Analysis Of Seismic Response Of Curved Continuous Beam Bridge And Parameter Analysis Of Limit Device

Bridge plays a very important role in traffic engineering, especially the highway bridge or railway bridge is of great significance to the maintenance of the normal traffic network. In the earthquake, once the bridge is damaged due to the lack of seismic performance, will lead to serious consequences. Bridge as a connecting link between the two sides of the transport hub, when the earthquake hit, it will cause two damage. Falling beam damage is one of the most serious forms of bridge damage, so the research on the failure of the beam is an important issue for experts all over the world. The seismic damage of the beam has been paid great attention by experts both at home and abroad. They have made a lot of research on the seismic damage of the beam, and have achieved good results. At present, the domestic regulation of the anti fall beam system is only as a seismic structural measures, without a precise calculation and design to make it very difficult to really play the effect of anti fall beam in the earthquake.In this paper, based on the characteristics of the highway bridge, the paper discusses the limit device of the anti fall beam system on the basis of the ramp bridge.The main work is as follows:(1) The background and significance of the research on the seismic resistance of bridge are summarized. The current research status of the seismic limit device at home and abroad is analyzed, and the seismic damage of the bridge in the earthquake is analyzed.(2) Further elaborated and analyzed the reason of falling beam damage, summarized the domestic and foreign anti drop beam device status and study the mechanism of continuous girder bridge and discuss limiting device.(3) Summarized several seismic design and analysis methods, through access to a large number of literature and related statistics, the final project based on the use of MIDAS/civil to establish a finite element analysis model. On a three span continuous curved girder bridgemodal analysis to understand the basic dynamic characteristics. Based on this model using dynamic response spectrum method for the analysis of continuous curved girder bridge main seismic parameters(radius of curvature, ground motion excitation angle and bridge pier high)influence on the seismic response and the data for analysis, it is concluded that the change in the law.(4) The anti fall beam system limiting device into the curve beam bridge overall analysis model and consider pier column nonlinearity on the structure model of nonlinear time history analysis; by changing the limit device parameters(initial gap and stiffness) to the analysis of the limiting device parameters on the effect of curve beam bridge seismic performance, and the data comparison analysis to study the inherent law of the influence.(5) The research work and the conclusion of this paper are summarized, and the future research content and work is prospected.