北京市轨道交通指挥中心(二期)屈曲约束支撑设计及动力弹塑性分析

Beijing Rail Transit Command Center( Phase Ⅱ) energy dissipation technology and dynamic elasto-plastic analysis

北京市轨道交通指挥中心项目采用了框架支撑结构体系,其中支撑采用普通支撑与屈曲约束支撑结合的布置方式,采用此种方案既有效改善了结构抗侧刚度及抗震性能,又通过优化组合降低了工程造价。构件试验及结构动力弹塑性分析表明:屈曲约束支撑在设防地震作用下可率先进入屈服状态,主体结构在罕遇地震作用下塑性变形主要发生在底部区域框架柱内型钢处,且整体结构损伤程度在安全范围;结构在罕遇地震下各项性能指标满足规范要求。

Beijing City Rail Traffic Command Center （Phase II）which is used the braced frame structure system, the braces partially used with buckling restrained braces（ BRB）, can achieve good lateral stiffness and can meet seismic performance goal to prevent collapse of under earthquake. Dynamic elasto-plastic analysis shows that under the design level earthquake BRB will yield first ; the plastic deformation of main structure mainly concentrate at the steel shapes at bottom region under rare earthquakes and the damage is within acceptable level; structural performance indices under rare earthquakes can meet the requirements of code.