[1]刘方成,姚玉文,吴孟桃,等.橡胶砂垫层在不同类别场地上的减震效应研究[J].地震工程与工程振动,2019,39(01):128-137.[doi:10.13197/j.eeev.2019.01.128.liufc.015]
 LIU Fangcheng,YAO Yuwen,WU Mengtao,et al.Isolating effects of rubber sand mixture cushion at different categorized sites[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2019,39(01):128-137.[doi:10.13197/j.eeev.2019.01.128.liufc.015]
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橡胶砂垫层在不同类别场地上的减震效应研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
39
期数:
2019年01
页码:
128-137
栏目:
论文
出版日期:
2019-02-28

文章信息/Info

Title:
Isolating effects of rubber sand mixture cushion at different categorized sites
作者:
刘方成1 姚玉文1 吴孟桃12 王菁菁1
1. 湖南工业大学 土木工程学院, 湖南 株洲 412007;
2. 天津大学 土木系, 天津 300072
Author(s):
LIU Fangcheng1 YAO Yuwen1 WU Mengtao12 WANG Jingjing1
1. Civil Engineering College, Hunan University of Technology, Zhuzhou 412007, China;
2. Civil Engineering Department, Tianjin University, Tianjin 300072, China
关键词:
橡胶砂垫层简易隔震减震效应场地类别反应谱
Keywords:
rubber sand mixture (RSM) cushionsimple and economic isolationseismic reduction effectssite classificationresponse spectrum
分类号:
TU4
DOI:
10.13197/j.eeev.2019.01.128.liufc.015
摘要:
橡胶砂(RSM)垫层减震是一种适用于低层房屋的低成本减震方法,关于场地类别对其减震效应影响的研究尚未开展。采用简化的层间剪切模型模拟减震垫层-上部结构动力相互作用体系,建立了RSM垫层“减震地基”分析模型。针对30%配比的橡胶砂,考虑3种垫层厚度200 mm/300 mm/500 mm、4种基底压力50 kPa~300 kPa,基于对取自于不同场地类别的195条地震波的刚性地基反应谱和RSM垫层“减震地基”反应谱的分析对比,得到以下结论:(1)RSM垫层的减震效应受场地类别的影响,场地卓越周期越短,减震效应越好;(2)RSM垫层厚度越大,减震效应越好,但当垫层厚度达到500 mm时,减震性能鲁棒性变差,且这种鲁棒性的劣化与场地类别无关;(3)各种场地类别地震波作用下,RSM垫层减震效应均随输入地震加速度和基底应力的增大而增加,但随着前者的增加,后者的影响减小。
Abstract:
Rubber sand mixture (RSM) cushion is suitable for isolating low rise buildings with very low cost. To date how the isolation effect of RSM cushion is affected by the site category on has not been recognized. The RSM cushion-upper structure dynamic interaction system, which called "isolation foundation" system, is simplified into story shear model for theoretical analysis. Rubber content of the RSM studied here is 30 percent with rubber mass. Three kinds of cushion thickness, 200 mm/300 mm/500 mm, as well as four kinds of foundation pressure from 50 kPa to 300 kPa are taken into accounted during studying. Based on the comparison of the dynamic coefficient spectrums between rigid foundation and "isolation foundation" under 195 earthquake waves adopted from different sites, it is indicated that:(1) The isolation effect of RSM cushion is indeed affected by site classification, and the isolation effect decrease with the site’s predominant period. (2) The isolation effect of RSM cushion increase with the cushion thickness, but the robustness of the isolation performance of RSM cushion becomes worse when the thickness of the cushion is up to 500 mm, and the deterioration of the robustness is independent of site category. (3) The isolation effect of the RSM cushion increases with both of the input seismic acceleration and the foundation pressure, and the influence of the latter is reduced by the increase of the former.

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备注/Memo

备注/Memo:
收稿日期:2018-07-10;改回日期:2018-10-11。
基金项目:国家自然科学基金项目(51108177,51608190)
作者简介:刘方成(1978-),男,副教授,博士,主要从事土-结构动力相互作用、结构隔震与减震方面的研究.E-mail:fcliu@hut.edu.cn
更新日期/Last Update: 1900-01-01