9度区竖向地震作用对剪力墙结构抗震性能的影响

发布时间：2018-04-16 22:10

本文选题：竖向地震作用 + 钢筋混凝土剪力墙　；参考：《西南交通大学》2017年硕士论文

【摘要】：本文以西昌(9度区)某高层剪力墙结构为研究对象,重点研究9度区竖向地震作用对剪力墙结构抗震性能的影响。先后采用了振型分解反应谱法和时程分析方法对该剪力墙结构进行水平单向地震作用、水平双向地震作用、水平单向加竖向地震作用和水平双向加竖向地震作用这几种工况下的分析计算;随后在原有结构模型的基础上分别加设三个不同长度的悬挑梁,同样对其进行上述几种工况的分析计算。对结构的层间水平位移、剪力墙轴力、梁端弯矩、跨中弯矩、悬挑梁根部弯矩和端部竖向位移进行对比分析,以此来考察竖向地震作用对高层剪力墙结构抗震性能的影响。结果表明:9度区的竖向地震作用对结构内力和变形影响很大;竖向地震作用下剪力墙结构使用时程分析方法进行补充计算是很有必要的;竖向地震作用使剪力墙轴向拉力最大增加20.20%,轴向压力最大增加15.23%;使梁端弯矩和跨中弯矩分别最大增加86.36%和89.47%;竖向地震作用对悬挑梁根部弯矩的影响程度随着挑出长度的增加而增大,且长度越大增幅越显著;结构的水平向位移基本不受竖向地震作用的影响,但是竖向地震作用对水平受弯构件的竖向位移影响较大。以上结论可以应用在9度区剪力墙结构的设计工作方面,为地震响应计算方法的选取、竖向地震作用的影响程度和悬挑构件长度的确定的提供一定的参考。
[Abstract]:In this paper, a high-rise shear wall structure in Xichang area of 9 degrees is taken as the research object, and the influence of the vertical earthquake action on the seismic behavior of the shear wall structure in the area of 9 degrees is mainly studied.The mode decomposition response spectrum method and the time history analysis method are adopted successively to carry out the horizontal unidirectional seismic action and the horizontal bidirectional seismic action to the shear wall structure.The analysis and calculation of horizontal unidirectional plus vertical seismic action and horizontal and bidirectional vertical seismic action are carried out, and then three cantilever beams of different lengths are added on the basis of the original structural model.At the same time, the above several working conditions are analyzed and calculated.The horizontal displacement, the axial force of shear wall, the moment at the end of beam, the moment in the span, the moment at the root of the cantilever beam and the vertical displacement at the end of the structure are compared and analyzed in order to investigate the effect of the vertical earthquake on the seismic behavior of the high-rise shear wall structure.The results show that the vertical earthquake in the area of 9 degrees has great influence on the internal force and deformation of the structure, and it is necessary to use the time history analysis method to carry out the supplementary calculation of the shear wall structure under the vertical earthquake.The axial tension and axial pressure of shear wall were increased 20.20, 15.23, 86.36% and 89.47% respectively. The influence of vertical earthquake on the bending moment at the root of cantilever beam was increased by 86.36% and 89.47% respectively.As the length increases,The horizontal displacement of the structure is not affected by the vertical earthquake, but the vertical earthquake has a great effect on the vertical displacement of the horizontal flexural member.The above conclusions can be applied to the design of shear wall structures in 9 degree region, and provide some reference for the selection of seismic response calculation method, the influence degree of vertical earthquake action and the determination of the length of cantilever members.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2;TU352.11

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