钢框架结构梁柱节点重要性计算方法

The Calculation Method of Beam-column Joints Importance Index in Steel Frame Structures

摘要:

为解决钢框架结构梁柱节点的重要性判定问题，提出一种节点重要性计算方法。采用等效抗力折减系数表征节点失效对结构性能的影响，采用等效失效概率系数表征节点失效的实际发生概率，基于优劣解距离法(TOPSIS法)，综合考虑等效抗力折减系数和等效失效概率系数，提出计算节点重要性系数的方法。针对某4层钢框架结构算例的分析结果表明,该方法能定量判定节点重要程度，可以为实际结构检测鉴定工作提供依据。

Abstract:

In order to calculate beam-column joints’ importance index in steel frame structure, an importance index calculation method was proposed. Firstly, equivalent resistance reduction coefficient was defined to quantify the influence of failure of joints on structure’s behavior. Then, equivalent failure probability coefficient was defined to quantify the failure probability of joints. Finally, based on Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS Decision Method), considering equivalent resistance reduction coefficient and equivalent failure probability coefficient, a calculation method of beam-column joints importance index was proposed. The results of a four-story steel frame structure showed that this method could quantify joints’ importance and supply basis for inspection and appraisal of in-service steel structures.