聚丙烯网水泥砂浆面层加固砖砌体结构振动台试验及数值模拟

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (23) : 112-123.

论文

刘祖强1,2，梁钰强1，张风亮3，薛建阳1,2

作者信息 +

Shaking table tests and numerical simulation for brick masonry structure reinforced with polypropylene mesh cement mortar coating

LIU Zuqiang1,2,LIANG Yuqiang1,ZHANG Fengliang3,XUE Jianyang1,2

Author information +

文章历史 +

摘要

以陕西省蓝田县的单层砖砌体结构为原型，制作了1/2缩尺的试验模型，并对其进行了聚丙烯网水泥砂浆面层加固。完成了加固模型的地震模拟振动台试验，分析了加固模型的地震破坏过程及破坏形态。基于试验研究，采用ABAQUS建立了聚丙烯网水泥砂浆面层加固砖砌体结构的有限元模型，将加固模型的动力特性、动力响应和地震损伤分布的计算结果与试验结果进行了对比分析，验证了有限元模型的合理性，进而对是否加固、面层水泥砂浆强度和聚丙烯网格间距进行了参数分析。结果表明，聚丙烯网水泥砂浆面层加固砖砌体结构的破坏主要发生在门窗洞口角部、纵横墙交接处及纵墙的檩条下方；有限元计算结果与试验结果吻合较好，能够较好地反映加固模型在地震作用下的受力性能；聚丙烯网水泥砂浆面层加固能够抑制裂缝的产生和发展，减小动力响应，有效提升砖砌体结构的抗震性能；随着面层水泥砂浆强度的提高和聚丙烯网格间距的减小，加固模型的地震损伤程度不断减轻、动力响应逐渐减小。

Abstract

Taking a one-story brick masonry structure in Lantian county, Shaanxi province as the prototype, the 1/2 scale test model was manufactured and strengthened by polypropylene grid cement mortar coating. Shaking table tests were carried out on the strengthened model, and its failure process and failure pattern under earthquake action were analyzed. Based on the tests, the finite element analysis (FEA) model of brick masonry structure strengthened by polypropylene grid cement mortar coating was established by using ABAQUS. The dynamic characteristic, dynamic response and seismic damage, which were obtained by calculation, were compared with test results, and the rationality of the FEA model was verified. And then the parametric analysis about strengthened or not, the strength of surface cement mortar and the spaces of polypropylene grid was carried out. The results showed that the damage of brick masonry structure strengthened by polypropylene grid cement mortar coating mainly occurred at the corner of door and windows, the junction of longitudinal wall and transverse wall and the part of longitudinal wall below the purlin. The calculated results agreed well with the test results, and could better reflect the mechanical performance of strengthened model under earthquake action. The strengthening method of polypropylene grid cement mortar coating could suppress the appearance and development of cracks, reduce the dynamic response and effectively improve the seismic performance of brick masonry structure. With the strength of surface cement mortar increasing and the spaces of polypropylene grid decreasing, the seismic damage and dynamic response of strengthened model both decreased gradually.

导出引用

刘祖强1,2，梁钰强1，张风亮3，薛建阳1,2. 聚丙烯网水泥砂浆面层加固砖砌体结构振动台试验及数值模拟[J]. 振动与冲击, 2023, 42(23): 112-123

LIU Zuqiang1,2,LIANG Yuqiang1,ZHANG Fengliang3,XUE Jianyang1,2. Shaking table tests and numerical simulation for brick masonry structure reinforced with polypropylene mesh cement mortar coating[J]. Journal of Vibration and Shock, 2023, 42(23): 112-123

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