钢骨混凝土梁正截面承载力计算的叠加方法

根据塑性理论下限定理 ,由平衡条件 ,任意给定钢骨部分和钢筋混凝土部分承担的轴力 ,并分别求得相应各部分的受弯承载力 ,两部分受弯承载力之和的最大值 ,即为钢骨混凝土梁的受弯承载力。针对工程中常用的实腹式钢骨混凝土梁 ,推导出解析解 ,解决了直接采用一般叠加方法计算钢骨混凝土梁正截面承载力反复试算的困难 ,统一了钢骨混凝土梁正截面承载力的计算模式 ,给出的计算公式简捷而符合我国设计习惯

SUPERPOSITION METHOD FOR CALCULATING BEARING CAPACITY ON NORMAL SECTION OF BEAM WITH STEEL SKELETON AND BARS REINFORCED CONCRETE

On the lower limit theorem of plastic theory,axial force borne by either steel skeleton or steel bars reinforced concrete were given arbitrarily according to equilibrium condition,and flexural strength of corresponding parts were calculated respectively.Maximum value of sum of them is the flexural bearing capacity of beam with steal skeleton and bars reinforced concrete.To aim at familiar beam with solid steel skeleton reinforced concrete,analytical solution of equation had been deduced,thus the trouble cause by repeated trial calculating for calculating by generic superposition could be avoided.A mode for calculating bearing capacity on normal section of beam with steel skeleton and bars reinforced concrete could be unionized.The given formula for calculating is simple and quick and according with Chinese custom for designing.