Theoretical Analysis of Designed Internal Forces of Jiamusi Highway Prestressed Concrete Bridge before Strengthening in China

Abstract:

The objective of this study is to calculate and analyze the internal forces under designed dead and live loads to evaluate the structural performance of corbels and T-shaped cantilever structure of the main span of Jiamusi highway prestressed concrete bridge to evaluate the state of the structural members of the bridge. Two software are used in this analysis. The first software is Dr. Bridge Ver. 2.95 which is used to analyze the internal forces of T-shaped cantilever structure under different load combinations. The second software is Ansys Ver. 10 which is used to analyze the internal forces in the corbel. The results of analysis show that at the dead load stage, the maximum compressive stress at the upper and bottom edge of all sections of T-shaped cantilever structure satisfies the allowable values of standard. The tensile stress doesn’t appear. At the normal service stage, there is enough reserve of compressive stress in the all sections, and the compressive stress is smaller than the allowable value of the standard. There is no tensile stress for all the controlled sections. The maximum main compressive stress and maximum main tensile stress of all controlled sections is smaller than the allowable value of standard. The bending strength of all sections satisfies the allowable values of standard, and there is big reserve of strength. The steel settled in the oblique section of 45° in the web of the corbel has enough reserve for the tensile strength. If the prestressed steel in the corbel is inefficient, the resistance of the oblique section given by the ordinary steel in the corbel and it can be resisted the loads. The longitudinal positive stress of vertical section a-b, vertical shear stress, main tension stress and main tension stress of oblique section a-c of 45 satisfy the allowable values of standard.

• Periodical: Advanced Materials Research (Volumes 189-193)
• Pages: 2353-2361
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.189-193.2353
• Online since: February 2011
• Authors: Ali Fadhil Naser, Zong Lin Wang
• Keywords: Analysis, Bending Moment, Compressive Stress, Deflection, Internal Force, Tensile Strength

References

[1] Educational Program Innovation Center (EPIC), Planning, Design, and Rehabilitation of Bridge, EPIC Learning Centre: 5759 Coopers Avenue, pp.1-6. Mississauga, ON L4Z 1R9, September, (2010).

[2] K. Vladimír, and K. Alena, Theoretical Analysis of RC. Bridges, Prediction of Long-term Behavior Modern Computational Models, Center of Integrated Design of Advanced Structure, This outcome has been achieved with the financial support of the Ministry of Education, Youth and Sports of the Czech Republic, project No. 1M0579, (2005).

[3] L. Duan, Highway Bridge, in AccessScience@McGraw-Hill, ttp: /www. accessscience. com, DOI 10. 1036/1097-8542. 800420, (2008).

[4] JTJ023-85, Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts. People's Republic of China, (1985).