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对某楼板大开洞且具有大质量附属设施的复杂钢筋混凝土厂房结构开展抗震性能实例研究。楼板大开洞会导致构件缺少有效的楼板约束,从而使构件发生显著的横向振动,最终构件在双向弯矩等复合内力作用下发生破坏,必须采用分布塑性铰纤维模型对该重要现象进行精细模拟,并应在设计中重点关注该类构件的横向抗弯承载力。大质量比附属设施作为非传统质量调谐阻尼器(TMD),可采用Tsai和Lin建议的简化公式进行参数优化,从而能显著减小主结构的动力响应。对于覆盖面积较大的多点弹簧支撑附属设施,必须有效考虑扭转效应导致的加速度放大,同时不能忽略大质量比对附属设施楼层反应谱的衰减作用。
A case study on the seismic performance of complex reinforced concrete structures with large openings in a floor and large mass attachments is carried out. Large openings in the slab will lead to the lack of effective floor restraint, which will cause significant lateral vibration of the slab. The final member will collapse under the action of composite internal forces such as two-way bending moment. The distributed plastic hinge fiber model must be used to simulate this important phenomenon , And should focus on the lateral flexural capacity of such members in the design. Massive Auxiliaries As non-traditional mass tuned dampers (TMDs), parameter optimization can be performed using the simplified formulas suggested by Tsai and Lin, which can significantly reduce the dynamic response of the main structure. For multi-point spring-loaded ancillary facilities covering a large area, the acceleration amplification due to torsional effects must be effectively considered, while attenuation of the response spectrum of ancillary facility floors can not be neglected.