基于杆件损伤的平板网架结构承载力评估与加固研究  

Research on Bearing Capacity Evaluation and Strengthening of Flat Grid Structure Based on Member Damage

作　　者：张玉明[1,2] 张晓瑶[1] 秦元昊 ZHANG Yuming;ZHANG Xiaoyao;QIN Yuanhao(Shandong Jianzhu University,School of Civil Engineering,Jinan 250101,China;Engineering Appraisal and Reinforcement Research Institute Co.,Ltd.,Shandong Jianzhu University,Jinan 250013,China;Comprehensive Design Research Institute Co.,Ltd.,Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]山东建筑大学工程鉴定加固研究院有限公司,济南250013 [3]郑州大学综合设计研究院有限公司,郑州450000

出　　处：《结构工程师》2025年第1期161-169,共9页Structural Engineers

基　　金：国家自然科学基金重点项目(52038006)。

摘　　要：平板网架结构因整体性好、空间刚度大、布置灵活,广泛应用于大跨度空间钢结构体系中。结构使用过程中,由于材料老化、施工等原因,杆件可能出现损伤,降低结构的承载力,进行基于杆件损伤的平板网架结构承载力的评估及加固研究具有重要意义。运用SAP2000有限元软件对一典型正交正放四角锥网架进行受力分析,根据不同位置、不同数量杆件损伤后网架结构的力学指标的变化规律提出一种新的网架结构损伤因子计算方法。该计算方法选取参数较少,计算简单且准确性较高。提出了根据结构损伤因子对网架结构承载力进行评估、确定修复措施的方法。对于需要加固的网架结构,提出了基于杆件重要性的加固方法。The flat grid structure is widely used in large-span spatial steel structure system because of its good integrity,large spatial stiffness and flexible layout.The research focuses on the evaluation and reinforcement of a flat grid structure's bearing capacity,which is critical in cases of member damage due to factors such as material aging or construction issues.In this paper,SAP2000 finite element software is used to analyze the stress of a typical orthogonal square pyramid grid structure.According to the change law of mechanical index of grid structure after damage of different positions and numbers of members,a new calculation method of damage factor of grid structure is proposed.The calculation method has fewer parameters,simple calculation and high accuracy.The method of evaluating the bearing capacity of the grid structure and determining the repair measures according to the structural damage factor is proposed.For the grid structure that needs to be reinforced,this paper proposes a reinforcement method based on the importance of members.

关 键 词：网架结构 杆件损伤 损伤因子 承载力评估 加固 

分 类 号：TU356[建筑科学—结构工程]