Mechanical Property of Anti-loosening Multi-directional Displacement Comb-plate Expansion Joint
To address the complex engineering requirements of bridge multi-directional displacement,the novel anti-loosening multi-directional displacement comb-plate expansion joint with longitudinal and transverse displacement boxes was proposed.This expansion joint employed the elastic anchoring system composed of high-strength bolts and layered rubber pads,effectively resolving the common issue of bolt loosening in traditional expansion joints.Through the finite element analysis,various operational conditions(e.g.,wheel loads,transverse and vertical displacements of girders)were comprehensively considered.The comparative analysis on mechanical properties was conducted among the anti-loosening multi-directional displacement comb-plate expansion joint and other 3 types of joints,i.e.,the traditional comb-plate expansion joint,expansion joint without longitudinal displacement box,and expansion joint without transverse displacement box.The result indicates that the design of displacement box in the anti-loosening multi-directional displacement comb-plate expansion joint significantly enhances its stability and reliability when the bridge undergoes substantial displacements.Simultaneously,the elastic anchoring system not only effectively reduces the risk of bolt loosening,but also contributes to noise reduction during the expansion joint operation,thereby further enhancing the overall operational safety of bridge and extending the service life of expansion joint.The anti-loosening multi-directional displacement comb-plate expansion joint demonstrates the important application prospects and technical advantages in the field of bridge engineering.
bridge engineeringcomb-plate expansion jointfinite element methodmechanical property analysisanti-looseningmulti-directional displacementnoise reduction
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