某超长剪力墙结构温度应力计算及控制

Calculation and Control of Temperature Stress in Large Horizontal Length Shear Wall Structure

文章通过确定混凝土结构的温差数值,经对比计算施工阶段和正常使用阶段的温差,结果表明施工工况为降温的控制工况,采用有限元计算超长结构施工阶段温度应力分布;计算结果表明,楼板在温度作用下的拉应力以长度中心线为基准沿长度方向扩展,在楼板凹角、洞口及竖向构件处出现应力集中,2层楼面为温度应力影响最大的楼层;合理的温差取值是温度应力计算的前提。

The value of temperature difference of concrete structure is discussed in this paper, Comparison of the temperature difference between construction stage and service stage is carried. As the result the construction state is the Control Status, FEA method is used in Calculating the distribution of temperature stress.The results shows that the tensile stress of the slab under the temperature action,which extension along the length of building is based on the centerline of the length. stress concentration occurs at the concave corner and the hole of floor and even occurs at the shear wall.the maximum thermal stress occurs at the second floor of the building;especially, the reasonable value of the temperature difference is the precondition of the thermal stresses analysis.