屈曲约束支撑是一种耗能减隔震构件，近年来已被广泛应用在工程实例中。但是将屈曲约束支撑和控制相结合的研究较少。基于此本文研制出一种新型屈曲约束支撑，即基于电磁控制的屈曲约束支撑（Electromagnetic buckling restrained brace，EBRB）。本文对6组EBRB进行拟静力试验进行滞回曲线、骨架曲线、延性性能、刚度退化、耗能能力等性能指标分析，并推导出振动控制所需电磁力的计算公式。试验结果表明：通过对电磁力的推导的理论值和试验中产生的电磁力的实际值的比对发现两者的差值在8%左右，当EBRB填充材料为LC30芯材为Q235钢时其耗能能力是填充材料为C30芯材为DT4的1.08倍，延性性能是填充材料为C30芯材为DT4的1.2倍，并在电磁力的控制下构件的的抗震性能是不加电磁力的控制的1.3-1.5倍，提高了传统的屈曲约束支撑的抗震性能，在工程实例中具有较好的应用前景。
Abstract
Buckling restrained brace is known as an energy dissipative vibration isolation component that has recently been extensively applied in engineering instances. There have been few trials that combine buckling restrained brace with control. Based on this research, a new form of buckling restricted brace, electromagnetic buckling restrained brace (EBRB) based on electromagnetic control, is created. In this study, six sets of EBRBs are investigated in the suggested static test for hysteresis curve, skeleton curve, ductility performance, stiffness degradation, energy dissipation capacity, and other performance indices, and the electromagnetic force necessary for vibration control is calculated. The test results show that the difference between the theoretical value of the derived electromagnetic force and the actual value of the electromagnetic force generated in the test is about 8%, and the EBRB's energy dissipation capacity is 1.08 times that of DT4 when the LC30 core filling material is Q235 steel, and the ductility performance is 1.2 times that of DT4 when the C30 core filling material is DT4. The seismic performance of the member under electromagnetic force control is 1.3-1.5 times that of the member without electromagnetic force control, which improves the seismic performance of the traditional buckling restrained brace and has a promising application prospect in the engineering example.
关键词
屈曲约束支撑 /
控制电磁力 /
拟静力试验 /
抗震性能
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Key words
buckling restrained bracing /
controlled electromagnetic force /
proposed static test /
seismic performance
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