Prethodno priopćenje
An analysis and optimization of partial stress of temporary blocks in the process of bridge construction using long-span PC continuous beams
Zeng Siyi
; Guangzhou University College of Civil Engineering, Guangzhou, CHINA ; Jiangmen Polytechnic, Jiangmen, Guangdong, CHINA
Guoping Jiang
; School of Engineering, Fujian Jiangxia University, Fuzhou, Fujian 350108, CHINA
Huan Shi
; Guangzhou University College of Civil Engineering, Guangzhou, CHINA
Xiao Sanxia
; School of Engineering, Fujian Jiangxia University, Fuzhou, Fujian 350108, CHINA
Sažetak
Prestressed concrete bridge, made as rigid-frame-continuous combination beams, has a specific structure and method of construction. Continuous beams, bridge piers and beams in particular need to be consolidated temporarily in the process of construction. The structure system of a bridge transforms after the construction of beams has finished. Based on the example of the West River Bridge, this paper discusses the analysis and simulation method of bridge construction with prestressed concrete continuous beams under temporary consolidation. In the condition of the largest cantilever, we calculated and got three-dimensional stress state and deformation of a temporary concrete block, using a finite element model of continuous beam zero block, which was established by methods described in the paper. Then, we analysed the specific location where the stress exceeded the prescribed value. We tried to adjust it, and finally found out an optimal method of adjustment. By adjusting the vertical prestress and the size of a temporary block, this model can simulate stress/deformation state of a temporary block fairly accurately, ensure the construction of continuous beams bridge to be safe in the condition of the largest cantilever.
Ključne riječi
continuous-beams; space simulation; local stress; stress analysis; temporary consolidation; optimization
Hrčak ID:
169845
URI
Datum izdavanja:
21.7.2016.
Posjeta: 736 *