摘要
在我国现行的GB 50017—2003《钢结构设计规范》中,采用换算截面法计算钢-混凝土组合梁的应力,由于没有考虑滑移效应的影响,计算结果与实测值有一定差距。在折减刚度法的基础上,推导了一种较简便的考虑滑移效应的组合梁弹性应力和屈服弯矩计算公式,并将所得的屈服弯矩与试验数据进行比较,发现公式的计算结果与试验数据吻合较好。根据刚度折减系数对组合梁截面屈服弯矩的影响,给出换算截面法和考虑滑移效应的组合梁截面屈服弯矩计算公式的适用范围。
In the current domestic Code for Design of Steel Structure （GB 500017--2003 ）, the transformed section method is used to calculate the stress of steel-concrete composite beam. Because of not considering the influence of slip effect, there exists some differences between the calculated results and measured ones. Based on the reduction stiffness method, a formula considering the slip effect to calculate elastic stress and yield moment of steel-concrete composite beam was derived. Comparing yield moments with test results, it was found that the calculation results were good agreement with test data. According to the effects of the stiffness reduction factor on yield moment of composite beam, the available scope of the formula for calculating yield moment of steel-concrete beam was obtained based on the transformed section method with consideration of slip effect.
出处
《钢结构》
北大核心
2016年第7期25-29,共5页
Steel Construction
基金
国家自然科学基金项目(51378430)
