Feasibility study of buckling-restrained braces with PM-35 steel core

IF 2.2 4区工程技术 Q2 ENGINEERING, CIVIL

Structural Engineering and Mechanics Pub Date : 2021-01-01 DOI:10.12989/SEM.2021.79.2.199

Chao Zhao, Qianqiang Chen, Xingu Zhong, Tianyu Zhang, Zhiwen Chen

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引用次数: 0

Abstract

The energy dissipation characteristics of core materials greatly influence the working performance of bucklingrestrained braces (BRBs), so it is a vital work to develop more excellent energy dissipation core materials. In this research, a series of experimental studies are conducted, including the mechanical properties of PM-35 steels and the working performance of PM-35 BRB specimens, which serve to investigate the feasibility of PM-35 steel as core materials of BRBs. In addition, the analysis of variance (ANOVA) has been conducted to study the sensitivity factors of energy dissipation of PM-35 BRB specimens, especially the pre-force applied on the BRB specimens. According to the results of this research, it can be concluded that the energy absorption efficiency of PM-35 BRBs specimens is much higher than that of BRB specimens with ordinary core materials; the internal pores greatly weaken the yield strength of PM-35 steel and obviously improve the plastic deformation capacity, which makes that PM-35 core materials are able to absorb energy in a lower stress level; pre-force applied on core materials is the key factor governing the energy absorption, and can significantly improve the working performance of BRB specimens with PM-35 core materials.

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PM-35型钢芯抗屈曲支撑的可行性研究

核芯材料的耗能特性对屈曲约束支撑的工作性能影响很大，因此开发更优的耗能核芯材料是一项至关重要的工作。本研究对PM-35钢的力学性能和PM-35 BRB试件的工作性能进行了一系列的试验研究，探讨了PM-35钢作为BRB核心材料的可行性。此外，通过方差分析(ANOVA)对PM-35 BRB试件耗能的敏感因素进行了研究，特别是对施加在BRB试件上的预紧力进行了分析。根据本研究结果可知，PM-35 BRB试件的吸能效率远高于普通芯材BRB试件;内部气孔大大削弱了PM-35钢的屈服强度，明显提高了塑性变形能力，使得PM-35芯材能够在较低的应力水平下吸收能量;预紧力是控制芯材吸能的关键因素，能显著提高PM-35芯材BRB试件的工作性能。

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来源期刊

Structural Engineering and Mechanics 工程技术-工程：机械

CiteScore

3.80

自引率

18.20%

发文量

审稿时长

11 months

期刊介绍： The STRUCTURAL ENGINEERING AND MECHANICS, An International Journal, aims at: providing a major publication channel for structural engineering, wider distribution at more affordable subscription rates; faster reviewing and publication for manuscripts submitted; and a broad scope for wider participation. The main subject of the Journal is structural engineering concerned with aspects of mechanics. Areas covered by the Journal include: - Structural Mechanics - Design of Civil, Building and Mechanical Structures - Structural Optimization and Controls - Structural Safety and Reliability - New Structural Materials and Applications - Effects of Wind, Earthquake and Wave Loadings on Structures - Fluid-Structure and Soil-Structure Interactions - AI Application and Expert Systems in Structural Engineering. Submission of papers from practicing engineers is particularly encouraged.