苏州中心超长异形网格屋面设计  

Design of Irregular Super-Long Spatial Roof Structure for Suzhou Center

作　　者：张谨[1] 陈伟 杨律磊[1] 龚敏锋 路江龙[1] 

机构地区：[1]苏州工业园区设计研究院股份有限公司,江苏苏州215027 [2]施莱希工程设计咨询(上海)有限公司,上海200031

出　　处：《建筑钢结构进展》2015年第3期24-31,38,共9页Progress in Steel Building Structures

摘　　要：苏州中心是目前苏州地区在建的最大商业综合体项目,其超长异形网格屋面投影面积约为35 000m2,覆盖在下部4个独立的建筑单体之上,展开长度约为630m。整个屋面结构不设置伸缩缝或抗震缝,属于超长大跨单层网格结构。不同于传统曲面的三角形网格形式,该项目采用四边形网格,在找形设计时进行了相应曲率控制。设计中采用了多种软件进行了承载力极限状态验算、正常使用极限状态验算、抗震性能设计、稳定分析及抗连续倒塌分析等。设计中还采用数值模拟与风洞试验对比以考虑风作用影响,分析了结构体型系数及风振响应。抗震设计中针对上、下结构阻尼比不同的特点,进行了多点激励与一致激励的对比,分析了结构的地震响应,并依据分析结果指导结构设计。采用的设计方法可供类似异形网格结构设计借鉴。Suzhou Center is the largest commercial building under construction in Suzhou region. It has a super long bird-shapcd roof structure supported by four independent reinforced concrete frames. The projected area is about 35 000 m2. The overall dimension of developed length is about 630 m. There is no expansion joint or seismic joint over the entire roof. Different from lraditional shell roof using triangular grid, the quadrangular grids are adopted in this project. The grid curvature is analyzed using form finding program to ensure the curvature and size are reasonable and to reduce the warp in glass panels. The behavior at ultimate limit states and serviceability limit states are also checked. The performance-based seismic design, stability analysis and progressive collapse analysis are evaluated using several softwares in design. Numerical simulation and wind tunnel tests are used to determine the shape coefficient and win＆induced response. The seismic response is checked by both multi- support excitation and uniform excitation based on the different damping ratios of steel and concrete,and the results arc used to redesign the structure accordingly. The method presented in this paper provides a reference for similar grid structures.

关 键 词：大跨空间网格 曲率控制 多点激励 数值模拟 风洞试验 

分 类 号：TU318[建筑科学—结构工程] TU356