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单层网壳冗余度低,个别杆件失效容易引起结构整体倒塌破坏,对结构施加半主动控制可提高结构抗倒塌能力。首先在ABAQUS中开发了磁流变阻尼器单元,对所开发的单元进行不同电压下力学特性测试,结果表明所开发的单元能够模拟磁流变阻尼器力学特性,可用于结构振动控制中。随后应用磁流变阻尼器单元对不同地震作用下单层网壳进行抗倒塌设计分析,结果表明,在单层网壳结构中增加磁流变阻尼器可减小地震作用下结构杆件应力和位移,提高结构抗倒塌能力。
The single-layer reticulated shell has low redundancy, the failure of individual bars easily leads to the collapse of the whole structure, and the semi-active control of the structure can improve the ability of anti-collapse of the structure. Firstly, a magnetorheological damper unit was developed in ABAQUS, and the mechanical properties of the developed unit under different voltages were tested. The results show that the developed unit can simulate the mechanical properties of MR damper and can be used in structural vibration control. Then the magnetorheological damper unit is applied to design the anti-collapse of single-layer reticulated shell under different earthquake. The results show that the addition of MR damper in single-layer reticulated shell can reduce the stress of structural member under earthquake Displacement, improve the structure anti-collapse ability.