ABSTRACT

Under earthquake, two beams of the aqueduct’s expansion joint may collide; thus, this will endanger the safety of the structure and even lead to girder falling accident. Quite a few studies of this issue use the simple one-dimensional model, but little takes the collision phenomenon under the action of multi-dimensional earthquake into account. According to the Contact-Impact Problems of large-scale aqueduct under earthquake action between the adjacent beam segments, a three-dimensional contact analysis model has been used to simulate the collision phenomenon. And the response of aqueduct structure collision one-dimensional seismic and multidimensional earthquake is compared; the results reveal that the three-dimensional frictional contact impact finite element model can simulate the real aqueduct structure under seismic pounding effect.

摘要

在地震作用下，渡槽伸缩缝的两根梁可能发生碰撞；因此，这将危及结构的安全，甚至导致大梁坠落事故。对此问题的研究不少，采用简单的一维模型，而很少考虑多维地震作用下的碰撞现象。针对大型渡槽在地震作用下相邻梁段之间的接触-冲击问题，采用三维接触分析模型对碰撞现象进行模拟。并比较了渡槽结构碰撞一维地震和多维地震的响应；结果表明，三维摩擦接触冲击有限元模型可以模拟真实的渡槽结构在地震冲击作用下的结构。