Study On Construction Process Simulation Test And Seismic Response Of A Self-anchored Suspension Bridge

In recent years, due to the need for economic development, large-span bridgesarein the rapid development of our country. Self-anchored suspension bridge with abeautiful appearance, strong adaptability capabilities, etc., is favored by designers ofall ageswhen selecting bridges. However, a reasonable state of self-anchoredsuspension bridge is designed difficulty, and large displacement nonlinear problem isvery prominent in the construction phase, which lead the construction of the slingtension becomes difficult. The finite element simulation and scale model testing is animportant means to bridge in the state of research and reasonable construction process.In this paper, the author based on an asymmetric single tower self-anchoredsuspension bridge engineering background, designed and produced a scale model,simulated the whole construction process, and carried out several cable tensionoptimization program experimentalverifications. At last, earthquake response of thecontrol and reduction of isolation were discussed, its subsequent shaking table testscarried out some foreshadowing, and the main contents are as follows:1With a single tower suspension bridge as a prototype, according to thegeometric design than the reduced scale of1:20and made its reduced scale test modelof dynamic parameters by scale model testing, and compared to the original bridge tobridge load test the dynamic properties, verified the accuracy of the model reducedscale bridge design and production, and reflect the overall mechanical properties ofthe original bridge.2Utilizing scale model to compare the whole construction process andconstruction process simulation to the original bridge. By monitoring the constructionphase of the original bridge, and in strict accordance with the order of the constructionphase of the original bridge construction design model of the bridge, boom tensioningphased manner to carry out experimental research model to simulate the wholeprocess of construction through. The model bridge into the bridge cable force andgeometry Prototype Bridge and thrust reversers to be compared with the original erroris smaller, which could be a true reflection of the actual construction of the entireprocess.3According to the cable tension optimization theory, design four kinds of slingtension optimization program, and research on its numerical simulation and models.And finally, verified the advantages and disadvantages of different stretchingoptimization programthrough theoretical and experimental study.4. The seismic response of self-anchored suspension and damping isolationbearings based on high seismic isolation control were discussed. Pointed out that in the near-field earthquake excitations, dynamic response is greater than the far-fieldexcitationdue to the self-anchored suspension bridge to long-period structure, and itcould play a role in reducing the isolation effectbased on high-damping isolator.