Effects of seismically induced pounding at expansion joints of concrete bridges

摘要: This paper presents the result of a study on effect pounding at expansion joints concrete bridge response to earthquake ground motions. An engineering approach, rather than continuum mechanics is emphasized. First, dynamic behavior damped multidegree-of-freedom system separated by an joint involving impact examined means finite element method. Second, sensitivity analysis stiffness in gap elements performed. Third, usefulness method for simulation phenomena demonstrated and ductility demands measured terms rotation column ends investigated. Two-dimensional using bilinear hysterestic model substructure nonlinear performed realistic with joint. The effects primary factors demand such as sizes characteristics motion are investigated through parametric study. major conclusions (1) most directly depends size momentum (or magnitude); (2) generally found be negligible wide practical ranges peak acceleration, but potentially significant locations impact.