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针对现有的砌体结构设计规范未涉及温度作用效应的计算与组合问题,通过实测温差与气象资料计算温差的对比,给出了一种通过气象参数计算设计基准期内结构温差的方法。在此基础上结合一小砌块试点建筑给出了设计基准期内的年温差、日温差和组合温差统计参数。考虑了温度作用对承载能力的影响及荷载对顶层层间相对位移的影响:温度作用对砌体结构的抗压承载能力没有影响,但对顶层山墙的弯曲抗拉承载能力起控制作用,需要考虑温度作用与荷载的组合;常见荷载对顶层相对位移的影响可以忽略。提出了按承载能力设计时的温度作用分项系数取值,给出了考虑温度作用和荷载组合的顶层墙体弯曲拉应力计算公式。
In view of the fact that the existing masonry structure design code does not involve the calculation and combination of temperature effect, a comparison of temperature difference between measured temperature difference and meteorological data is given, and a method of calculating the temperature difference in the design reference period by meteorological parameters is given. Based on this, the statistical parameters of annual temperature difference, daily temperature difference and combined temperature difference during the design base period are given based on the pilot building of a small block. The influence of temperature on the bearing capacity and the influence of load on the relative displacement of the top floor are considered. The effect of temperature has no effect on the compressive bearing capacity of masonry structure, but it plays a controlling role on the bending tensile load capacity of the top gable. The combination of temperature action and load; the influence of common load on the relative displacement of top layer can be neglected. The value of sub-coefficient of temperature acting on load-carrying capacity is proposed. The calculation formula of bending tensile stress of top wall considering temperature effect and load combination is given.