Self-Centering Steel-Timber Hybrid Shear Wall: Experimental Test and Parametric Analysis.

Ye Cui,Xiaojuan Qian,Zheng Li,Fei Chen

doi:10.3390/ma13112518

Abstract

Due to timber material’s environmental benefits and satisfactory structural properties, the studies on providing solutions to the application of timber to mid-rise or even high-rise buildings have been recently increasing. Among them, the steel–timber hybrid shear wall (STHSW) is one of the promising lateral resisting systems. However, the application of the system is limited because of its unsatisfactory earthquake resilience. In this paper, a new system, self-centering (SC)-STHSW, is proposed by introducing post-tensioned (PT) technology into the STHSW system. The cyclic loading test of one full-scale SC-STHSW specimen was conducted. The new system was proved to have both satisfactory self-centering capacity and the sufficient energy dissipation. Within the OpenSees platform, a numerical model was developed and validated by the experiment result. The model was further used in the parametric analysis. The system’s self-centering capacity, energy dissipation performance and the ultimate strength were evaluated under multiple parameters. The parameters included the initial PT stress ratio, the relative value of the damper’s activation force, the wood shear wall’s resistance, the beam section height and the wood shear wall’s strength. The lateral wall-to-frame stiffness ratio was also considered. Each parameter’s effects on three different performances of the system were analyzed. Based on the analysis results, a design parameter, a self-centering ratio, was proposed. The ratio was suggested to be larger than 0.5 to ensure a favorable self-centering performance in the system. This study provides support to the application of the innovative steel–timber hybrid structural system in practical engineering.

Highlights

Wood is one kind of environment-friendly material [1,2]
The hysteresis response of the SC-steel–timber hybrid shear wall (STHSW) system was in a flag shape
In the study of of the PT steel frame [16,17,18,20,21,31,41,51,52,53], the flag-shape hysteresis response was taken as the the PT steel frame [16,17,18,20,21,31,41,51,52,53], the flag-shape hysteresis response was taken as the symbol of a system with both satisfactory self-centering capacity and sufficient energy dissipation

Summary

Introduction

Wood is one kind of environment-friendly material [1,2]. It has a high strength-to-weight ratio, high thermal insulation ability and requires low energy consumption during the production. With the advantages of wood material, timber structure has been earning increasing attention in recent decades. A lot of research has been focused on making timber structure more applicable to mid-rise or even high-rise buildings [3,4,5,6,7]. The hybridization between timber and steel material is one of the research hotspots [8]. For the shear wall system, Tesfamariam et al [9] proposed a hybrid steel–timber system

Results

Discussion

Conclusion