连续组合梁桥UHPC接缝抗弯性能研究  

Study on Flexural Behavior of the UHPC Joint of Continuous Composite Bridge

作　　者：周捷 胡伟业 ZHOU Jie;HU Wei-ye(Zhejiang Provincial Institute of Communications Planning,Design&Research,Hangzhou 310030,China)

机构地区：[1]浙江省交通规划设计研究院有限公司,杭州310030

出　　处：《浙江交通职业技术学院学报》2021年第1期6-11,共6页Journal of Zhejiang Institute of Communications

摘　　要：针对连续组合梁桥负弯矩区桥面板易开裂的难题,提出了新型钢-混组合梁桥负弯矩区UHPC (Ultra-High Performance Concrete)接缝方案。通过建立Midas有限元模型分析了应用UHPC接缝的连续组合梁桥负弯矩区的抗弯性能,自编Matlab程序分析连续组合梁桥的裂后截面刚度折减与内力重分布,并从抗裂性能角度进行参数分析。结果表明,组合梁桥负弯矩区UHPC接缝具有良好的技术先进性和经济性。In order to solve the problem of cracking of deck in negative moment area of continuous composite bridge,a new ultra-high performance concrete(UHPC)joint scheme of the negative bending moment area of steel-concrete composite bridges was proposed.Based on the Midas finite element model,the bending performance of the continuous composite bridge with UHPC joint in the negative moment area was analyzed.The Matlab program was developed to analyze the reduction of section stiffness and redistribution of internal force after cracking of continuous composite bridge.Besides,the parameters of the joint from the angle of crack resistance was analyzed.The results showed that the UHPC joint of the negative bending moment area of composite bridge is technologically advanced and economical.

关 键 词：组合梁桥 超高性能混凝土 负弯矩区接缝 截面刚度 参数分析 

分 类 号：U443.32[建筑科学—桥梁与隧道工程]