摘要
结合一多层装配式钢框架实例,分析了装配式钢结构梁柱自耗能节点体系在该钢框架中的应用。进行了多遇地震作用下的反应谱分析、及罕遇地震作用下的动力弹塑性分析,验证了装配式钢框架减震结构在设计后能否满足“大震不倒”的抗震设防要求。结合Perform-3D软件对装配式钢结构的自耗能节点抗震性能,在多遇、罕遇地震作用下的层间位移角和结构耗能效率展开分析。结果表明:钢结构在多遇、罕遇地震作用下层间位移角满足规范限值要求,层间位移角不大于1/50;罕遇地震作用下,结构的最大弹塑性层间位移角为1/55,自耗能直梁段节点在罕遇地震作用下进入塑性状态并耗能,新型节点耗能占结构总耗能的60%左右;结构构件耗能显著降低,则损伤程度降低。自耗能直梁段节点设计工作状态良好,体现出良好的耗能机制,有效地保护了主体结构,吸收了大量的地震能量。
Combined with an example of a multi-layer fabricated steel frame, the application of the fabricated steel beam-column self-dissipating node system in the steel frame is analyzed. The response spectrum analysis under the action of frequent earthquakes and the dynamic elastic-plastic analysis under the action of rare earthquakes are carried out, and it is verified whether the prefabricated steel frame shock absorption structure can meet the seismic fortification requirements of "not overturned in a big earthquake" after design. Combined with Perform-3D software, this paper analyzed the seismic performance of self-dissipating nodes of fabricated steel structures, the interstory drift displacement angle and structural energy consumption efficiency under the action of frequent and rare earthquakes. The results show that the interstory drift displacement angle of the steel structure under the action of frequent and rare earthquakes meets the requirements of the specification limit, and the interstory drift displacement angle is not greater than 1/50;under the action of rare earthquakes, the maximum elastic-plastic interstory drift displacement angle of the structure is 1/55, the self-dissipating straight beam joints enter a plastic state and dissipate energy under the action of rare earthquakes. The energy consumption of the new joint accounts for about 60% of the total energy consumption of the structure;the energy consumption of structural members is significantly reduced, and the damage degree is reduced. The self-dissipating straight beam section joints are designed in good working condition, reflecting a good energy dissipation mechanism,effectively protecting the main structure and absorbing a large amount of seismic energy.
作者
唐天国
宋军凯
廖强
鲍泽辰
TANG Tianguo;SONG Junkai;LIAO Qiang;BAO Zechen(College of Architecture and Environment,Sichuan University,Chengdu 610065,China;CREC Sichuan Eco-City Investment Co.,Ltd.,Renshou 620500,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期759-763,共5页
Building Structure
关键词
装配式钢结构
时程分析
节点连接
罕遇地震
fabricated steel structure
time history analysis
joint connection
rare earthquake
