【摘要】 天津富润中心采用钢管混凝土叠合柱和钢筋混凝土核心筒作为结构受力体系,并利用避难层设置伸臂桁架加强其侧向刚度。提出了合理的抗震性能目标,并进行了小震弹性和大震弹塑性分析,将概念设计和计算充分结合,确保了结构方案的安全合理。在基础设计中选择了合理的静载试验方案,并采用变刚度调平来减小内筒和外框之间的沉降差。对一次性加载、正常施工模拟加载、考虑逆作的施工模拟加载三种施工顺序进行了模拟加载分析。针对钢管叠合柱与混凝土梁连接节点,提出了在钢管壁开方洞补强的方案,进行了节点补强有限元分析和节点试验。对两栋塔楼之间的裙房梁板进行了专项有限元分析,按中震不屈服配筋,并进行了大震不坍塌验算。通过将加强层核心筒角部内置圆钢管改为方钢管端柱,优化了此位置连接节点。更多还原

【Abstract】 Concrete filled steel tube composite columns and frame-core wall system form the structural system of Tianjin R&F Center,in which outriggers are used to strengthen lateral stiffness.Combined with conceptual design and structural calculations,proper seismic performance objectives were proposed,while elastic analysis under frequent earthquakes and elastic-plastic analysis under severe earthquakes were carried out to ensure the safety.In foundation design,proper static load test was selected and balance design method for variable-rigidity was used to reduce the settlement difference between core wall and frame.Three kinds of construction simulation analysis method were carried out,including one-off loading,construction simulation loading and construction simulation with consideration of inverse construction.For connecting concrete filled steel tube composite columns and RC beams,the method of opening square hole on steel tube wall to reinforce relevant areas was proposed,while corresponding finite element analysis and test were applied.For the podium between the two towers,non-yielding reinforcement under moderate earthquakes and non-collapse assessment calculations under severe earthquakes were performed based on special finite element analysis.Circular steel tubes in the corners of core wall in the reinforced layer were changed to concrete filled steel tube rectangular columns to optimize the joints.更多还原