【摘要】 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。更多还原

【Abstract】 Since single-layer shell has low redundant,progressive collapse is easily caused by some members ’ failure.Collapse resistant capacity of structure could be improved by semi-active control system.Firstly,MR damper element is compiled in ABAQUS software,and mechanical properties of MR damper element under different voltage is analyzed.The analysis results indicate that the MR damper element is accurate for simulating the mechanical behavior of MR damper,and it can be applied to vibration control of structure.Then design method of resisting collapse is applied to single-layer reticulated shell subjected to seism.The analysis results indicate that stress and displacement of members are reduced,and collapse resistant capacity of structure is improved.更多还原