CAJ | 학술논문

为揭示混合梁结合部的承载性能、破坏形态和受力机理，以主跨为818 m的九江长江公路大桥为研究背景，选取混合梁压剪式结合部典型格室，并设计进行比较的承剪式结合部格室，开展了两个缩尺比为1∶2的结合部局部模型承载性能试验，测试了钢与混凝土的应变及相对滑移。研究结果表明：压剪式结合部承载能力是承剪式的两倍；压剪式结合部承压板传力约占总轴力的62.5％，承压板传力减小了钢格室应力，限制了钢混凝土间相对滑移，降低了连接件传力比例，使结合部受力更合理。
위게시혼합량결합부적승재성능、파배형태화수력궤리，이주과위818 m적구강장강공로대교위연구배경，선취혼합량압전식결합부전형격실，병설계진행비교적승전식결합부격실，개전료량개축척비위1∶2적결합부국부모형승재성능시험，측시료강여혼응토적응변급상대활이。연구결과표명：압전식결합부승재능력시승전식적량배；압전식결합부승압판전력약점총축력적62.5％，승압판전력감소료강격실응력，한제료강혼응토간상대활이，강저료련접건전력비례，사결합부수력경합리。
To study the bearing behavior ,failure mode and mechanical behavior of different structural forms of steel‐concrete joint of hybrid girder ,based on the hybrid girder of Jiujiang Yangtze River Highway Bridge with 818‐metre main 8pan ,select a pressure‐resistant shear‐transferred steel‐concrete joint ,redesign a shear‐transferred only joint for contrast ,carry out two scale 1:2 model specimens bearing behavior experiment ,measure the strain and relative slip of steel and concrete .The results show that :the bearing capacity of the pressure‐resistant shear‐transferred specimen is twice than the other ;the bearing plate carries about 62.5% of the axial load ,the force transmission of the bearing plate reduces the steel stress、steel‐concrete relative slip and the force transmission ratio of connectors , makes the load transferred more effectively .