深圳龙岗某项目弧形大悬挑人行天桥设计  

Design of Curved Large-Span Cantilever Pedestrian Footbridge in Shenzhen Longgang Project

作　　者：王雨洲 曹春华 廖耘 Wang Yuzhou;Cao Chunhua;Liao Yun(RBS Architectural Engineering Design Associates Guangzhou 510170,China)

机构地区：[1]广州容柏生建筑结构设计事务所

出　　处：《广东土木与建筑》2020年第2期47-52,共6页Guangdong Architecture Civil Engineering

摘　　要：深圳龙岗某项目其顶部弧形人行天桥向外悬挑28.5 m,其独特的造型以及体量,对设计提出了极大的挑战。结构采用了新颖的钢箱梁吊挂玻璃步道的方案,最大限度保证两侧视野开阔,及轻盈的外观。为保证舒适度,进行了拓扑优化得到结构的材料分布,并佐证了结构极限频率。进行了人行及风振舒适度验算,并决定在端部采用两组TMD来控制振动。对设计方案进行了承载力极限状态验算、正常使用极限状态验算及抗震性能设计等分析,证明结构安全可行。论述了结构的概念设计,以及如何采用复合技术解决设计中的问题。The project is located on the top of newly developed mixed-used mall in Shenzhen Longgang,which cantilevered out 28.5 m with span of 59.6 m.The design challenges derive mainly from its unique shape and tremendous mass.To ensure views of both sides and make structure visually light,designer innovatively take advantage of a tapering giant box girder to hang the deck.To enhance the frequency,topology optimization is utilized to study the material distribution.Then,comprehensive dynamic analysis is executed and two TMDs is decided to be installed at cantilever tip to soothe the vibration.The behavior at ultimate limit states and serviceability limit states are checked,following by the performance-based seismic design,which demonstrate the redundancy of structure.This paper concentrates on the conceptual design and how mixed techniques solve the design problem.

关 键 词：弧形大跨人行天桥 拓扑优化 舒适度 

分 类 号：TU393.3[建筑科学—结构工程]