某无梁楼盖结构设计方法比较分析

COMPARISON AND ANALYSIS OF DESIGN METHODS OF A BEAMFREE ROOF STRUCTURE

针对某无梁楼盖,分别采取经验系数法、等代框架法及有限元空间模型分析方法进行设计计算。就各种设计方法的结果进行比较,分析产生差异的原因及每种计算方法与实际受力情况的吻合情况。通过比较给出设计建议,采用较精确的有限元法进行计算,用其他方法进行复核,特别是边支座负弯矩,建议在有限元法设计的基础上,关键部位的配筋应通过其他计算方法的复核情况予以适当放大,以使设计更符合实际及经济合理。

A beam-free roof is designed and computed by using empirical coefficient method, equivalent-frame method and finite element space model analysis method respectively. The results of these design methods are compared with each other to analyze reasons for their difference and relation between each method and practical force bearing condition. After comparison, design suggestions are given, such as using finite element method which has better accuracy for calculation and other method for verification. Especially for the negative moment of side base, it is suggested that the steel reinforcement at key positions, based on finite element design, shall be appropriately increased through verification by using after calculation method, so as to enable the design to better meet practical and economic requirements.