摘要
为解决钢混结合段区域U形加劲肋传力不流畅,受力以及施工复杂等问题,提出一种新型的带板肋的超高性能混凝土(UHPC)轻型组合桥面板,通过有限元分析将其抗疲劳性能与带U肋超高性能组合桥面板进行对比分析研究,并进一步对该结构在负弯矩作用下的承载能力,UHPC层的开裂应力,破坏模式以及荷载挠度关系进行实桥足尺模型试验研究。结果表明:(1)板肋组合桥面结构在疲劳性能上有更大优势,其在疲劳细节2,3,4上的应力幅均大大低于U肋组合结构;(2)足尺模型试验得到板肋轻型组合桥面结构的开裂应力为20.1 MPa略低于U肋轻型组合结构23.6 MPa;(3)板肋组合结构的破坏模式均为加劲肋屈服导致结构丧失承载能力而发生破坏,而U肋组合结构的破坏模式为横隔板屈曲失稳破坏于工程应用不利;
In order to solve the problem of non-smooth in load transmission,complicated on the force and construction of the U-shaped stiffener in the area of steel-concrete composite area,a new type of ultra-high performance concrete（UHPC） lightweight composite structure with plate rib is proposed.Through the finite element analysis,the fatigue resistance and the U-ribbed super high performance composite deck slab are compared and analyzed,and the bearing capacity of the structure under the action of negative bending moment,the crack stress,failure mode and load deflection of the UHPC layer are studied. The results show that：（1）The fatigue strength of the plate-ribbed composite deck structure is better than that of the U-ribbed composite structure on the fatigue details 2,3,4;（2）The cracking stress of the bridge deck structure with plate ribs is 20. 1 MPa,which is slightly lower than the 23. 6 MPa of the Uribbed light-weight composite structure.（3）The failure modes of the plate-ribbed structure is the loss of the load-carrying capacity of the stiffener,however,the U-ribbed structure is damaged because of diaphragm buckling instability.
作者
朱忠
沈志荣
沈华
周罗俊
蔡如松
邵旭东
ZHU Zhong;SHEN Zhirong;SHEN Hua;ZHOU Luojun;CAI Rusong;SHAO Xudong(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China;Transportation Planning and Design Research Institute of Yunnan Provincial,Kunming,Yunnan 650000,China;Huzhou Traflic Construction Authority,Huzhou,Zhejiang 313000,China;Huzhou Traffic Investment Group Co.,Ltd.,Huzhou,Zhejiang 313000,China)
出处
《公路工程》
北大核心
2018年第3期77-82,共6页
Highway Engineering
基金
浙江省交通运输厅项目(2015J24)
