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以东营会展中心超长钢屋盖为背景,研究斜交梁体系屋盖结构的温度效应特点。阐述了楼屋盖结构平面内刚度对温度效应的影响;推导了正、斜交网格平面内刚度的计算公式,通过分析比较,得到斜交网格平面内刚度较小的结论,有利于减小结构的温度效应。利用ANSYS软件建立正、斜交梁体系超长屋盖结构模型,并进行季节温差作用下的分析,结果表明斜交梁体系温度效应受屋盖平面内刚度影响大,刚度较大侧的温度效应显著,同时亦验证了理论分析的结论。讨论了若干因素对斜交梁体系屋盖结构温度效应特点的影响作用。并结合工程实际,提出若干设计要点。
With Donggang Convention and Exhibition Center super-long steel roof as a background, study the temperature effect of roof structure of skewed beam system. The effect of stiffness in the plane of the roof structure on the temperature effect was expounded. The formula for calculating the stiffness in the plane of the positive and oblique grids was deduced. The conclusion that the stiffness was less in the skewed grid plane was obtained through the analysis and comparison, Small structure of the temperature effect. The ANSYS software is used to build the model of super-long roof structure with positive and oblique cross-beams, and the analysis is made under the effect of seasonal temperature difference. The results show that the temperature effect of the skewed beam system is greatly affected by the in-plane stiffness of roof and the temperature effect Significantly, it also verifies the conclusion of theoretical analysis. The influence of several factors on the temperature effect characteristics of the roof structure of bias beam system is discussed. Combined with the actual project, put forward some design points.