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已有梁腹贯穿横缝斜截面承载能力试验

, PP. 73-77

Keywords: 桥梁工程,钢筋混凝土梁,试验研究,贯穿横缝,斜截面,抗剪能力,抗弯能力

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Abstract:

?针对已有梁腹贯穿横缝的特殊性,提出了横缝斜向起裂剪力和横缝斜截面抗剪能力计算公式,并将计算结果与试验结果进行了对比。结果表明:斜截面受剪破坏对梁横缝截面的剪切破坏起控制作用,斜截面抗弯对梁横缝截面的弯曲破坏起控制作用;出现斜裂缝后,受拉纵筋锚固不足或抗剪压混凝土面积过度削弱,都导致梁横缝截面抗弯能力降低;横缝斜向起裂剪力要低于完整梁截面。

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