Construction Monitoring Simulation And Stability Analysis In Zhanggongmiao Bridge

In retrospect of the development history of prestressed concrete(PC)bridges,PC bridges,such as urban bridges,highway bridges and bridges crossing mountains and valleys,are widely constructed because of its good spanning capacity.PC bridge is a statically indeterminate structure and its final linetype and mechanical performance are affected by synthetical factors.Therefore,scientific and reasonable construction monitoring on bridges is necessary for keeping construction safety,shaping good linetype and improving mechanical performance.In the engineering background of Zhanggongmiao bridge,the construction-type and structural characteristics of the bridge have been comprehensively considered.Elaborately introducing the existing investigation results on PC bridge will provide a theoretical reference for the construction monitoring of Zhanggongmiao bridge.The main research contents are as follows:In order to clarify the purpose and significance of construction monitoring on PC bridges,the construction history,advantages and disadvantages of PC bridges were comprehensively investigated because of the wide construction of PC bridges.By reviewing and summarizing existing research achievements of the construction monitoring on PC bridges,the.details of construction monitoring were grasped and the different monitoring methods on different kinds of PC bridges were compared,which can provide a significant reference for the construction monitoring on Zhanggongmiao bridge.The construction monitoring theory,construction monitoring analysis and stability analysis theory were comprehensively reviewed and well-studied.Meanwhile,by comparing the difference between existing construction technologies,a good selection of construction monitoring theory,construction monitoring analysis and stability analysis theory for Zhanggongmiao bridge were carried out.The finite element simulation model on Zhanggongmiao bridge using MIDAS/Civil software was established to simulate and analyze the performance of the bridge.The establishment process and all parameter settings of the model were introduced in detail.More precisely,the influences of loads under different construction stages,such as maximum cantilever state,side-span closure state,second side-span closure state,secondary load state and operation state,on deformations and stress condition of Zhanggongmiao bridge were calculated and analyzed with the help of the finite element simulation model.The stability of the main pier of Zhanggongmiao bridge under the dead load of main pier,the operation state and maximum cantilever state were analyzed using the above finite element model.Following that,the aseismatic model of the bridge was established and the seismic response analysis on the bridge was conducted,which can provide a valuable reference for the seismic analysis on similar bridge type.