摘要
提出一种钢-混凝土箱型截面组合梁结构,应用力法计算钢-混凝土箱型截面组合梁的内力,给出负弯矩区的刚度与其长度的关系。连续组合梁是变刚度截面,按弹性分析法给出正负弯矩区的抗弯刚度。对组合梁截面承载力进行分析,得出组合截面弹性极限抗弯承载力与塑性极限抗弯承载力。
A new type of steel-concrete composite beam with box section is proposed. By using force method, the internal forces for the composite continuous beam are analyzed, and the relationship of stiffness of negative moment zone and its length is defined. The stiffness of continuous beam is variable. According to the elastic analysis method, bending stiffness of positive moment zone and negative moment zone can be given. Based on the study of steel-concrete composite box beam, elastic ultimate flexural bearing capacity and plastic ultimate flexural bearing capacity of composite beam are obtained.
关键词
钢-混凝土箱型截面组合梁
抗弯刚度
弹性分析法
抗弯承载力
steel-concrete composite box-section beam
bending stiffness
elastic analysis method
capacity bearing
