加固砌体结构试验破坏评估与模拟

发布时间：2018-07-09 22:15

本文选题：砌体结构 + 后张预应力加固　；参考：《地震工程与工程振动》2015年06期

【摘要】：本文对某二层足尺采用后张预应力技术加固的砌体结构进行拟静力试验,针对结构在不同振幅下的损伤情况,利用《建(构)筑物地震破坏等级划分(GB/T 24335-2009)》标准进行了损伤判别,得到了不同破坏等级与层间位移角的对应关系,即1/3 000~1/1 000为轻微破坏,1/1 000~1/500为中等破坏,1/500~1/300为严重破坏,1/300为倒毁状态。为了检验后张预应力技术的加固效果,采用有限元软件对其进行数值模拟,通过试验结果验证了模拟的正确性,然后去除预应力模拟了未加固结构的拟静力试验,结果表明预应力加固技术对结构刚度贡献不大,而对强度有30%的提高。
[Abstract]:In this paper, the quasi-static test of a two-story masonry structure strengthened by post-tensioning prestressing technique is carried out. According to the damage situation of the structure under different amplitude, the damage is judged by the < Building (Construction) earthquake damage Grade Division (GB/ T24335-2009) > standard. The corresponding relationship between the different failure grades and the displacement angle between the layers is obtained, that is, 1 / 3 000 g / 1 / 1 000 is a slight damage 1 / 1 000 / 1 / 500 is a moderate failure / 1 / 500 / 300 is a serious damage / 1 / 300 / 1 / 300 is the state of collapse. In order to test the reinforcement effect of post-tensioning technique, the numerical simulation is carried out by using finite element software. The correctness of the simulation is verified by the experimental results, and then the quasi-static test of unreinforced structure is simulated by removing the prestress. The results show that the prestressed reinforcement technique has little contribution to the stiffness of the structure, but a 30% increase in the strength.
【作者单位】：中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室;北京市建筑工程研究院有限责任公司;
【基金】：中央级公益性研究所基本科研业务费专项(2013A01,2014A01) 国家国际科技合作专项(2014DFA70950)~~
【分类号】：TU317;TU364

【相似文献】