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提出一种附加阻尼的悬挂式巨型钢框架支撑体系,并基于简化准则,将其格构式主体简化为梁、柱模型,利用SAP2000软件讨论其模型合理性,而后利用静力弹塑性分析方法将梁、柱模型简化为质点系剪切模型,通过分析证实其质点系剪切模型的有效性。在此基础上,采用3条人工地震波对设定的五种结构进行地震响应弹塑性时程分析,其结果表明:对于悬挂式结构,加强其主体结构约束后,子结构与主结构之间出现刚度差,其相对位移增大,而附加阻尼的悬挂式巨型钢框架支撑体系,在减小其主结构水平位移的同时,其粘性阻尼可有效的减小主子结构间的位移差,避免其差较大而产生的结构碰撞。该体系具有地震动输入能量小、塑性变形能小及阻尼耗能大等特点。且在罕遇地震作用下,损伤只集中于悬挂的子结构上,子结构充分发挥了保护主结构的作用,其较一般的悬挂体系具有良好的抗震性能。
An additional damped suspended gigantic steel frame supporting system is proposed. Based on the simplified criterion, the lattice main body is simplified as a beam and column model, the model rationality is discussed with SAP2000 software, and then the static elastic-plastic analysis method is used The beam and column models are simplified to the particle series shear model, and the validity of the particle shear model is verified by analysis. On the basis of this, three artificial seismic waves are used to analyze the elastic-plastic time-history of the five structures. The results show that for the suspended structure, between the main structure and the main structure, The stiffness is poor and the relative displacement is increased. However, with the additional suspension of the suspended giant steel frame support system, its viscous damping can effectively reduce the displacement difference between the main substructures while avoiding the horizontal displacement of the main structure, Larger and resulting structure collisions. The system has the characteristics of small ground motion input energy, small plastic deformation energy and large damping energy consumption. And under the rare earthquakes, the damage is only concentrated on the suspended substructure. The substructure gives full play to the protection of the main structure, which has better anti-seismic performance than the general suspension system.