钢筋混凝土桥的人行道,一般常采用悬臂挑梁结构,以减轻桥面自重,节约材料。四川省过去设计悬臂挑梁多按悬臂简支梁计算,所配钢筋贯穿全挑梁。考虑到人行道悬臂梁的中部是搁置在桥体上的,1978年经四川省交通局勘察设计院科研室对这个问题进行了试验、研究。在《钢筋混凝土人行道悬臂挑梁试验报告》中指出:通过对试验梁(长细比为20∶1,梁长2.4米,中部支承长1.60米,横断宽×高=10厘米×12厘米,两端悬臂各长0.4米,端头横断面宽×高=10厘米×6厘米,设计破坏荷载 P=2.3吨)的实际加载观测,试验证明,如把悬臂梁的支承部位,不加任何 The sidewalks of reinforced concrete bridges are generally used cantilevered beam structure, in order to reduce the weight of the bridge, saving materials. In the past, the design of cantilever beam in Sichuan Province was calculated by simply supported cantilever beam. Taking into account the middle of the cantilever on the sidewalk is resting on the bridge body, in 1978 by the Sichuan Provincial Department of Transportation Survey and Design Institute of Science and Technology Department of this issue were tested and studied. In the “Cantilever Beam Beam Test Report on Sidewalks of Reinforced Concrete”, it is pointed out that through the test beam (slenderness ratio of 20: 1, beam length 2.4m, center support length 1.60m, transverse width × height = 10cm × 12cm, End cantilever length of 0.4 meters, the end cross-section width × height = 10 cm × 6 cm, designed to destroy the load P = 2.3 tons) of the actual load observation, the test proved that if the cantilever bearing parts, without any