摘要
在实际工程中,通常采用换算截面法计算组合梁应力,而不考虑截面滑移的影响。但是当组合梁采用部分剪力连接或者需要考虑疲劳问题时,忽略滑移的影响可能会引起较大的误差。该文推导了考虑界面滑移效应的简支组合梁在多种荷载工况下的弯曲应力和界面剪力的解析解,并据此进行分析,得到了弯曲应力和界面剪力在各种荷载工况下的变化规律。根据实际情况,对最不利位置的解析解进行了简化。经对比,简化计算公式的计算结果与解析解吻合良好。
In general, a transformed section method is adopted to calculate stresses of composite beams, without consideration of an interface slip. However, if a partial shear connection is used for composite beams or fatigue behaviour need to take into account, neglecting the effect of slip will lead to a great error. This paper deduces the analytic solutions of flexural stresses and interface shear forces in the elastic range of simply-supported composite beams under various load cases. On the base of this development, the variation rule of flexural stresses and interface shear forces under various load cases is obtained. According to practical requirement, the analytic solutions are simplified at the most unfavorable positions Through a comparison, the simplified solutions show a good agreement with analytic solutions.
出处
《工程力学》
EI
CSCD
北大核心
2013年第11期173-179,共7页
Engineering Mechanics
基金
国家自然科学基金项目(51078373)
关键词
组合梁
滑移
弯曲应力
界面剪力
解析解
简化计算
composite beams
slip
flexural stresses
interface shear force
analytic solutions
simplified solution
