悬挑大跨混凝土框架-剪力墙结构弹塑性分析及试验研究

葛康,陈世鸣

振动与冲击 ›› 2015, Vol. 34 ›› Issue (8) : 83-92.

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PDF(5079 KB)
振动与冲击 ›› 2015, Vol. 34 ›› Issue (8) : 83-92.
论文

悬挑大跨混凝土框架-剪力墙结构弹塑性分析及试验研究

  • 葛康,陈世鸣
作者信息 +

Elasto-plastic analysis and experimental study of cantilevered and large-span concrete frame-wall structure

  • GE Kang,CHEN Shiming
Author information +
文章历史 +

摘要

某拟建文化艺术中心是一个具有大空间、大悬挑等特点的混凝土框架-剪力墙结构,结构一端为多层大悬挑结构,最大悬挑长度为22m,并且在顶层中庭有30m的大跨度区域,属平面和立面均不规则的结构。本文采用NOSACAD和ABAQUS有限元程序建立整体结构分析模型,进行7度罕遇烈度下的弹塑性时程分析,研究了该结构在大震作用下的变形情况、塑性铰的分布以及受力机理等。计算结果表明:结构的悬挑端在竖向地震作用下的动力响应显著,剪力墙受拉损伤在结构底部和悬挑楼层处较为明显;但在大震下层间位移角满足规范要求;并对结构裙房截断后的模型进行了1/30的大缩尺模拟地震振动台试验,验证了截断模型方法在本试验中的合理性,最后根据构件的受力或损坏情况给出了设计改进建议。

Abstract

The culture and art center discussed here was a RC frame-wall structure characterized with large cantilevered area and large space, the maximum span of large cantilevered area and large span were 22m and 30m respectively, which was irregular both in plan and elevation. Using Nosacad and Abaqus, the structural analysis model was established in order to simulate the nonlinear behavior and study deformations, distribution of plastic hinges, and mechanism under the rare earthquake of magnitude of 7. Based on the analysis, the cantilevered area is sensitive to vertical earthquake; tension damage mainly occurs at the bottom of the shear wall and cantilevered stories; the maximum inter story drifts are less than seismic design requirement of Chinese code. A 1/30 scale model was tested on shaking table to study the seismic behavior of this kind structure through cutting the podium of the structure, comparison between the model before and after the cut was conducted to verify reasonability of this design method. The test result meets well with the result of finite element analysis. Finally, according to response and damage stare of the structure, suggestion for structure optimization is given.
 

关键词

大悬挑结构 / 弹塑性时程 / 模型设计 / 地震响应 / 振动台试验

Key words

large cantilevered structure / elasto-plastic time history analysis / model design / seismic response / shaking table test; 

引用本文

导出引用
葛康,陈世鸣. 悬挑大跨混凝土框架-剪力墙结构弹塑性分析及试验研究[J]. 振动与冲击, 2015, 34(8): 83-92
GE Kang,CHEN Shiming. Elasto-plastic analysis and experimental study of cantilevered and large-span concrete frame-wall structure[J]. Journal of Vibration and Shock, 2015, 34(8): 83-92

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