[PDF] Top 20 Application of external post-tensioning for strengthening of headstocks (bent-caps) in bridges

... FINAL PROGRAM Fourth International Conference on Concrete under Severe Conditions: Environment and Loading June 27 – July 1, 2004 Lotte Hotel Seoul-Jamsil, Seoul, Korea Seoul National Un[r] ... See full document

... flexural strengthening of reinforced concrete ...bridge headstocks (also known as bent-caps) need to be strengthened for both flexure and shear due to the type of ...the headstocks of Tenthill Creek ... See full document

... External post-tensioning is one of the latest developments in prestressed concrete ...The application of the external prestressing in strengthening leads to a new structural ... See full document

... that bridges of any material can be strengthened by adding external post-tensioning ...with external tendons deflects however, the tendon remains straight between the deviators or ... See full document

... External post tensioning is a common technique to increase the member capacity due to its relatively inexpensive materials and labour ...of external prestressing for flexural ... See full document

... some bridges are frequently being loaded to near to their ultimate design ...shear strengthening of bridge members is important, and why epoxy injection and external post tensioning ... See full document

... Several strengthening techniques are available nowadays and could be applied in masonry arch bridges. A se- lection of them was done after what was found in the literature and is presented in Table 3. The ... See full document

... and strengthening of deteriorating concrete ...all bridges in the ...these bridges are classified as functionally ...in bridges, two alternatives can be considered, such as either demolish and ... See full document

... the application of compressive stresses to concrete ...the application of working loads so that the tensile stresses developed by these working loads are balanced by induced compressive ...strength. ... See full document

... of external prestressing as a means of strengthening or rehabilitating existing bridges has been used in many countries and has been found to provide an efficient and economic solution for a wide ... See full document

... 200,000 bridges in the USA are in need of repair. Most of these bridges have either flexural or shear cracks that need to be repaired to protect the reinforcement from corrosion, and reduce deflections to ... See full document

... the post tensioning will provide a significant increase in ...The application of epoxy injection and post tensioning to the test specimen resulted in a significantly larger increase in ... See full document

... new bridges and evaluation of existing ...The application of reliability methods in the development of a load and resistance factor design (LRFD) bridge ...with post-tension member of different ... See full document

... For all strengthening methods, bond length has a great influence on the flexural performance. As the bond length increases the load carrying capacity increases. The specimens UCB2L700BL, UCB2L650BL, UCB2L600BL, ... See full document

... Two bars for each prestressed beam were used, where these bars were at set positions and the eccentricity of the 2nd order effects caused as the beam deflects were assumed negligible. The prestressing area of the two ... See full document

... Railway bridges under High Speed Trains”, Universal Journal of Mechanical Engineering 2(6): ...girder bridges”, International Journal of Advance Engineering and Research Development, Volume 5, Issue 02, ... See full document

... of bridges help in their proper planning, design and ...of bridges as a result of sediment deposition upstream and inadequate energy dissipation due to skewed hydraulic jump ... See full document

... This chapter outlines the experimental program that was conducted to evaluate the bond and splice behavior of the proposed CFRP strengthening system. The objective of the experimental program is to develop a ... See full document

... given a definite formula for calculating the shear capacity of the bridge after FRP strengthening, but none of them consider the interaction between the FRP and the internal stirrup. After considering the effect ... See full document

... the post-tensioning phase, in order to ensure that such a base was horizontal, and the strings approximatively carried equal tensile ...the post-tension approach to manufacture single prisms, either ... See full document