120m大跨张弦桁架结构分析与设计  

Analysis and Design of 120m Large Span Truss-String Structure

作　　者：葛卫春[1] 李宗京[2] 舒赣平[2] 

机构地区：[1]江苏省邮电规划设计院有限责任公司,江苏南京210006 [2]东南大学土木工程学院,江苏南京210096

出　　处：《江苏建筑》2017年第2期30-33,47,共5页Jiangsu Construction

摘　　要：南京水利科学研究院港口航道泥沙工程交通行业重点实验室河口海岸深水航道试验厅采用上部张弦桁架钢屋盖支承于下部型钢混凝土柱的结构形式。采用SAP2000和MIDAS两种不同软件对结构进行整体建模分析、设计。分析结果表明,考虑综合阻尼比为0.03与分别考虑混凝土结构阻尼比0.05,钢结构阻尼比0.02的分析结果差异较小,2种软件的分析结果基本吻合。结构在各荷载组合作用下的应力比及变形均满足规范要求,并且满足结构抗震的"三水准、两阶段"设计目标。结构具有较高的冗余度,能够有效保障拉索失效情况下的结构抗连续倒塌能力。The test hall of estuarine ＆ coastal deep-waterway of key laboratory of harbour and waterway engineering of Communication Industry in Nanjing Hydraulic Research Institute adapts truss-string steel structure as the roof structure and SRC column as the substructure. SAP2000 and MIDAS are used for analysis and design of the structure. The analysis results indicate that model with overall damping ratio 0.03 comply with the model with separate damping ratio which is 0.05 for concrete components and 0.02 for steel components. Equivalent stress ratio and deformation of the structure satisfy the requirements in relevant design codes. The structure fulfills the seismic design target of ＂Three-level, Two-stage＂. The structure has relatively high redundancy to prevent progressive collapse in case of cable failure.

关 键 词：大跨 预应力 张弦桁架 

分 类 号：TU323.4[建筑科学—结构工程]