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对集中荷载下,6个无抗剪钢筋的钢筋混凝土桥悬臂板进行试验研究。构件与实际箱梁桥甲板板层的比例是3/4,总长10m,净悬臂长2.78m,变厚度(悬臂的固定端为380mm,末端为190mm)。构件的配筋率为0.60%和0.78%。所有的试验均为集中荷载周围剪切破坏而导致的脆性破坏形式。基于线弹性剪力场,对各种试验的结果进行研究,利用试验和数值结果,提出了对钢筋混凝土桥悬臂板剪切强度进行评估的实用建议。
Under concentrated load, six reinforced concrete cantilever slabs without shear strength were tested. The ratio of the member to the actual deck of the girder bridge is 3/4, with a total length of 10 m and a net cantilever length of 2.78 m. The variable thickness (380 mm for the cantilevered ends and 190 mm for the ends). The reinforcement ratio of the components is 0.60% and 0.78%. All tests are in the form of brittle failure caused by shear failure around the concentrated load. Based on the linear elastic shear field, the results of various tests are studied. Based on the experimental results and the numerical results, practical suggestions are put forward to evaluate the shear strength of the cantilever plate of reinforced concrete bridge.