钢—砼组合连梁与砼剪力墙节点抗震性能试验研究

【作者】 陈康华；

【导师】 阎奇武；

【作者基本信息】 中南大学 ， 结构工程， 2008， 硕士

【摘要】 近年来,钢—混凝土组合结构在我国的高层建筑中得到了较为广泛的应用,目前相关的研究主要集中在该种结构体系在地震作用下结构层间相对位移控制、罕遇地震作用下结构破坏形态等方面,对这种结构体系的抗震薄弱位置(如钢—砼组合连梁与砼剪力墙连接节点)的研究则不够全面。本文在前人研究的基础上,结合我国的实际情况,对2个足尺平面内钢—混凝土组合梁与混凝土剪力墙强节点试件进行了低周反复荷载试验,对其在低周反复荷载作用下的破坏机理和抗震性能进行了研究,内容主要集中在以下几个方面:1)在总结已有的节点研究成果的基础上,运用力学、RC结构非线性等基本理论,对组合节点进行初步的理论分析,提出组合节点的试验方案,进行了2个足尺平面内钢—混凝土组合连梁与混凝土剪力墙强节点的低周反复荷载试验。2)根据试验现象及理论分析,研究节点试件在梁端低周反复荷载作用下的破坏形态、滞回曲线特性、刚度变化、延性性能、耗能能力、关键部位的应变分布情况及节点核心区的受力情况。3)讨论了轴压比(n)对这种新型组合节点试件抗震性能的影响,轴压比对强节点构件的延性和耗能影响不大。4)基于试验研究结果,初步分析了强节点核心区剪切变形、耗能性能,做出了强节点域滞回曲线。5)为了进行抗震分析,需要把试验所得到滞回曲线加以模型化,使之能更理想化地反应出构件在地震荷载作用下位移和力的关系,考虑了强度和刚度的退化规律,根据试验数据和回归分析,提出节点试件的骨架曲线模型和恢复力模型。更多还原

【Abstract】 In recent years, the steel-concrete hybrid structure is extensively applied to the high rised buildings in our country. But, the research works mostly concentrate on these aspects such as the control of the comparatively displacement of structure floors under the earthquake action and the damage shape of structure when it suffer the rare earthquake etc,the research on the weakness point(such as the conjunction node of steel-concrete composite coupling beam and reinforced concrete wall) of this structure system is not comprehensive.On the basis of the former researches and taking into account the practice of our country, this paper take the low period repeat loading experiment for two full scale the strongle node of steel-concrete composite coupling beam and reinforced concrete shear wall in the plane, researching their failure patterns and seismic behavior under the low period repeat loading action,the main content concentrate on the following aspects:1) Based on the summary research results in the past, applying theory such as mechanics, RC structure non-linear and so on to preliminarily theoretically analyzes steel-concrete composite coupling beam joint, and propose the joint experimental plan, and carries on two full scale steel-concrete composite coupling beam and concrete shear wall strongly joint test in the plan under the low period repeat loading action.2) According to the experimental phenomenon and the theoretical analysis, researching two joint’s failure pattern、hysteretic curve、charge of rigidity、durability、energy dissipation capacity、the strain of the key position and the moment transferring mechanism.3) The axial load ratio (n) are discussed, which influenced the earthquake resistance perfoumance of this new type of steel-concrete composite joints. Axial compression ratio was little effected on the ductility and energy dissipation capacity of strong nodes component.4) Base on the test results, preliminarily analyzes shear deformation of joint and energy dissipation capacity, hysteresis curve of connection region was plotted.5 ) In order to carry on the earthquake resistance analysis, it needs to be modeling the hysteresis curve which obtain from the laboratory data, enables it more ideally to respond the component the displacement-load relations under the earthquake load action, and considers the strength and the stiffness degenerated rule, according to the tentative data and the regression analysis, proposes the joint skeleton curve model and the resiliency model.更多还原