基于生物启发的新型隔震系统设计与可应用性研究  

Design and Feasibility Study on Bio-inspired Isolation System with Case Study

作　　者：施志国 单伽锃 张全伍[1] 施卫星[1] SHI Zhiguo;SHAN Jiazeng;ZHANG Quanwu;SHI Weixing(Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai,China,200092)

机构地区：[1]同济大学土木工程学院结构工程与防灾研究所,上海200092

出　　处：《沈阳建筑大学学报（自然科学版）》2018年第2期193-201,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51408435);中央高校基本科研业务费专项资金资助

摘　　要：目的对典型框架结构进行隔震设计,验证基于生物启发的新型被动基础(BIO)隔震系统在工程中的应用.方法基于ETABS数值模型,利用ETABS软件中自带的Multi-Linear Elastic单元和Plastic(Wen)单元组合形成新型BIO模拟单元.并与传统线性隔震进行对比.结果组合BIO单元能够较好地模拟BIO元件的力学行为和耗能特征.隔震结构的周期延长为未隔震结构的3.7倍左右,水平减震系数可达到0.29.BIO隔震系统在罕遇地震下支座最大位移为219 mm,小于支座位移限值350mm.对于基底剪力的改善比例在10%~25%,对于隔震层位移的改善比例在10%~25%.BIO隔震系统能够较好地满足《建筑抗震设计规范》(GB50011—2010)的要求.结论 BIO隔震系统与传统线性隔震系统相比,具有更好的耗能能力,能够有效地降低基底剪力,同时减小隔震层位移.To validate the feasibility of innovative base isolation system(BIO isolation system),BIO isolation system was adopted in a frame structure in ETABS software.The BIO component can be assembled with Multi-Linear Elastic element and Plastic(Wen)element which are software-provided.The results of BIO isolation system are compared with linear isolation system.Time-history result indicates that assembled BIO component is able to simulate the BIO mechanical behavior and energy dispersion mechanism well.The period of isolated-structure is about 3.7 times that of original structure,and the earthquake-reduction coefficient is about 0.29.Maximum base drift of BIO isolation in severe earthquake is 219 mm,which is within standard limits(350 mm).The improvement of base shear force is about 10%~25%,and the improvement of base drift is about 10%~25%.BIO isolation can meet the design requirement in Earthquake resistant design code(GB50011-2010).Furthermore,compared with the traditional linear isolation,BIO isolation system has better energy dissipation capacity and can decrease the base shear and base drift that is within standard limits.

关 键 词：生物启发 隔震结构 时程分析 ETABS软件 

分 类 号：TU318.1[建筑科学—结构工程]