Research on Optimal Edsign of Beam and Structure Based on Damage-reduction Mode
Plate bearing has the advantages of simple structure and convenient installation.It is widely used in small and medium span girder bridges in China.Under the action of strong earthquake,the bearing is easy to slip or fail,and the risk of falling beam is high.In order to prevent the occurrence of falling beam earthquake damage,anti-falling beam measures are usually added at the end of the beam,but the internal force of the substructure will be significantly increased.Based on the seismic design concept of damage-reduction mode,midas Civil finite element calculation software is used to compare the internal force response,economy,and applicability of the structure under strong earthquake by establishing two working condition bridge models of plate bearing with coupling beam device and HDR isolation bearing.The research shows that the design of the damage-reduction mode of the HDR isola-tion bearing and the beam shelving length is affected by the pier height.For the short-period low-pier bridge,the displacement of the beam end can be well controlled without significantly increasing the in-ternal force of the substructure,the risk of falling beams can be reduced,and better economic benefits are achieved.The improvement effect decreases with the increase of pier height.
万方数据
维普
