【作者】 杨鹏辉；

【导师】 梁兴文；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2009， 硕士

【摘要】 为了改善高性能混凝土剪力墙的延性,按性能设计理论,在剪力墙截面两端设置端柱,并在构件的塑性铰区采用分段约束高强箍筋,设计了6个带端柱高性能混凝土剪力墙试件,进行了拟静力试验;对其破坏形态、滞回特性、变形能力、刚度退化、耗能能力、截面应变等进行了研究。根据试验结果,给出了高性能混凝土剪力墙在使用良好、生命安全和防止倒塌三个性能水平对应的层间位移角的分布范围和平均值;分析了轴压比、剪跨比、约束箍筋数量及范围等因素对剪力墙的延性、耗能能力和破坏形态的影响。研究结果表明,三个性能水平对应的层间位移角与构件的损伤程度有较好的相关性,可以用作这种构件的性能指标;设置端柱并根据轴压比和位移延性需求确定的分段约束箍筋数量和范围,可以明显改善高性能混凝土剪力墙的脆性,使高性能混凝土剪力墙的延性指标达到设计要求。在带端柱高性能混凝土剪力墙试验研究的基础上,利用宏观有限元分析程序CANNY,建立了带端柱高性能混凝土剪力墙的力学模型,数值仿真了试件的反复水平加载试验过程,理论结果与试验结果进行相互验证、修正。通过理论分析和计算,研究了设置约束边缘构件的普通混凝土剪力墙轴压比限值,可供修订规范时参考;在利用CANNY程序进行非线性分析的基础上,数值仿真计算了带端柱高性能混凝土剪力墙的轴压比限值,为研究工作和工程设计提供参考。更多还原

【Abstract】 According to performance-based seismic design theory,six specimens of high performance concrete shear wall with boundary columns and several high strength rings like a chain along boundary element in the potential plastic region were designed and the quasi-static tests were carried out.Seismic performance such as failure pattern, hysteretic property,displacement ductility,rigidity degeneration,energy dissipation and section strain etc were investigated.Through the analysis of tests,the mean value and distribution of the story drift ratio for three performance levels,namely serviceability, life-safety and collapse protection,are presented.The influence of the axial load ratio, the shear span ratio,the amount and range of confinement reinforcement on the ductility, the capacity of energy dissipation and failure pattern were analyzed.The study shows that the story drift ratio,which is close correlative with the damage levels of members, can be used as the performance indexes of the members.In addition,setting boundary columns,and the amount and range of the several rings along boundary element determined by the axial load ratio and displacement ductility demand were demonstrated to be valid,and the ductility level of the high performance concrete shear wall met the demands of design.On the basic research and analysis of high performance concrete shear wall with boundary columns,the mechanical model of it are set up by using the non-linear analysis program CANNY,simulating the repeated loading test process,theoretical results and the experimental results are contrasted mutually.Through theoretical analysis and calculations,the allowable axial load ratio of concrete shear wall with confined boundary elements is studied,it can be used for revising the design code;using the non-linear analysis program CANNY,based on the numerical simulation with high performance concrete shear wall with boundary columns,the allowable axial load ratio of it is analysed,providing a reference to the study and design work.更多还原