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对板梁样本进行剪切荷载试验,从而评估局部锈蚀腹板包括剪切屈曲临界荷载和抗剪强度在内的抗剪性能。同时对与腹板锈蚀损害相关的剪切失效模式进行检验。根据板梁桥上腹板的锈蚀形式,对5个由不同锈蚀高度和平均锈蚀深度的锈蚀腹板组装而成的板梁样本进行剪切荷载试验,记录和评估试验所得的剪切屈曲临界荷载和抗剪强度,并与设计规范相比较。试验结果显示,有锈蚀板的钢板梁比无锈蚀钢板的剪切失效区域更大,且前者的失效区域趋向较低的腹板。前者减少了10%以上的剪切屈曲强度,而后者由于腹板厚度的减小也减小了其抗剪强度。
Shear load tests were performed on the slab beam specimens to evaluate the shear properties of locally corroded webs, including critical shear and buckling loads and shear strengths. At the same time, shear failure modes associated with corrosion damage to webs were tested. According to the corroded form of the upper web of the girder bridge, five beam girders assembled from corroded webs with different corroded heights and average depths of corrosion were subjected to shear loading test. The shear buckling critical loads obtained from the tests were recorded and evaluated And shear strength, and compared with the design specifications. The test results show that the corroded steel plate beam has a larger shear failure area than the non-corroded steel plate, and the failure area of the former tends to the lower one. The former reduces the shear buckling strength by more than 10%, while the latter decreases its shear strength by decreasing the web thickness.