利用复杂截面设计工具GSEC解决鉴定加固中构件承载力问题

Bearing capacity analysis ofstrengthening members with complex section design tool GSEC

目前既有结构鉴定加固时,承载力为判定承重构件安全的重要指标之一。对于既有构件或各种方法加固后复杂构件截面的承载能力评估,现行规范计算方法均存在一定的局限性。本文结合设计规范,针对增大截面法加固不规则柱、柱外包钢法、墙肢加固产生的不规则构件,采用PKPM复杂截面设计软件GSEC对加固构件进行建模、承载力非线性分析与配筋设计,并进行截面三维承载力包络计算,完成鉴定加固中复杂构件的设计及承载力评估。

At present,the bearing capacity is the most important standard to judge the safety of bearing members when the existing structures are appraised and strengthened.There are some limitations in the current code calculation methods for the bearing capacity evaluation of complex component sections.In this paper,combined with the design specifications,for the irregular components produced by the method of increasing section method to strengthen irregular columns,steel encased columns and wall limb reinforcement,the PKPM complex section design software GSEC is used to create the section model、nonlinear analyze the bearing capacity and make the reinforcement design of the strengthened members,in addition,calculate the envelope of the three-dimensional bearing capacity of the section,so as to complete the design and bearing capacity evaluation of the complex members in the appraisal and reinforcement.