摘要
提出了一种剪切型摩擦钢桁架连梁(SFTCB),将摩擦装置安装在斜腹杆,把连梁的塑性变形转化为摩擦装置的滑移变形,保证连梁主体不发生破坏,利用摩擦装置消耗地震能量。为了研究SFTCB的抗震性能,进行了循环往复加载试验,试验结果表明钢桁架的弦杆、腹杆没有进入塑性,连梁变形主要由摩擦装置的往复滑移贡献,剪切型摩擦钢桁架连梁利用摩擦装置进行耗能从而获得稳定的滞回行为。之后建立了准确有效的有限元模型,并利用试验结果进行了标定。通过有限元模型分析摩擦装置起滑力对连梁性能的影响,有限元模拟结果说明摩擦装置起滑力主要控制连梁承载力而不会改变连梁的初始刚度,最后提出了剪切型摩擦钢桁架连梁的承载力计算方法。
In this paper,a shear type frictional steel truss coupling beams(SFTCB)is proposed.The friction device is installed on the diagonal web member,and the plastic deformation of the coupling beam is transformed into the sliding deformation of the friction device to ensure that the main body of the coupling beam will not be damaged,and the seismic energy is consumed by the friction device.The cyclic loading test of the SFTCB specimen is carried out to study the seismic performance.The results show that the chord and web members of the steel truss do not have plastic deformation,and the deformation of the coupling beam is mainly contributed by the reciprocating sliding of the friction devices.The SFTCB uses the friction devices to dissipate energy and obtain stable hysteretic behavior.After that,an accurate and effective finite element model was established and calibrated with the test results.Through the finite element model,the effect of the sliding force of the friction device on the performance of SFTCB is analyzed.The results of the finite element simulation showed that the sliding force of friction devices control the resistance capacity without changing the initial stiffness of the SFTCB.Finally,the evaluation of the SFTCB resistance is proposed.
作者
吴天骄
崔瑶
王涛
WU Tianjiao;CUI Yao;WANG Tao(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2020年第5期139-147,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家重点研发计划课题(2017YFC1500701)
国家自然科学基金项目(51678106)
中国地震局工程力学研究所基本科研业务费专项(2016A06)。
关键词
剪切型钢桁架连梁
摩擦装置
受力机理
有限元模拟
可更换
shear-type steel truss coupling beam(SFTCB)
friction device
resistance mechanism
FEM
replaceable
