坡屋面建模计算及配筋设计相关问题研究

Research on Modeling Calculation and Reinforcement Design of Pitched Roof

坡屋面中的斜板,既具有水平板属性也具有竖向墙属性,与平板受力有较大区别,对结构整体刚度、内力及指标均有较大影响,对与之相连的梁受力影响也很大,梁板构件的配筋由拉弯控制。结合PKPM软件V4.3版对于坡屋面建模要求及计算处理原则,介绍软件中坡屋面建模的几种方式,并通过五个算例工程计算结果对比分析,详细阐述坡屋面斜板在计算中应该正确建模,考虑其参与整体计算的必要性。不同坡度的坡屋面对结构刚度、构件内力及设计指标等影响差异很大,影响更大的是与斜板相连梁的内力及配筋。对斜板使用PMSAP做楼板应力分析、按拉弯构件计算板配筋,分析了按照投影面计算斜板内力及配筋的局限性及相关问题,为设计师进行此类工程设计提供参考。

The sloping plate in the pitched roof has the properties of both horizontal plate and vertical wall,which is quite different from the plate in bearing force,and has a great influence on the overall stiffness,internal force and index of the structure,as well as on the bearing force of the beam connected with it,the reinforcement of beam-slab members is controlled by tension bending. Combining with the requirement and calculation principle of pitched roof modeling in PKPM software V4. 3,this paper introduces several methods of roof modeling in software,and compares and analyses the results of five examples,it is expounded in detail that the pitched roof slope plate should be correctly modeled in the calculation,and the necessity of its participation in the whole calculation should be considered. The influence of slope roof on structural stiffness,internal force and design index is very different,especially on the internal force and reinforcement of the beam connected with the inclined plate. The influence of slope roof on structural stiffness,internal force and design index is very different,especially on the internal force and reinforcement of the beam connected with the slope plate. This paper analyzes the limitation of calculating the internal force and the reinforcement of slope slab according to the projection plane by using PMSAP software to do the stress analysis of the slab and calculating the reinforcement of the slab. It provides a reference for designers to carry out this kind of engineering design.