A Theoretical Study of Estimating the Elastic Responses of Framed Self-Centering Wall Structures under Lateral Loading
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-2061-3
Structural Engineering
A Theoretical Study of Estimating the Elastic Responses of Framed Self-Centering Wall Structures under Lateral Loading Xiaobin Hua,b, Chen Lua, Xiaoqing Zhua, and Xiangdong Xiec a
School of Civil Engineering, Wuhan University, Wuhan 430072, China Engineering Research Center of Urban Disasters Prevention and Fire Rescue Technology of Hubei Province, Wuhan 430072, China c School of Urban Construction, Yangtze University, Jingzhou 434023, China b
ARTICLE HISTORY
ABSTRACT
Received 25 November 2019 Revised 17 June 2020 Accepted 15 July 2020 Published Online 25 September 2020
The framed self-centering wall (FSCW) structure is a newly-emerged special type of seismicresistant system. However, the related studies rarely concern the theoretical investigation of the FSCW structures subjected to lateral loading, which is of great importance for seismic design of the FSCW structures. In view of this, the analytical model of the FSCW structures is firstly developed, then the fundamental equations that govern the elastic responses of FSCW structures under lateral loads are formulated and the corresponding analytical solutions are derived. Meanwhile, the developed analytical model is validated by the finite element method, which shows that the developed model has a good reliability in predicting the elastic responses of FSCW structures sustaining lateral loading. Utilizing the proposed method, the effects of the post-tensioned (PT) tendon and dampers on the behaviors of the FSCW structure under lateral loading are investigated. Moreover, a comparative study of mechanical performance between the FSCW structure and conventional structures under lateral loading is conducted. The results show that, in terms of the lateral displacement and shear force responses of the frame, the mechanical performance of the FSCW structure subjected to lateral loading generally falls in between those of the conventional frame-shear wall structure and the moment-resisting frame structure.
KEYWORDS Framed self-centering wall structure Analytical model Analytical solution Elastic response Lateral loading
1. Introduction In the past few decades, self-centering (SC) structures have gained considerable concerns from the researchers or engineers due to their unique seismic performance. They are featured by having little or no residual deformation after excited by strong ground motions, and thereby can restore service almost without rehabilitations. The SC structure usually achieves its self-centering performance by utilizing the rocking behavior occurring at some interfaces specially designed in the structures, such as the beamcolumn connection, and the horizontal connection between the wall segments or at the base. The SC wall is a typical SC structure. It rocks about the foundation utilizing the gap-opening behavior of the horizontal connections, which are usually located at the base or along the height of the wall. Two types of SC walls, i
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