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空间结构周边约束刚度是影响结构温度变形和温度应力的主要因素之一。周边约束刚度与支座刚度、下部支承结构侧向刚度有关,而目前大部分研究中忽略了下部混凝土支承结构侧向刚度的影响,使得分析结果不能准确反映结构的实际状态。以天津宝坻体育馆椭球形弦支穹顶结构为背景,建立包含下部混凝土支承结构的整体模型,研究了下部支承结构侧向刚度对结构温度效应的影响,发现合理考虑下部支承结构的侧向刚度可有效降低结构的温度应力、温度变形和支座反力。
The constraint stiffness of the space structure is one of the main factors affecting the temperature deformation and temperature stress of the structure. The surrounding restraint stiffness is related to the bearing stiffness and the lateral stiffness of the lower support structure. However, in most studies, the lateral stiffness of the lower concrete support structure is neglected so that the analysis results can not accurately reflect the actual state of the structure. Based on the elliptic slingshot dome structure in Tianjin Baodi Stadium, the whole model including the lower concrete support structure is established and the effect of the lateral stiffness of the lower support structure on the structure temperature effect is studied. It is found that the lateral stiffness of the lower support structure can be effectively considered Reduce the structure of the temperature stress, temperature deformation and bearing reaction.