偏心支撑式钢板剪力墙抗震性能研究
发布时间：2018-07-16 09:23
【摘要】：偏心支撑结构是一种高烈度地震区高层建筑钢结构良好的水平抗侧力体系，但在强烈地震作用下，耗能梁段会产生过大的剪切塑性变形，导致混凝土楼板严重破坏，修复难度较大。本文针对偏心支撑结构存在的问题，提出了一种在X型偏心支撑中间内置钢板剪力墙的新型结构形式——偏心支撑式钢板剪力墙，并利用有限元分析软件ANSYS分析研究了偏心支撑式钢板剪力墙的抗震性能，主要的研究内容及结论如下： （1）利用有限元ANSYS软件模拟了两层D形偏心支撑钢框架的拟静力试验，主要从滞回曲线、骨架曲线和应力分布方面与试验结果进行了对比分析。有限元结果与试验结果吻合良好，为后续偏心支撑式钢板剪力墙的研究提供了依据。 （2）分别从单调加载曲线、滞回曲线、骨架曲线、耗能系数、应力分布与变形五方面对偏心支撑式钢板墙结构与X形偏心支撑钢框架结构进行了系统的、深入的对比分析，分析结果表明：偏心支撑式钢板剪力墙结构不仅可以有效地保证斜支撑不发生屈曲，而且还可以减小耗能梁段的塑性变形，从而减小混凝土楼板的破坏程度；同时它具有较大的承载力和优越的耗能能力。 （3）通过改变中心钢板剪力墙的大小，设计了3个不同参数的偏心支撑式钢板剪力墙，进行单调加载和循环加载的研究，对比分析了单调加载曲线、滞回曲线、骨架曲线及耗能系数。分析结果表明：承载力随着中心钢板墙的尺寸的减小而下降，但下降幅度不大，仅在10%以内；中心钢板剪力墙的大小取结构外框架尺寸的1/3倍时，结构的承载力和耗能能力较好。 （4）通过改变耗能梁段的长度，设计了5个不同参数的偏心支撑式钢板剪力墙，进行单调加载和循环加载的研究，，对比分析了单调加载曲线、滞回曲线、骨架曲线及耗能系数。分析结果表明：剪切屈服型的耗能梁段相比弯曲屈服型耗能梁段，对结构的抗震性能更有利；耗能梁段的长度在1.0M p V p~1.3M p V p范围内时，结构的承载力和耗能能力较好。 （5）通过改变内填钢板的高厚比，设计了5个不同参数的偏心支撑式钢板剪力墙，对比分析了滞回曲线、骨架曲线及耗能系数。分析结果表明：内填钢板的高厚比取200时，结构的承载力和耗能能力均较好。
[Abstract]:Eccentrically braced structure is a kind of good horizontal lateral force resisting system of steel structure of high-rise building in high intensity earthquake area. However, under the action of strong earthquake, the energy dissipation beam section will produce too large shear plastic deformation, which will lead to serious damage of concrete floor. It is difficult to repair. Aiming at the problems of eccentrically braced structure, a new type of steel plate shear wall, eccentrically supported steel plate shear wall, is put forward in this paper, which is built in the middle of X-type eccentrically braced steel plate shear wall. The seismic behavior of eccentrically braced steel plate shear wall is studied by finite element analysis software ANSYS. The main research contents and conclusions are as follows: (1) Quasi-static test of two-story D-shaped eccentrically braced steel frame is simulated by using finite element ANSYS software, mainly from hysteretic curve. The skeleton curve and stress distribution are compared with the experimental results. The finite element results are in good agreement with the experimental results, which provides a basis for the further study of eccentrically braced steel plate shear walls. (2) from the monotone loading curve, hysteretic curve, skeleton curve, energy dissipation coefficient, respectively. In this paper, the stress distribution and deformation of eccentrically braced steel plate wall structure and X-shaped eccentrically braced steel frame structure are systematically compared and analyzed. The results show that the eccentrically braced steel plate shear wall structure not only can effectively ensure that the oblique bracing does not occur buckling, but also can reduce the plastic deformation of the energy-dissipation beam, thus reducing the failure degree of concrete floor. At the same time, it has great bearing capacity and superior energy dissipation ability. (3) by changing the size of the central steel plate shear wall, three eccentrically braced steel plate shear walls with different parameters are designed to study the monotonic loading and cyclic loading. The monotone loading curve, hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the bearing capacity decreases with the decrease of the size of the central steel plate wall, but the decrease is not significant, which is less than 10%, and when the size of the central steel plate shear wall is 1 / 3 times the size of the outer frame of the structure, The bearing capacity and energy dissipation capacity of the structure are good. (4) by changing the length of the energy dissipation beam section, five eccentrically braced steel plate shear walls with different parameters are designed to study the monotone loading and cyclic loading. The monotone loading curve, hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the shear yield beam section is more favorable to the seismic performance of the structure than the bending yield type energy dissipation beam section, and when the length of the energy dissipation beam section is within the range of 1.0 m p V V and 1.3 m p V p p, the shear yield type beam segment is more favorable to the seismic performance of the structure than that of the bending yield type beam section. (5) five eccentrically braced steel plate shear walls with different parameters are designed by changing the ratio of height to thickness. The hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the bearing capacity and energy dissipation capacity of the structure are better when the ratio of height to thickness is 200.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.13;TU973.31
本文编号：2125943
[Abstract]:Eccentrically braced structure is a kind of good horizontal lateral force resisting system of steel structure of high-rise building in high intensity earthquake area. However, under the action of strong earthquake, the energy dissipation beam section will produce too large shear plastic deformation, which will lead to serious damage of concrete floor. It is difficult to repair. Aiming at the problems of eccentrically braced structure, a new type of steel plate shear wall, eccentrically supported steel plate shear wall, is put forward in this paper, which is built in the middle of X-type eccentrically braced steel plate shear wall. The seismic behavior of eccentrically braced steel plate shear wall is studied by finite element analysis software ANSYS. The main research contents and conclusions are as follows: (1) Quasi-static test of two-story D-shaped eccentrically braced steel frame is simulated by using finite element ANSYS software, mainly from hysteretic curve. The skeleton curve and stress distribution are compared with the experimental results. The finite element results are in good agreement with the experimental results, which provides a basis for the further study of eccentrically braced steel plate shear walls. (2) from the monotone loading curve, hysteretic curve, skeleton curve, energy dissipation coefficient, respectively. In this paper, the stress distribution and deformation of eccentrically braced steel plate wall structure and X-shaped eccentrically braced steel frame structure are systematically compared and analyzed. The results show that the eccentrically braced steel plate shear wall structure not only can effectively ensure that the oblique bracing does not occur buckling, but also can reduce the plastic deformation of the energy-dissipation beam, thus reducing the failure degree of concrete floor. At the same time, it has great bearing capacity and superior energy dissipation ability. (3) by changing the size of the central steel plate shear wall, three eccentrically braced steel plate shear walls with different parameters are designed to study the monotonic loading and cyclic loading. The monotone loading curve, hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the bearing capacity decreases with the decrease of the size of the central steel plate wall, but the decrease is not significant, which is less than 10%, and when the size of the central steel plate shear wall is 1 / 3 times the size of the outer frame of the structure, The bearing capacity and energy dissipation capacity of the structure are good. (4) by changing the length of the energy dissipation beam section, five eccentrically braced steel plate shear walls with different parameters are designed to study the monotone loading and cyclic loading. The monotone loading curve, hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the shear yield beam section is more favorable to the seismic performance of the structure than the bending yield type energy dissipation beam section, and when the length of the energy dissipation beam section is within the range of 1.0 m p V V and 1.3 m p V p p, the shear yield type beam segment is more favorable to the seismic performance of the structure than that of the bending yield type beam section. (5) five eccentrically braced steel plate shear walls with different parameters are designed by changing the ratio of height to thickness. The hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the bearing capacity and energy dissipation capacity of the structure are better when the ratio of height to thickness is 200.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.13;TU973.31
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