Seismic Performance Evaluation Of Bridge's Horizontal Stopper

In recent years, earthquake disasters in worldwide are increasingly frequent.In bridge engineering, in order to prevent to fall Liang's earthquake damage or to ensure the seismic safety of bridge's bearing, usually set the horizontal seismic measures to limit device.The block as important to prevent the horizontal component off the beam,its mechanical properties and different connection form between it and beam,have the very important influence to the bridge structure under the earthquake action of mechanical behavior.This article is the Shanxi technological project "Bridge Earthquake damage after Shaking Reinforces Handling Technology" a constituent. Depending on Shanxi Province some 1-20 meter simple support beam bridge and a 3×20 meter continuous bridge, we uses the finite element procedure simulation structure separately, in the earthquake drives under the function, in view of stop piece own and with king post between interaction stress characteristic, in the horizontal bridge to the earthquake load function,and analysis when different pillar rigidity between the stop piece and the king post contacts parameters and so on rigidity, primary clearance and contact damping in the horizontal bridge to the earthquake load function, receives the impact force, the king post and Ge to the stop piece the Liang relative displacement, the pillar section bending moment value influence, as well as clings between the king post and the stop piece ceaseless, adds the rubber cushion, the Canadian wooden cushion and reserves the 3cm gap value and so on under four kind of common operating modes, the analysis discussion in 0.1g,0.2g,0.3g and 0.4g and so on under the different seismic motion peak value acceleration, the stop piece receives the time which the impact force, the king post and Ge the Liang relative displacement and the pillar section bending moment's size and the structure destruction condition and the destruction appear., The analysis result indicated that the collision function changed the structure earthquake response condition, produces to the structure stress affects greatly. Of regardless of simple beam continuously Liang, under same earthquake drive, ratio of different contact rigidity and time the pillar rigidity, the stop piece receives biggest impact force after rigidity compared to increases increases first tends to be steady, king post and Ge Liang Jianzui greatly relative displacement along with along with rigidity compared to increases reduces, pillar section biggest bending moment value after rigidity compared to increases increases first tends to be steady; Under the different pillar rigidity, the primary clearance and the Liang stress performance influence's change rule is continuously different to the simple beam, the contact damping is not big to two kind of bridge stress performance's influence. Speaking of the simple beam, between the king post and the stop piece reserves when the 3cm gap the cushion effect achieves best, the structure overall stress performance is best; Speaking of continuously Liang, between the king post and the stop piece clings is ceaseless when the cushion effect to achieve best, the structure overall stress performance is best.This article conclusion may supply the bridge earthquake resistance design reference.