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通过对采用分块预制桥道板的钢-混凝土组合连续梁的力学性能分析,得出不同剪力键布置形式对组合连续梁竖向位移、钢与混凝土间相对滑移及对钢梁应力的影响,以及两种不同施工方式对组合连续梁中钢梁应力、竖向位移及桥道板应力的影响。分析结果表明剪力键数量、布置间距及剪力键刚度是影响钢-混凝土组合梁的力学性能的重要因素,同时还表明:分区段安装预制桥道板比一次落架安装桥道板效果好,尤其是对负弯矩区桥道板,分区段安装可以减小负弯矩区段桥道板的受力,控制和预防早期施工阶段中负弯矩区段混凝土裂缝的产生。
Based on the analysis of the mechanical properties of continuous steel-concrete composite beams using prefabricated ballast, the results show that the different shear-key layouts have great influence on the vertical displacement of composite continuous beams, the relative slip between steel and concrete and the stress on steel beams Influence of two different construction methods on the stress, vertical displacement and stress of bridge girders in the composite continuous beams. The analysis results show that the number of shear keys, the arrangement spacing and the shear bond stiffness are important factors affecting the mechanical properties of steel-concrete composite beams. It also shows that the installation of prefabricated plinths in sub-sections is better than the one- Especially for the bridge plate in the negative moment area, the sub-section installation can reduce the load of the bridge plate in the negative bending moment section and control and prevent the concrete cracks in the negative bending moment section in the early construction stage.