钢-砼组合梁负弯矩区抗弯承载力的计算建议  

Calculation suggestion about negative moment bending strength of the steel concrete composite beams

作　　者：王庆利[1] 张曰果[1] 刘德清[1] 张文颖 

机构地区：[1]沈阳建筑工程学院土木工程学院,辽宁沈阳110168 [2]沈阳工程质量监督站,辽宁沈阳110002

出　　处：《沈阳建筑工程学院学报（自然科学版）》2004年第2期100-102,共3页Journal of Shenyang Architectural and Civil Engineering University(Nature Science)

基　　金：辽宁省自然科学基金(20031001)

摘　　要：钢-混凝土组合梁具有一系列的优点,在工程实践中的应用也日益广泛,因此,关于此类构件抗弯承载力的设计方法就显得尤为重要.笔者分析了传统设计方法和规程设计方法,发现对于承受负弯矩的钢-混凝土组合梁,当截面塑性中和轴位于钢梁上翼缘时,传统方法过于保守,规程方法的个别计算式不正确;应用等效应力法提出了新的计算建议,以算例对3种方法进行了对比,并通过试验研究加以验证,结果表明,本文的计算建议最能反映实际情况,能够保证计算的合理性.Steel-concrete composite beams offer a number of benefits and were used in practice more widely with time,so bending strength design method of this kind is more important than before.Traditional method and method provided by the 《Code for Design of Steel-concrete Composite Structure》 are analyzed.The results show that for a steel-concrete composite beam subjected to negative moment,the traditional method is too conservative when plastic neutral axis of the cross-section lies in top flange of the steel member,and certain formula in the method provided by the 《Code for Design of Steel-concrete Composite Structure》 are not perfect.Based on the equivalent stress method,new calculation suggestion is put forward and comparison of these three methods is carried out through examples and tests.Results of calculation based on the new suggestion proved the rationality of the tests.

关 键 词：负弯矩 钢-砼组合梁 抗弯承载力 规程方法 

分 类 号：TU986.2[建筑科学—城市规划与设计]