既有大型空间钢结构构件权重计算方法研究

The Calculation Method of the Weighing Factors of Members of Existing Large Span Steel Structures

根据既有大型刚性空间钢结构安全性评定的需要,对评定过程中的构件权重确定问题进行了研究。综合传统权重确定方法,在分析既有大型刚性空间钢结构失效机理的基础上,提出了一种适用于此种类型结构构件权重的确定方法。该方法建立了不同类型构件刚度与结构整体极限承载力间的关系,并据此对构件权重进行定量。应用该法获取了某类大型网壳的构件权重,证明了方法的合理性与可操作性,采用该方法得到的构件权重可为既有大型刚性空间钢结构安全性评定提供参数依据。

The quantification of weighing factors of members is researched for the safety assessment of the existing large span steel structures. Based on the traditional calculation methods of weighing factors and the failure mechanism of existing large span steel structures, an applicable calculation method of weighing factors of members of this type structure is proposed. The relationship between member stiffness and ultimate load-bearing capacity is found. The weighing factors of members are quantified. By use of the method in an existing reticulated shell project, the weighing factors of members of this type structure are calculated. The practicability of the method is proved. The weighing factors of members obtained by the proposed method provide parameters bases for the assessment of existing large span steel structures.