基于荷载富余值算法的构件正截面承载力验算程序的研发

Development of section load-bearing capacity analysis program based on load fraction computation method

钢筋混凝土任意截面构件的正截面承载力验算是结构构件设计中的一个重要环节,由于异形柱与短墙肢的广泛应用,混凝土设计规范中的手算经验公式并不适用,采用正截面承载力相关性曲面或曲线分析方法是相对准确的设计方法,国外构件设计软件功能虽然能实现关性曲面分析,但是前后处理操作繁琐,且计算相关性曲面后还需要进行几何判断才能确定承载力是否满足规范要求,对于大量竖向构件的实际工程并不适用。笔者研发了基于荷载富余值算法的正截面验算程序ETE-Section,可快速生成任意截面构件相关性曲线,并且能快速判断承载力是否满足规范要求。该程序可作为复杂结构构件截面设计的可靠工具。

The checking of load-bearing capacity of irregular reinforced concrete is an important part of structural design procedure. Due to the wide application of irregular columns and short-limbed walls, the hand calculation formula in the current reinforcement concrete design code is not applicable. The cross-section axial force and biaxial bending moment interaction curve or surface analysis method is the correct method. The current design softwares can generate interaction curve, but the pre-processing and post-processing operations are complicated, and the geometric judgment is required after generating the interaction surface to check the capacity. The program ETE-Section for irregular section based on load fraction method is developed, which can quickly generate the interaction curve of irregular section and quickly check the capacity. This program can be used as a tool for the section design of complex structural members.