The Contrast Research Of Reducing Bridge And The Ordinary Bridge

Bridge project as an important part of the lifeline, if damaged in the earthquake, regardless of wound repair and reconstruction, or change lines very difficult to earthquake relief work will have serious implications. Therefore, the structure of the bridge seismic design and analysis is particularly important. Furthermore, the structure in order to ensure earthquake safety, to study the performance of the isolation of great social significance and economic benefits.This paper combines the design issues of isolation on the analysis of continuous beam bridge preliminary study, including the following:1.By a three-span continuous girder bridge of three bridge bearings were used:steel bearing, rubber bearing, lead rubber bearing different designs formed, and the nonlinear time history analysis method to calculate Isolated and non-isolated from the bridge compared to investigate the response of the bridge and non-damping shock absorber bridge differences.2.To study the bearing of lead diameter on structural vibration properties of space-based finite element model,calculations by a large number of bearings in 8 different diameter structure of lead under strong earthquakes effect of reducing isolation for analysis and comparison of the system; consider the structure of the earthquake response rate after the proposed concept of an integrated shock absorption, as a judge bearing damping effect of the standard of lead to get the optimal diameter.3.As the lead rubber bearing characteristics of the hysteretic energy, while using a large flexible structure, the amount needed to become more flexible devices, and digital cable-style beams device common form of isolation system to prevent the earthquake generated when the pier collapsed destruction and the superstructure of bridge.In this paper, with lead rubber bearing a large expansion volume of matched variable bit more flexibility to the cable-type devices and unseating prevention devices made detail, described the isolation system design.4.From the seismic response, safety and economic point of view, a comprehensive analysis of the bridge and non-vibration damping performance when comparing the superiority of the bridge.