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实现轴压比相似的预应力加载法在砌体结构振动台试验中的应用*
刘红彪1,张强1,郭迅2
摘 要

 (1 交通运输部天津水运工程科学研究所水工构造物检测、诊断与加固技术交通行业重点实验室,天津 300456 2 防灾科技学院, 北京 101601)

摘要]为了满足振动台试验中砌体墙体轴压比相似的要求,提出了一种预应力加载法。采用该预应力加载法对一座底商砌体结构模型进行了振动台试验加载,共进行了21次地震动输入,获取了不同地震动输入水平下的结构反应及结构的相应模态。试验结果表明,该预应力加载法提高了整体结构的竖向压力,在提高结构构件轴压比方面是可行且有效的。由试验结果反演可知,原型结构达到了8度小震不坏的抗震设防目标,高于相关规范中的抗震性能要求。

关键词]轴压比; 砌体结构; 振动台试验; 预应力加载

中图分类号:TU317+.1        文献标识码:A        文章编号:1002-848X(2014)15-0088-06

Application of the prestressed loading method with realization of axial compression ratio similarity in masonry structure shaking table test

Liu Hongbiao1, Zhang Qiang1, Guo Xun2

(1 Key Laboratory of Harbor & Marine Structure Safety, Ministry of Communications, Tianjin Research Institute of Water Transport Engineering, Tianjin 300456, China; 2 Institute of Disaster Prevention, Beijing 101601, China)

Abstract: In order to satisfy the requirement of the axial compression ratio similarity of the masonry wall in shaking table test, a prestressed loading method was proposed. The method was used in the shaking table test loading of a commercial masonry structure model. The model was subjected to twenty-one times of different ground motions, and the earthquake responses and modal properties of the model were assessed. Test results prove that the prestressed loading method increases the vertical compression of the whole structure and is effective in enhancing the axial compression ratio of structural specimens. From the inversion of the test results, the  prototype structure can achieve the seismic fortification goal of no damage with 8 intensity weak earchquake, which is higher than the requirements of the seismic performance in the relevant codes.

Keywords: axial compression ratio; masonry structure; shaking table test; prestressed loading

*交通运输部天津水运工程科学研究所基本科研项目(TKS140101)。

作者简介:刘红彪,博士,工程师,Email:liuhbhit@hotmail.com

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