【作者】 杜静；

【导师】 白绍良；

【作者基本信息】 重庆大学 ， 结构工程， 2004， 硕士

【摘要】 钢筋混凝土剪力墙是高层建筑结构中的关键构件,在抗震剪力墙结构、框架——剪力墙结构和框架——核心筒结构中 ,既起着保证侧向刚度的作用,又起着提供基本抗震能力和参与耗散地震能量的作用。为了保证在按延性思路设计的结构中剪力墙能具有良好的延性性能,就必须保证它在达到预计的强震非弹性反应之前不出现剪切破坏,因此,规定合理的抗震抗剪能力计算公式就成为延性结构剪力墙抗震设计中的关键措施。到目前为止,我国《混凝土结构设计规范》GBJ50010-2002中,对于抗震剪力墙规定的抗剪公式是在非抗震剪力墙抗剪性能试验的基础上经专家裁定给出的,未进行过任何抗震剪力墙的抗剪性能试验,也未收集和参考国外相应的试验结果,为了改善我国规范在抗震关键构件——剪力墙抗剪设计中的这一薄弱环节,重庆大学土木工程学院在规范第六批研究课题中承担了抗震剪力墙抗剪性能研究的项目。本论文的研究工作即属于该研究项目的部分内容。本论文首先对世界各国关于钢筋混凝土结构构件的抗剪机理的模型化及规范抗剪设计方法做了一个较为全面的综述,为今后进一步研究包括剪力墙在内的钢筋混凝土结构构件的抗剪性能打下了坚实的基础。针对本课题的研究内容,本论文对到目前为止世界各国关于钢筋混凝土剪力墙抗剪性能的试验研究及分析模型研究成果按时间顺序做出的综述对今后进一步的研究工作有一定的参考价值。本论文首次引入加拿大多伦多大学Vecchio教授组织编制的基于斜压场理论的专门针对钢筋混凝土的二维有限元非线性分析程序VecTor2作为研究工具,并进行了初步探索。发现,VecTor2可以作为有效的分析手段,可以在试验前试件设计阶段对试验进行有力的控制,在试验后对试验试件进行有效的模拟和补充分析。论文最后还将试验结果与分析结果各国规范提出的抗剪公式(不考虑可靠度因素)作了对比,得出了一些有倾向性的看法。更多还原

【Abstract】 Reinforce concrete shearwalls are critical members in modern high-rise buildings. In the seismic structural wall systems, Frame-wall systems and the frame-core systems, walls are important for ensuring lateral stiffness, contributing to basic earthquake resistance and dissipating energy. In order to ensure the ductile behavior of walls in structures designed according to ductility concept, shear failure should be excluded before walls response nonelastically in the great ground shaking as expected. Therefore, in the seismic design of ductile wall systems, it is critical to definite appropriate formula calculating seismic shear capacity. Until recently, without any tests on the seismic shear behavior of walls or refer to any relevant test abroad, the formula calculating seismic shear capacity of walls in Chinese Code <Code for design of concrete structures> GB 50010-2002 are only developed based on the tests of shear behaviors of nonseismic walls, being judged by professionals. In order to improve the weakness in the shear design of critical members resisting earthquakes——shearwalls, the Civil Engineering College of Chongqing University undertake the project of investigation on shear behaviors of seismic shearwalls in the 6th batch of research subject on Code. This thesis is part of the project.The thesis begins with a comprehensive overview of the modeling of shear behaviors and code shear design provisions of reinforced concrete structural elements in different countries, which may be useful for the further investigation about the shear behavior of reinforced concrete structural members including shearwalls.According to the subject, the thesis gives a review over the experimental and analytical research work in time sequence, which may be useful for further investigations.A program based on the Modified Compression Field Theory for nonlinear finite element analysis of reinforced concrete members,which was developed by Professor Vecchio’s research group at the University of Toronto in Canada, is for the first time introduced and tested. It is found that VecTor2 should work effectively as analysis aids, for predicting and controlling in the stage of specimens designing before tests, for modeling and additional analyzing after tests. <WP=6>At the end of the thesis, comparisons on the test results and the values predicted by different codes (not considering degree of reliability) are carried out to arrive at some orientational point of view.更多还原