Dissertation > Transportation > Road transport > Bridges and Culverts > Investigation, design and calculation > Bridge Design > Damage Analysis and Seismic Design

Seismic Response Analysis of Skew Bridge Road Widening

Author LiHongZuo
Tutor GeYuMei
School Southwest Jiaotong University
Course General and Fundamental Mechanics
Keywords Bridge broaden Splice Xieqiao Shrinkage and creep Seismic Response Analysis Pile - soil - structure interaction
CLC U442.55
Type Master's thesis
Year 2010
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With the rapid development of China 's reform and opening up and economic construction , a large number of roads and bridges, completed and put into operation early difficult to meet the requirements of the growing traffic . Widening of Old Bridge will be more and more present in the face of the builders , roads and bridges in the alteration process tend to be influenced by the surrounding existing buildings , in order to avoid the impact of existing buildings is sometimes necessary to adopt pier twill The special structure . Superstructure construction phase mechanical analysis and bridges overall seismic response analysis has a very important significance of this particular structure . Widen a highway skew bridge skew bridge seismic performance of the stress state of the system conversion stage , and broaden the engineering background to widen the bridge superstructure analysis , the main contents include : 1) bridge widening process precast beam time deposit and beams , bridges simple branched out into consecutive final spliced ??into force changes in the bridge process were analyzed and precast T beams reasonable deposit beam time and Newbridge part in the internal forces of the system conversion stage , displacement to meet the design requirements . 2) were established to consider and not consider pile mechanical model of a soil - structure interaction analysis of bridge vibration characteristics derived by the analysis of the pile - soil - structure interaction makes the bridge span structure becomes soft , the frequency decreases . 3) the use of the response spectrum method and time history analysis seismic response analysis of the bridge , explore the analysis of pile - soil - structure interaction on the seismic response of structures , calculation results show that the pile - soil - structure interaction reduces the bottom of the bridge pier internal forces , increasing the displacement of the top of the bridge piers . 4) the response spectrum and time history analysis method of bridge seismic response characteristics calculated results were compared , the results show that the use of the response spectrum method of bridge earthquake reflect the analysis of the pier displacement , internal force results slightly larger than the time history analysis method results Therefore , the calculated results using the response spectrum method is safe side .

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