Security Monitoring During Construction Period Of Bridge And Reliability Research Considering Earthquake Action

ABSTRACT:Bridge construction period is growing in recent years, frequent earthquakes, make it necessary to consider the safety of large bridges under seismic. Of this article as a field monitoring personnel, global control of the Beijing urban Yizhuang line 2 through the construction process Liangshui River Bridge, including the elevation monitoring, temperature monitoring, and girder strain monitoring, statistical analysis of the monitoring results obtained:contingency in anticipation of the bridge range, elevation, temperature monitoring the construction of the bridge played a positive role in guiding. In this paper, an idea on antiseismic is proposed and a method of aseismicity is given, Zhejiang Beishan Bridge as examples of the use of MIDAS/Civil software to build a single pier, the longest cantilever, full-bridge three typical construction phase, and level in two directions (along the bridge direction, lateral direction) loading process of earthquake loading, the three models of seismic time history analysis, obtained at different stages of construction of the seismic time history response to pier root, the central pier, pier top, cantilever root, cross-section as the control section, comparative analysis of different construction stages of the control section of the stress, displacement and concluded:Construction of the bridge structure is unstable, compared with the operation of bridges, seismic less capable, more by earthquake damage, for the construction of bridge seismic design criteria of greater significance. Construction is given in structural reliability analysis of three methods to Beishan Bridge as an example, the construction of the reliability analysis.