山区多层接地隔震框架结构的抗震性能研究

发布时间：2018-06-17 14:29

本文选题：近断层地震动 + 多层接地框架　；参考：《土木工程学报》2014年S1期

【摘要】：筛选来自台湾集集地震同一场地类别上的三个台站的地震波,包括两条近断层地震波TCU054与TCU068和一条远场波ILA007,引入多次透射边界以模拟场地的无限性,利用二次开发后的ANSYS建立考虑土-结构相互作用的山区多层接地基础隔震与层间隔震框架结构有限元模型,针对近断层地震动与远场地震动作用下山区隔震框架结构的位移、加速度、层间剪力与层间位移角等地震响应进行对比分析。结果表明:远场地震动作用下三种结构中位于陡坎上部楼层的层间剪力的相对关系均为非隔震层间隔震基础隔震,而两种隔震结构中位于陡坎下部楼层的层间剪力值很接近,与非隔震结构的相对关系与土体的刚度有关。多层接地框架的两种隔震形式均放大了掉层部分的层间剪力,但远场地震动作用下的放大效应比近断层地震动作用下的放大效应要低。两种隔震结构中位于陡坎上部的楼层在近断层地震动作用下的响应均大于远场地震动作用下的响应。
[Abstract]:The seismic waves from three stations in the same site category of Jiji earthquake in Taiwan were screened, including two near-fault ground seismic waves TCU054 and TCU068 and a far-field wave ILA007, and multiple transmission boundaries were introduced to simulate the infinity of the site. Using the second developed ANSYS, the finite element model of the isolated and interstory isolated frame structure in mountainous area considering the soil-structure interaction is established. The displacement of the isolated frame structure in the mountainous area under the action of near-fault ground earthquake and far-field ground motion is analyzed. The seismic responses such as acceleration, interstory shear force and interstory displacement angle are compared and analyzed. The results show that the relative relationship of the interstory shear forces in the upper floors of steep ridges in the three structures under the action of far field ground motion is the isolation of the base isolation of non-isolated layers, while the interstory shear values of the two isolation structures located at the lower floors of the steep ridges are very close. The relative relation with non-isolation structure is related to the stiffness of soil. The two isolation modes of multi-story ground frame amplify the shear force of the falling layer, but the amplification effect of the far field ground motion is lower than that of the near fault ground earthquake. The response of the floor located on the upper side of the steep canyon in the two isolation structures is larger than that under the action of the far-field ground motion.
【作者单位】：重庆大学山地城镇建设与新技术教育部重点实验室;重庆大学土木工程学院;
【基金】：重庆市建设科技计划(2011-2-80) 中央高校基本科研业务费(106112014CDJZR200006)
【分类号】：TU352.12

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