强冲击载荷下钢筋混凝土路面动态响应影响因素敏感度分析

摘要

To obtain the dynamic responses sensitivity of concrete thickness, reinforcement position and longitudinal reinforcement ratio of reinforced concrete pavement under heavy impact loading, its finite element model is established by the concrete damaged plasticity model, the parametric technology is used to calculate main dynamic response influencing factor on the reinforced concrete pavement under heavy impact loading and then according to the obtained results, the sensitivity of each parameter is analyzed. The result shows that the concrete thickness has great influence on loading central maximum settlement and bottom central maximum stress value, next reinforcement position, and then longitudinal reinforcement ratio.%为得到强冲击载荷下，混凝土厚度、钢筋位置及纵向配筋率对钢筋混凝土路面动态响应敏感度，采用混凝土塑性损伤模型，建立了钢筋混凝土路面有限元模型；采用参数化技术，对钢筋混凝土路面在强冲击载荷下动态响应的主要影响因素进行参数化计算，结合计算结果对各参数进行了敏感度分析。分析结果表明：混凝土厚度对载荷中心点最大沉降值及钢筋混凝土板底中心点最大应力值影响较大，钢筋位置次之，纵向配筋率对其无太大影响。