Topology optimization and seismic collapse assessment of shape memory alloy(SMA)-braced frames:Effectiveness of Fe-based SMAs

作     者：Aydin HASSANZADEH Saber MORADI Aydin HASSANZADEH;Saber MORADI

作者机构：Department of Civil EngineeringRyerson UniversityToronto M5B 2K3Canada 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2022年第16卷第3期

页      面：281-301页

核心收录：

学科分类：081405[工学-防灾减灾工程及防护工程] 0806[工学-冶金工程] 08[工学] 081402[工学-结构工程] 0837[工学-安全科学与工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 0701[理学-数学] 

基　　金：supported by the Ryerson University Faculty of Engineering and Architectural Science and the Natural Sciences and Engineering Research Council of Canada(NSERC)through Discovery Grant 

主　　题：topology optimization shape memory alloy Fe-based SMA steel braced frames performance-based seismic design collapse assessment 

摘      要：This paper presents a seismic topology optimization study of steel braced frames with shape memory alloy(SMA)*** SMA-braced frames(SMA-BFs)with either Fe-based SMA or NiTi braces are determined in a performance-based seismic design *** topology optimization is performed on 5-and 10-story SMA-BFs considering the placement,length,and cross-sectional area of SMA bracing ***,strength,and performance-based design constraints are considered in the *** seismic response and collapse safety of topologically optimal SMA-BFs are assessed according to the FEMA P695 methodology.A comparative study on the optimal SMA-BFs is also presented in terms of total relative cost,collapse capacity,and peak and residual story *** results demonstrate that Fe-based SMA-BFs exhibit higher collapse capacity and more uniform distribution of lateral displacement over the frame height while being more cost-effective than NiTi braced *** addition to a lower unit price compared to NiTi,Fe-based SMAs reduce SMA material *** frames with Fe-based SMA braces,the SMA usage is reduced by up to 80%.The results highlight the need for using SMAs with larger recoverable strains.