CAJ | 학술논문

通过新型叠合梁、传统矩形叠合梁及现浇对比梁在单调荷载下的足尺模型试验，对试件梁端的破坏形态、整体受力性能、斜截面抗剪承载力与位移延性等进行了研究。结果表明：新型叠合梁与现浇对比梁均发生了剪切破坏；在受力全过程中，新型叠合梁的裂缝特征和破坏形态都与现浇对比梁类似，没有出现沿叠合面发展的水平裂缝；新型叠合梁的倾斜叠合面上预埋抗剪连接件后能进一步提高试件的整体受力性能；新型叠合梁的抗剪承载力比传统矩形叠合梁提高了约12％，与现浇对比梁相当；新型叠合梁的位移延性系数较现浇对比梁的低9％～13％，比传统矩形叠合梁的高8％～13％；所提出的新型叠合梁与现浇对比梁的整体性能较为接近，可满足工程设计要求。
통과신형첩합량、전통구형첩합량급현요대비량재단조하재하적족척모형시험，대시건량단적파배형태、정체수력성능、사절면항전승재력여위이연성등진행료연구。결과표명：신형첩합량여현요대비량균발생료전절파배；재수력전과정중，신형첩합량적렬봉특정화파배형태도여현요대비량유사，몰유출현연첩합면발전적수평렬봉；신형첩합량적경사첩합면상예매항전련접건후능진일보제고시건적정체수력성능；신형첩합량적항전승재력비전통구형첩합량제고료약12％，여현요대비량상당；신형첩합량적위이연성계수교현요대비량적저9％～13％，비전통구형첩합량적고8％～13％；소제출적신형첩합량여현요대비량적정체성능교위접근，가만족공정설계요구。
Full-scale model test under monotonic load was conducted on a new type of composite beam,a traditional composite beam and a cast-in-place contrast beam to investigate the failure pattern and the overall mechanical behavior of the composite beam’ s ends,the diagonal shear capacity and displacement ductility of the specimens,etc.The results indicate that both of the composite beam and the cast-in-place contrast beam are failed by shear.The crack features and failure modes of the new type of composite beams are similar to the cast-in-place contrast beam throughout the testing process,no horizontal cracks appear along the combined interface.The overall mechanical behavior of the new type of composite beams can be further increased after putting the pre-embedded shear connector inside the inclined lamination.The diagonal shear capacity of the new style composite beams is about 1 2% higher than that of the traditional rectangle composite beams,as same as the cast-in-place beam.the displacement ductility of the composite beams is about 9%-13% lower than that of the cast-in-place contrast beam,and 8%-13% higher than that of the traditional rectangle composite beams.In general,the overall behaviors of the new types of composite beams are similar to those of the cast-in-place contrast beam,and can meet the engineering design requirement.