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众所周知,建筑结构体系在温度发生变化的情况下将产生热胀冷缩的现象,若这种自由变形受到约束而限制其自由伸缩(例如在超静定结构体系),结构的杆件将要产生温度应力。如果结构杆件由温度引起的变形值过大,而杆件的材料抗变形能力很弱,温度应力将使杆件产生裂缝。为了防止杆件出现由于温度变化而引起的裂缝,设计规范规定了各种建筑结构体系的最大伸缩缝间距,以此来控制结构体系的温度变形值。很显然,从结构体系温度变形的计算公式
As we all know, the building structural system will produce thermal expansion and contraction when the temperature changes. If this free deformation is constrained to limit its free expansion (for example, in the statically indeterminate structural system), the rod structure of the structure will produce temperature. stress. If the deformation of the structural member due to temperature is too large, and the material of the member resists deformation, the temperature stress will cause the member to crack. In order to prevent the occurrence of cracks due to temperature changes in the bar, the design specification specifies the maximum expansion joint spacing for various building structural systems in order to control the temperature deformation value of the structural system. Obviously, the calculation formula of temperature deformation from the structural system