（中国建筑西北设计研究院  西安 710003）

［提要］西安浐灞生态区行政中心是平立面均不规则的建筑，32m大跨局部转换和20余m长悬挑构件为该工程的技术难点。重点介绍了对悬挑结构采用悬挑框架方案的结构设计相关内容，采用型钢混凝土桁架组合构件解决32m大跨度局部转换的问题。计算结果表明，结构的多项控制指标均满足规范要求，结构设计方案合理。该工程设计可供同类结构借鉴参考。

［关键词］转换桁架；悬挑框架；构件延性

Design of Administrative Center of Xi"an Chanba River Ecological Area/Zhang Hui, Zeng Fansheng, Zhang Shunqiang, Cao Li, Hong Yunqiang(China Northwest Building Design Research Institute,Xi"an 710003,China)

Abstract:The administrative center of Xi"an Chanba River ecological area is an irregular plane and fa-ade structure that has a local transitions with 32m large span, and an overhanging components more than 20m long, which is a technical difficulty of this building. It introduces several problems of overhanging structure and 32m large span local transitions. The calculation results show that all structural control indexes meet the demand of code and the structure design scheme is reasonable.

Keywords:conversion truss；overhanging frame structure；component ductility