橡胶砂芯组合砌块应用于泸定地震倒塌房屋隔震研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (21) : 138-146.

论文

橡胶砂芯组合砌块应用于泸定地震倒塌房屋隔震研究

王将1，吴孟桃2，刘方成1，宾佳1，曾湘华1

作者信息 +

Application of rubber sand mixure composite blocks in seismic isolation of collapsed houses during Luding Earthquake

WANG Jiang1, WU Mengtao2, LIU Fangcheng1, BIN Jia1, ZENG Xianghua1

Author information +

文章历史 +

摘要

本文采用有限元软件对一种适用于村镇房屋隔震的橡胶砂芯组合砌块(rubber sand core composite block,RSMCB)，在已有振动台试验的基础上进行隔震响应还原模拟。然后在MOXI波和Turkey波输入工况下，对四川省甘孜州泸定县6.8级地震中发生跪坐倒塌的某砖混结构办公楼，进行铺设橡胶砂芯组合砌块前后的地震动响应模拟，对层间位移和层间剪力进行对比分析，得出以下结论：(1)输入加速度在经过橡胶砂芯组合砌块垫层过滤后均有一定程度的下降，其对高频振动频率的衰减过滤是其主要的隔震机理。(2)模拟结果与试验所得误差较小，充分验证数值建模方法的正确性以及子程序本构关系的可靠性。(3)铺设RSMCB的办公楼结构的加速度反应、层间位移和层间剪力较未铺设RSMCB结构模型明显减小。层间位移以底部隔震层最大，XYZ输入工况下，铺设RSMCB的上部结构的响应最大。(4)RSMCB的对房屋的隔震作用十分显著且满足在村镇欠发达地区的低成本隔震需求。在实施农村发展的过程中表现出良好的应用前景。橡胶砂芯组合砌块取材便捷，造价低廉，隔震效果显著，可作为一种低成本的长寿命隔震技术。

Abstract

This paper employs finite element software to simulate the seismic isolation response of a Rubber Sand Core Composite Block (RSMCB) suitable for rural housing. Based on existing shake table tests, simulations were conducted to replicate the seismic isolation response. Subsequently, seismic response simulations were performed on a brick-concrete structure office building in Luding County, Ganzi Prefecture, Sichuan Province, which experienced a knee-sitting collapse during a magnitude 6.8 earthquake, both before and after the installation of RSMCB, under the input conditions of MOXI and Turkey waves. Comparisons and analyses were made regarding the inter-story displacements and shear forces, leading to the following conclusions: (1) The input acceleration decreases to a certain extent after filtering through the rubber sand core composite block pad layer, with attenuation and filtering of high-frequency vibration frequencies being its main seismic isolation mechanism. (2) The simulation results show minor discrepancies with the experimental data, fully validating the accuracy of the numerical modeling method and the reliability of the subroutine constitutive relations. (3) The acceleration response, inter-story displacement, and shear forces of the office building structure with RSMCB installed were significantly reduced compared to the structure model without RSMCB. The inter-story displacement is the largest at the bottom isolation layer, and the response of the upper structure with RSMCB installed is the greatest under XYZ input conditions. (4) RSMCB significantly enhances seismic isolation for houses and meets the low-cost isolation needs in underdeveloped rural areas. It demonstrates good application prospects in rural development processes. The rubber sand core composite block is easy to source, cost-effective, and provides significant seismic isolation effects, making it a viable low-cost, long-life seismic isolation technology.

导出引用

王将1, 吴孟桃2, 刘方成1, 宾佳1, 曾湘华1. 橡胶砂芯组合砌块应用于泸定地震倒塌房屋隔震研究[J]. 振动与冲击, 2024, 43(21): 138-146

WANG Jiang1, WU Mengtao2, LIU Fangcheng1, BIN Jia1, ZENG Xianghua1. Application of rubber sand mixure composite blocks in seismic isolation of collapsed houses during Luding Earthquake[J]. Journal of Vibration and Shock, 2024, 43(21): 138-146

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