成都市青羊产业园会展中心结构设计

Structural design of Convention and Exhibition Center of Qingyang Industrial Park of Chengdu

成都市青羊产业园会展中心呈下小上大的结构形式,下部为钢筋混凝土框架结构+薄壳巨柱,上部为钢结构网架;因有较多斜柱,1~3层间设置少量屈曲约束支撑,支撑在多遇地震及设防地震下增加并调整结构刚度、提高承载力,罕遇地震下进入耗能阶段并提供附加阻尼;下部钢筋混凝土框架结构存在局部大跨及大悬挑,上部钢结构网架连接钢筋混凝土框架结构及薄壳巨柱。对下部钢筋混凝土框架结构进行多遇地震、设防地震及罕遇地震性能化分析;对大跨与大悬挑楼面进行舒适度分析;可以得出,整体结构及各构件在地震作用下能够满足预定的性能目标要求,大跨及大悬挑楼面满足舒适度要求。对上部钢结构网架进行风荷载、温度及地震作用在内的整体力学性能分析,对薄壳巨柱进行考虑几何非线性及材料非线性的全过程稳定承载力分析,可以得出,上部钢结构网架及薄壳巨柱具有较好稳定性。采用拆除构件法对薄壳巨柱进行了防连续倒塌分析,可以得出,偶然事件导致的局部构件失效不会引起结构连续倒塌。

Convention and Exhibition Center of Qingyang Industrial Park of Chengdu has a structure with small lower shape and large upper shape.The lower part adopts the reinforced concrete frame structure+thin-shell giant columns,and the upper part adopts the steel structure grid.Due to the large number of inclined columns,a small amount of buckling restraint braces are set between the 1 st and 3 rd floors.The braces increase and adjust the structural rigidity and improve the bearing capacity under frequent and fortification earthquakes,and enter the energy consumption stage and provide additional damping under rare earthquakes.The lower reinforced concrete frame structure had local large spans and large cantilevers,and the upper steel structure grid connects the reinforced concrete frame structure and the thin-shell giant columns.The performance analysis was conducted to the lower reinforced concrete frame structure under frequent,fortification and rare earthquakes,and the comfort analysis was conducted to large-span and large cantilevered floors,and it can be concluded that the overall structure and various components can meet the preset performance requirements under the action of earthquakes,and the large-span and large cantilevered floor meet the comfort requirements.The overall mechanical performance analysis was conducted to the upper steel structure grid under wind loads,temperature and seismic effects,and the whole process stability bearing capacity analysis was conducted to the thin-shell giant columns considering geometric nonlinearity and material nonlinearity.It can be concluded that the upper steel structure grid and thin-shell giant columns have good stability.The anti-progressive collapse analysis was conducted to the thin-shell giant columns by the dismantling component method,and it can be concluded that the partial component failure caused by the accident will not cause the progressive collapse of the structure.