网架模型日照温度效应试验研究  

Experimental Study on Temperature Effect to Grid Model in Sunshine

作　　者：李景芳[1] 金晓飞 陈友 孙建运[1] 史鹏飞[1] LI Jingfang;JIN Xiaofei;CHEN You;SUN Jianyun;SHI Pengfei(Technical Center,China State Construction Engineering,Beijing 101300,China;General Contract Company of China Construction First Building (Group)Corporation Limited,Beijing 100161,China;China United Engineering Corporation,Hangzhou 310052,China)

机构地区：[1]中国建筑股份有限公司技术中心,北京101300 [2]中国建筑一局(集团)有限公司总承包公司,北京100161 [3]中国联合工程公司,杭州310052

出　　处：《建筑钢结构进展》2018年第6期25-29,共5页Progress in Steel Building Structures

基　　金：国家自然科学基金(51378149;51308154);中国建筑股份有限公司科技研发课题(CSCEC-2012-Z-07)

摘　　要：大跨度空间结构具有杆件众多、高次超静定、温度效应复杂等特点,为研究日照下空间结构的温度效应大小,设计制作了等边三角形平板网架模型进行温度试验。以实测数据为依据,研究网架模型温度与应力的关系以及温度变化所产生的温度应力、变形大小。结果表明,日照下网架模型温度与温度应力相关性明显,网架下弦温度应力最大,最大轴向应力可达64.2MPa,最大弯曲应力可达15.85MPa;上弦温度应力最小,最大轴向应力只有18.8MPa;网架下弦靠近支座节点变形最大,最大值可达0.5mm。该研究可为空间结构非均匀温度场数值模拟方法的准确性验证提供标准、可靠的模型依据。The thermodynamic analysis on large - span structure can be very complex due to numerous members and Highly staticallyindeterminate.A typical equilateral triangle grid plane model is built to obtain the temperature field experiment data.Themeasured data is used to study the relation between temperature and thermal stress of scaled mode, and temperature- induceddeformation.The results show there is a close relation between temperature and the thermal stress.Maximum axial stress64.2MPa appears at bottom chords , of which the bending stress can reach 15.85MPa.The temperature stress at top chords isrelatively small with maximum axial stress of 18.8MPa.Maximum deformation of bottom chords appears at the base joints,which can reach 0.5mm.This study can provide a standard and reliable model for the accuracyverification of the numericalsimulation of spatial structure under non - uniform temperature field.

关 键 词：大跨度空间结构 日照 温度效应 温度试验 温度应力 

分 类 号：TU393.3[建筑科学—结构工程]