【摘要】 利用数值分析方法 ,讨论了集中荷载作用下受拉钢筋暴露的钢筋混凝土简支梁的工作性能 ;分析了集中荷载位置、开口的宽度和高度、受拉钢筋的配筋率、混凝土强度、是否配架立筋以及开口的位置等因素对开口梁受弯性能的影响 ;指出了开口高度对开口梁残余承载力影响最大 ,当开口边缘位于梁弯矩最大位置时 ,梁残余承载力降低的幅度最大 ;并给出了施工建议 ,为合理地选择加固方法提供了依据更多还原

【Abstract】 According to the numerical analytical theory suggested in this paper, a discussion is carried out about the effect of various parameters (the loading position of concentrated load, width and height of exposed main reinforcement, percentage area of reinforcement in beam section, strength of concrete, if or no minimal top steel is used, distance of the end of exposed reinforcement from the left support) on the ultimate load bearing capacity of beams with exposed tensile reinforcement under concentrated load. And according to the analytical theory, some advice and outline have been brought forward. The effect of the biggest parameter on the remnant strength is the height of exposed main reinforcement, the next is the width and the loading position of concentrated load. When the loading position of concentrated load exerts an effect on the area of exposed tensile reinforcement, the depressed extent of remnant strength. is much bigger. When the loading position of concentrated load effect on the position of maximal moment, the depressed extent of remnant strength. is the biggest. Based on the result, we can realize the change of remnant strength of beam in the process of reinforcement. It is the support of reinforced construction.更多还原