Thermal Stress in Main Girder of Long-span Pre-stressed Concrete Cable-stayed Bridge
Based on the spatial finite element model of Huaian Bridge, the widest long-span prestressed concrete cable-stayed bridge in China now, under the actions of the temperature gradient in design specification of JTG D60-2004 and rise of temperature equally on the top slab in specification of JTJ 021-89, the distribution patterns of the temperature stresses on the top slab, the bottom slab and the transverse diaphragm in the prestressed concrete main girder were investigated respectively. The results of analysis show that there are high principle tensile stresses on the bottom slab and the transverse diaphragm under the temperature loads, while under the temperature gradient pattern, there are higher principle tensile stresses on the bottom slab and the transverse diaphragm which will probably cause their crack. The results also show that the influence of the temperature stress in the main girder of the prestressed concrete cable-stayed bridge calculated by JTG D60-2004 is larger than that by JTJ 021-89, so the results calculated by JTG D60-2004 are inclined to be safer.
Prestressed concrete cable-stayed bridge Temperature stress Box girder Finite element model Temperature gradient
Qifei Chen Aiqun Li Jianhui Li
College of Civil Engineering, Southeast University, Nanjing 210096, China Engineering Institute of E Engineering Institute of Engineer Corps, PLA University of Science and Technology, Nanjing 210007, C
国际会议
南京
英文
750-754
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）