摘要
RC frame rocking wall structure is a new structure system, which combines RC frame with rocking wall. A 6-story RC frame following current design practice is taken as an example to study the seismic behavior of the new system. Elastic-plastic model is established, and pushover analysis is conducted by using a finite element program called Abaqus and a user subroutine library called PQFiber. The analysis results suggest that: (1) the rocking wall can significantly improve the strength and ductility of the entire structure. (2) Thanks to the rocking wall, the inter-story drift becomes more uniformly distributed and the story failure mechanism is prevented, although the rocking wall does not contribute much to avoid the ‘Strong beam weak column’ yielding mechanism. (3) The inner force distribution of the rocking wall is similar to a veridical placed simple supported beam.
Abstract
框架摇摆墙结构是框架和摇摆墙组成的新型结构体系。以一个按现行规范正常设计的6层混凝土框架为例研究该结构体系的抗震性能。利用通用有限元程序Abaqus并结合清华大学开发的PQFiber用户子程序库,建立了该框架结构附加摇摆墙前后的弹塑性模型,并进行了推覆分析。分析结果表明:(1)摇摆墙可显著提高结构整体承载力及延性;(2)尽管摇摆墙对“强梁弱柱”的屈服机制无明显改善作用,摇摆墙仍可使层间变形趋于均匀,防止层倒塌模式的出现;(3)摇摆墙的受力特点与竖向放置的简支梁类似。
关键词
rocking wall /
RC frame /
pushover analysis /
failure mode /
seismic behavior
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Key words
混凝土框架 /
摇摆墙 /
推覆分析 /
破坏模式 /
抗震性能
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曹海韵;潘鹏;叶列平.
基于推覆分析混凝土框架摇摆墙结构抗震性能研究[J]. 振动与冲击, 2011, 30(11): 240-244
Cao Hai-yun;Pan Peng;Ye Lie-ping.
Pushover analysis of RC frame rocking wall structure[J]. Journal of Vibration and Shock, 2011, 30(11): 240-244
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脚注
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