石膏内置模空心楼盖的荷载敏感度分析

Load sensitivity analysis of gypsum built-in module hollow floor

研究静力荷载作用下,石膏内置模空心楼盖各构件的荷载敏感性,文中采用有限元分析方法对边支承空心楼盖和柱支承空心楼盖各构件的内力及挠度进行研究,分析各构件随荷载位置变化的力学规律,并采用标准差的统计方法来反应构件对荷载的敏感度。研究发现两种支承形式的空心楼盖肋梁支座内力变异幅值要明显大于跨中内力的变异幅值,柱支承空心楼盖不同位置肋梁的内力差异明显,但构件反应随荷载变化的敏感度要明显小于边支承空心楼盖。故在空心楼盖设计时,应根据楼盖支承形式、荷载作用位置及构件的荷载敏感度来找出结构较薄弱的部位进行加强处理。

The load sensitivity of gypsum built-in module hollow floor under static load was studied, the finite element analysis method was used to study the internal force and deflection of edge supported hollow floor and column supported hollow floor, and to analyze the mechanical variation of each component under different load position, and the statistics method of standard deviation was adopted to express the load sensitivity of hollow floor. It is found in the study that the internal force variation amplitude of rib-beam on support of the two supporting types of hollow floor is much higher than that of rib-beam on mid span. The internal force variation of rib-beam at different position of column supporting hollow floor is obvious, while the sensitivity of the component response changing with load is obvious less than that of edge supporting hollow floor. Therefore, in the hollow floor design, we should consider floor supporting form, load position and component sensitivity to find out the weak parts of structure for reinforcement treatment.