点在轴压比为0.2～0.5之间; 剪力墙的峰值荷载和延性随开洞率的提高而降低; 考虑附加纵筋时,若错列开洞剪力墙的开洞率较小且满足规范基本要求时,可以按照无洞口剪力墙计算其承载力; 考虑了附加纵筋影响的错列开洞剪力墙具有较好的承载力和延性,无附加纵筋的错列开洞剪力墙应力集中现象较严重; 开洞率较小时,剪力墙底部是薄弱区域,以剪切破坏为主; 开洞率较大时,剪力墙受到不协调的变形作用而发生破坏。     

Experimental study on seismic behavior of mid-rise RC shear wall with concealed truss

In this paper, mid-rise shear wall with concealed truss was proposed. This new composite shear wall includes two kinds of composition: one is the composition of two bearing systems, including truss and shear wall, and the other is the composition of two materials, including steel and concrete. Therefore, it is a double composite shear wall. The experimental study on the seismic behavior of six 1/3 scale mid-rise shear walls, including an ordinary mid-rise shear wall, a mid-rise shear wall with steel frame, and four mid-rise shear wall with concealed truss made of different materials, was studied. Based on the experimental study, the stiffness and its attenuation, bearing capacity, ductility, hysteretic property, energy dissipation, and failure phenomena of each shear wall were contrastively analyzed. The formulas of bearing capacity and stiffness were established. The results obtained from the formulas and those from experiment are in good agreement. Some suggestions for seismic design of shear wall are given in this paper. The experimental results show that the seismic behavior of the mid-rise shear wall with steel frame and that of every truss with different materials is obviously improved.     

新型装配式中空剪力墙抗震性能研究

为检验一种新型装配式中空剪力墙的抗震性能,采用数值模拟的方法,建立了3种孔洞宽度不同的单片装配式中空剪力墙结构模型及一片装配式实心剪力墙结构模型,通过对比装配式中空剪力墙模型与实心剪力墙模型在低周往复荷载下的模拟试验结果,研究装配式中空剪力墙结构在地震作用下的抗震性能。研究结果表明,相比实心剪力墙,中空剪力墙滞回曲线的形状、饱满程度基本一致,具有较强的抗震性能;随着墙体孔洞宽度的增大,中空剪力墙的承载力与刚度下降,但下降幅度不大,这种中空剪力墙可以作为非加强层的装配式剪力墙使用。本研究对装配式剪力墙结构的发展具有一定的借鉴意义。     

不同竖向钢筋连接方式对装配式剪力墙抗震性能的影响

对3片钢筋混凝土剪力墙试件进行低周往复加载试验,其中1片为现浇剪力墙试件,其余2片为竖向钢筋采用不同连接方法的装配式剪力墙试件。结果表明:装配式剪力墙试件与现浇剪力墙试件相比,其破坏模式有所区别,现浇剪力墙试件表现为弯剪破坏,其余2片装配式剪力墙试件表现为弯曲破坏;采用镀锌波纹管浆锚搭接和采用U型套箍搭接的连接方式传递钢筋应力效果良好,且采用这两种连接方式的试件的位移延性系数和承载力比现浇剪力墙试件更高,刚度和现浇剪力墙试件相当,但耗能能力低于现浇剪力墙试件;基于试验数据,对装配式剪力墙的进一步研究提出了建议,同时通过ABAQUS软件进行有限元分析并对试验结果进行验证,有限元模拟结果与试验结果基本吻合。     

带构造边缘构件的L形双面叠合剪力墙抗震性能试验研究

为研究装配整体式叠合剪力墙结构体系中带构造边缘构件的L形截面双面叠合剪力墙的抗震性能,开展了轴压比为0.2的1片L形双面叠合剪力墙足尺试件和1片现浇剪力墙足尺对比试件的拟静力抗震试验,根据试验数据对比分析了试件的各项抗震性能指标。结果表明:叠合剪力墙与现浇剪力墙均呈现典型的弯剪破坏特征; 极限破坏时,L形剪力墙腹板墙肢构造边缘构件的底部区域混凝土被压碎,纵筋屈服或被拉断; 叠合剪力墙翼缘受拉时的正向受弯承载力比现浇墙低14.6%,翼缘受压时的反向受弯承载力比现浇墙低9.2%; 正向加载时,叠合剪力墙的初始刚度比现浇墙大,屈服后刚度退化速度快; 反向加载时,叠合剪力墙的初始刚度及刚度退化规律与现浇墙基本一致; L形现浇构造边缘构件与叠合墙板交界处采用的另设钢筋搭接连接方式具有良好的传力性能; L形双面叠合剪力墙的抗震性能与现浇墙相比有一定差距,建议提高构造边缘构件的配筋率。     

Experimental study on seismic behavior of mid-rise RC shear wall with concealed truss

In this paper, mid-rise shear wall with concealed truss was proposed. This new composite shear wall includes two kinds of composition: one is the composition of two bearing systems, including truss and shear wall, and the other is the composition of two materials, including steel and concrete. Therefore, it is a double composite shear wall. The experimental study on the seismic behavior of six 1/3 scale mid-rise shear walls, including an ordinary mid-rise shear wall, a mid-rise shear wall with steel frame, and four mid-rise shear wall with concealed truss made of different materials, was studied. Based on the experimental study, the stiffness and its attenuation, bearing capacity, ductility, hysteretic property, energy dissipation, and failure phenomena of each shear wall were contrastively analyzed. The formulas of bearing capacity and stiffness were established. The results obtained from the formulas and those from experiment are in good agreement. Some suggestions for seismic design of shear wall are given in this paper. The experimental results show that the seismic behavior of the mid-rise shear wall with steel frame and that of every truss with different materials is obviously improved.     

Efficient structural analysis of wall–frame structures

In this study, an efficient analytical model for the dynamic analysis of tall buildings with a shear wall–frame structural system has been proposed. A shear wall–frame structural system usually consists of a core wall showing flexural behavior and a frame presenting shear behavior. Therefore, the deformed shape of the shear wall–frame structural system is shown by the combination of flexural mode and shear mode. To consider this characteristic in developing an efficient analytical model, the effect of shear wall and frame on the dynamic behavior of a tall building with a dual system has been separately investigated. In order to consider the effect of the shear wall in the frame model without shear wall, a rigid body was used instead of the shear wall. Each equivalent model for the separated shear wall part and frame part has been independently developed, and two equivalent models were then combined to create an efficient analytical model for tall buildings with a shear wall–frame structural system. In order to verify the efficiency and accuracy of the proposed method, time history analyses of tall buildings with a shear wall–frame system were performed. With analytical results, it has been confirmed that the proposed method can provide accurate results with significantly reduced computational time and memory. Copyright © 2013 John Wiley & Sons, Ltd.     

Experimental study on shear behavior of two‐way hollow core precast panel shear wall with vertical connection

The two‐way hollow core precast panel (TWHCPP) exhibits good seismic performance. In this study, the shear behavior of the TWHCPP shear wall with vertical connections was investigated. Specifically, five shear wall specimens, which comprised one cast‐in‐place shear wall, one TWHCPP shear wall without vertical connections, and three TWHCPP shear walls with vertical connections, were investigated experimentally. The TWHCPP shear walls were also modeled through numerical simulation. The experimental and numerical results indicate that the TWHCPP shear wall specimens with vertical connections exhibit monolithic load‐bearing mechanisms before the peak point, which is similar to the cast‐in‐place shear wall specimen. When the peak point of the TWHCPP shear wall specimen was attained, vertical slits were formed in the vertical connection and major vertical crack regions, which divided the shear wall panel into multiple vertical concrete straps. Subsequently, the load‐bearing mechanism of the TWHCPP shear wall transformed to multiple vertical concrete straps working cooperatively with transverse reinforcements. Therefore, the brittle diagonal tension failure mode could be avoided, and a good hysteretic performance could be achieved. The outcomes of this study are expected to provide a useful reference for the application of the TWHCPP shear wall.     

异形柱框-剪结构中剪力墙刚度变化对柱内力的影响

利用异形柱框架 剪力墙结构协同工作的基本微分方程 ,给出异形柱框架楼层剪力与框 剪结构刚度特征值的关系 ,分析在中高层异形柱框架 剪力墙结构设计中 ,改变剪力墙的弯曲刚度对异形柱框架楼层剪力的影响 ,并通过算例说明调整剪力墙数量和优化剪力墙抗侧刚度时异形柱内力 (剪力和轴力 )的变化情况。