1.中国地震局工程力学研究所， 哈尔滨 150080;2.中国地震局地震工程与工程振动重点实验室， 哈尔滨 150080
E-mail:
E-mail: junwudai@126.com
中国地震局工程力学研究所基本科研业务费专项资助项目(2017A01),中国地震局地震工程与工程振 动重点实验室重点专项(2019EEEVL0402）
1.Institute of Engineering Mechanics， China Earthquake Administration， Harbin 150080， China;2.Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration， Harbin 150080， China
The project supported by Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration (2017A01) and the Key project of Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration (2019EEEVL0402)
传统的全钢屈曲约束支撑（BRB）中，由于一字形内芯缺乏长度方向的有效约束，其时常表现出明显的局部屈曲效应，大幅降低BRB的疲劳性能.鉴于此，本文提出了一种新型全钢BRB，其采用两块T型钢板作为次要约束构件，取代传统的混凝土或砂浆对内芯的约束作用.为了深入分析新型全钢BRB实际受力状态，本文基于Abaqus非线性有限元软件，对其进行数值分析，并将模拟结果与试验结果进行对比以验证数值模拟的有效性与准确性.试验与模拟结果的高度吻合表明，本文建立的有限元模型可以作为新型全钢BRB参数化分析的基准模型，用以研究内芯的初始缺陷与宽厚比；内芯与外套管之间的摩擦系数与间隙以及外部约束角钢的厚度等因素对其耗能性能的影响.上述相关因素的参数化分析结果表明，经过合理设计的新型全钢BRB可以展现出良好的耗能性能.
The rectangle core plate of all-steel buckling-restrained braces （BRBs） usually exhibit obvious local buckling， due to the lack of longitudinal restraint from the encasing tube. To eliminate the undesirable effects， a novel steel BRB is proposed. In this new-type steel BRB， two T-shaped steels are adopted as the minor restraint elements to restrain the core plate instead of the infilled concrete or mortar. In order to reproduce the behavior of the BRB， the finite element model is established using Abaqus software， and validation of the model is done through comparing the experimental results with the simulated results. The comparison results demonstrate that the finite element model could be used for the further parameter study on the all-steel BRBs. Finally， the parameter study of factors， including the initial defects， the friction coefficient and the gap between the steel core and the outer sleeve， the width-to-thickness ratio of the steel core and the thickness of the outer angle steel， shows that the well-configured all-steel buckling restrained braces could have many advantages and exhibit desirable seismic performance.
姜涛,戴君武,杨永强,柏文.一种新型全钢屈曲约束支撑静动力学性能分析[J].动力学与控制学报,2020,18(5):46~56; Jiang Tao, Dai Junwu, Yang Yongqiang, Bai Wen. STUDY OF THE NEW-TYPE ALL-STEEL BUCKLING RESTRAINED BRACES[J]. Journal of Dynamics and Control,2020,18(5):46-56.
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