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Interaction Analysis of Widened Bridge Structure

Author: GaoXiaoNi
Tutor: HeShuanHai
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: Bridge Engineering Bridge broaden Link up Foundation Settlement
CLC: U441
Type: Master's thesis
Year: 2009
Downloads: 168
Quote: 3
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Abstract

With the rapid development of the highway bridge renovation and expansion is also increasingly onerous task . Although many have been on the bridge renovation and expansion have done a lot of research work , and have a lot of the more successful examples of some of the key technologies has given no clear guidance . This paper west of Tung, and the West Po highway typical bridge as the background, the current bridge broaden the existing problems in the converted broaden the method of the bridge , widen the bridge capacity , the old and the new bridge shrinkage of concrete creep differences , foundation settlement structure and control methods and other research . First, the system introduces the existing bridge broaden and articulation , and comparative analysis of the advantages and disadvantages of each , each to broaden the applicability and convergence method systematically explained on this basis . Combined with relying on the structural characteristics of the project , based on the results presented based on the project the old bridge and widen the part of the upper connection , the lower part of the separation mainly on principles supplemented by the expansion of the lower part of both separation ; followed by Transverse Load passed law analysis and based on internal forces The deformation analysis two ways to widen the bridge capacity analysis . The analysis shows that the old bridge beams under live load deflection and internal forces widened greatly reduce the impact of the different the convergence way of the main beam of the old bridge capacity is not ; shrinkage and creep differences Sommer significant , the the differences widen bridges occur lateral deformation , and farther from the fulcrum section shrinkage and creep of the more significant . Postpone stitching time widening the bridge contraction creep through numerical methods obtained postponed splicing can effectively improve the shrinkage and creep differences widen bridges ; Finally, broaden the the bridges occur foundation settlement of different convergence , the main beam additional internal forces and the settlement difference to broaden the impact of the bridge were studied and given under the combined effect of the live load and foundation settlement , the convergence of the cross-section to allow deformation values ??. In addition , foundation settlement , given the different computational theory , the bridge settlement value , this value and the upper structure subsidence to allow deformation values ??were compared , the final given main beam Cohesion proposals and to eliminate the pile foundation settlement affect the control method .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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