(中国建筑科学研究院， 北京 100013)

［摘要］介绍了长城金融大厦结构弹性计算分析及推覆分析的过程及结果。指标及数据分析表明，结构周期比、位移角、层间刚度比等均满足规范要求，验证了结构体系的合理性。针对结构超限项进行了分析，采取提高抗震等级、墙内设置型钢、加强楼板厚度及配筋、增加柱间斜撑等设计措施，从概念及构造上保证了结构满足预设的抗震性能目标。跨度30m的转换桁架是工程的设计难点，转换桁架采用箱形杆件钢桁架，支撑上部27层楼面荷载，通过罕遇地震工况下杆件应力比分析以及节点有限元应力分析，验证了桁架满足大震不屈服的受力要求，从而保证了结构整体的性能目标。

［关键词］转换桁架； 超限措施； 性能目标

中图分类号：TU318文献标识码：A文章编号：1002-848X(2016)13-0013-06

Out-of-code structural design of transfer truss of Great Wall Financial Group Mansion

Du Wenbo, Sun Jianchao, Wang Yang, Zhou Jixiang, Yang Xiaomeng, Pan Ning

(China Academy of Building Research, Beijing 100013, China)

Abstract:The processes and results of elastic calculation analysis and Pushover analysis of Great Wall Financial Group Mansion were introduced. Index and data analyses show that, structure period ratio, interlayer displacement angles, interlayer stiffness ratio meet the requirements of the code, thus validating the rationality of structural system. Out-of-code structural issues were analyzed and measures were taken including improving the seismic grade, setting section steel in walls, strengthening the slab thickness and reinforcement and increasing the inter-column bracings, in order to ensure the structure to meet the expected seismic performance targets from the conceptual and structural perspectives. The 30m-span transfer truss was the difficulty in engineering design. The transfer truss adopted box component steel truss to support the floor load of upper layer of 27. The stress ratio analysis of component under the rare earthquake working condition and node finite element stress analysis were conducted to verify the mechanical requirements of “not yielding under the rare earthquake” of the truss, so as to ensure the performance objectives of the overall structure.

Keywords:transfer truss; out-of-code measure; performance objective

作者简介：杜文博，硕士，高级工程师，一级注册结构工程师，Email：duwb@cabr-design.com。