• Chunwei Li Northeast Forestry University, Department of Civil Engineering, 26 Hexing road, Harbin, PR China
  • Haitao Yu Northeast Forestry University, Department of Civil Engineering, 26 Hexing road, Harbin, PR China
  • Dongzhe Jia Northeast Forestry University, Department of Civil Engineering, 26 Hexing road, Harbin, PR China
  • Quansheng Sun Northeast Forestry University, Department of Civil Engineering, 26 Hexing road, Harbin, PR China




External prestress, Cable-stayed bridge, Reinforcement, filed test


This article relies on the reinforcement project of the Mulinghe cable-stayed bridge to explore the changes in the mechanical properties of the reinforced concrete cable-stayed bridge before and after reinforcement. The bridge has large cable spacing, large internal force of a single cable, and the main beam is mainly Reinforced Concrete. Therefore, structural calculation, disease analysis, and damage state simulation are carried out. Afterwards, the bridge's commonly used reinforcement methods were compared, and suitable reinforcement schemes were selected. After the reinforcement, the field test was carried out on the cable-stayed bridge, the main beam deflection, the strain of the main beam and the main tower, and the increase in the cable force of the cable- stayed were analyzed. The results show that external prestressed reinforcement is the best way, which can significantly reduce the vertical displacement of the main beam and the horizontal displacement of the main tower, and also improve the stress on the upper and lower edges of the main beam. After the external prestressed reinforcement, the ratio of the observed value to the observed value in the filed load test of the cable-stayed bridge's decreased significantly. It is up to 31% increase in bending capacity of main beams and up to 24% increase in stiffness. This article is instructive for the reinforcement of the early-built sparse-cable reinforced concrete cable-stayed bridge, while also expanding the scope of implementation of external prestressed reinforcement technology.


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Chen hao,2015.Calculation and analysis of prestressed concrete cable-stayed bridge and its reinforcement scheme.Southwest Jiaotong University.

Pan Zhulan,Zhao Changjun,Lou liang,2011. Design and Construction of Cable Replacement of Zhangzhen Cable-stayed Bridge.Highway, vol. 08 : 89-92.

Lei Jinsheng,Wang Yongfei,Dai Xiaodong,2010. Maintenance and reinforcement design of the main bridge of Changsha Yinpenling Xiangjiang River Bridge. Highway Engineering, vol. 35(04):97-99+115.

Zhou Zexi,Chen Yunhai,2014. Analysis of the whole process control of cable-stayed bridge construction, maintenance and reinforcement. Journal of Highway and Transportation Research and Development, vol. 31(04):100-105.

J. Guo, Wancheng Yun,2019.Cable force optimization of a curved cable-stayed bridge with combined simulated annealing method and cubic B-Spline interpolation curves.Engineering Structures, vol.201:109813.

Wu Zhongxin,Sheng Haijun,2013. Construction monitoring technology for reinforcement and reconstruction of cable-stayed bridge. Highway, vol.01:100-103.

Qiao Changjiang,2010. Research on Cable Replacement Technology of Prestressed Concrete Cable-stayed Bridge. Huazhong University of Science and Technology.

Liu Huichao, 2015. Research on Strengthening Technology of Prestressed Concrete Continuous Beam Bridge. Chang’an University.

Jia Libo, 2012. Analysis of Active Reinforcement Methods of Prestressed Concrete Monolithic Box Girder Bridges with Small and Medium Spans. Chang’an University.

Song Guangjun,Hua Longhai,2014. Analysis of Cracks in Diaphragm of Steel Box Girder of a Cable-stayed Bridge and Research on Reinforcement.Bridge Construction, vol. 44(04):107-111.

Niu Bin,1999. Analysis of Bending Performance of External Prestressed Concrete Beam. China Civil Engineering Journal, vol. 04:3-5

Liu Hang,Gao Huizong,Yang Xuezhong et al,2012. Post-tensioned external prestress reinforcement technology and its engineering application. Architecture Technology, vol. 43(01):49-52.

Angel C. Aparicio, Gonzalo Ramos, Juan R. Casas,2002.Testing of externally prestressed concrete beams, Engineering Structures , vol.24:73-84.

Ghallab A H , Khafaga M A , Farouk M F ,et al, 2013. Shear behavior of concrete beams externally prestressed with Parafil ropes. Ain Shams Engineering Journal, vol.4(01):1-16.

Tiejiong,Loua,Sergio,M.R.Lopes,2012.Numerical analysis of behaviour of concrete beams with external FRP tendons.Construction and Building Materials, vol.35:970-978.

Dong Bin, 2009. Experimental Study on Strengthening of Concrete Beams with External Prestress Considering the Influence of Secondary Axial Force. Tianjin University.

Qu Dechao, 2013. Research on Strengthening of External Prestress of Reinforced Concrete Continuous Curved Beam Bridge. Harbin Institute of Technology.

Lv Liang,Jia Yi,Ji Yuntao,2019. Evaluation of Bearing Capacity of Double-Tower Partial Cable-stayed Bridge Based on Load Test. Journal of Architecture and Civil Engineering, vol.36(03):101-109.

Liu Yongjian,Yang Jian,Liang Peng et al,2009. Load test of cable-stayed bridge without backstay leaning tower. Journal of Chang’an University(Natural Science Edition), vol.29(05):59-63.

Alemdar Bayratar,Temel Turker,et al,2017.Static and dynamic field load testing of the long span Nissibi cable-stayed bridge. Soil Dynamics and Earthquake Engineering, vol.94:136-157.

Dall'Asta A , Ragni L , Zona A, 2007 . Simplified Method for Failure Analysis of Concrete Beams Prestressed with External Tendons. Journal of Structural Engineering, vol.133:121-131.

Richard Andrew Barnes, Geoffrey Charles Mays,2006. Strengthening of reinforced concrete beams in shear by the use of externally bonded steel plates: Part 1- Experimental programme. Construction and building materials, vol.20: 396-402.

Bimal Babu Adhikary, Hiroshi Mutsuyoshi,2006. Shear strengthening of RC beams with web-bonded continuous steel plates, Construction and Building Materials, vol.20:296-307.

Zhang D, Ueda T, Furuuchi H, 2012. Concrete cover separation failure of overlay-strengthened reinforced concrete beams. Construction & Building Materials, vol.26(01):735-745.

Liu Chuanle,Zhang Guogang,2018. Static load test study on a super long-span suspension bridge spanning cable crane. Journal of China and Foreign Highway , vol.38(05):105-108.

Liu Kai,Pei Bingzhi,Zhang Menzhe et al,2019. Research on Reasonable Distribution of Girder Section Rigidity and Bearing Capacity in the Region Around Steel-Concrete Joint Section of Hybrid Girder Cable-stayed Bridge. Journal of China and Foreign Highway, vol.39(06):66-72.




How to Cite

Li, C., Yu, H., Jia, D., & Sun, Q. (2021). EVALUATION OF THE EFFECT OF EXTERNAL PRESTRESSED STEEL STRANDS ON CABLE-STAYED BRIDGES BASED ON FINITE ELEMENT ANALYSIS AND STATIC TEST. Stavební Obzor - Civil Engineering Journal, 30(1). https://doi.org/10.14311/CEJ.2021.01.0024