钢筋混凝土T型梁桥裂缝特征参数与结构评估试验研究

Testing Research on the Relation between the Crack Distinctive Feature and the Structural Performance of Reinforced Concrete T-beams

通过室内钢筋混凝土模型 T梁的荷载试验 ,将裂缝特征统计参数经回归分析并结合结构非线性分析 ,建立了从裂缝统计特征参数推测结构配筋率的方法 ,从而对已严重开裂的钢筋混凝土T型梁桥进行有效评估。将结构外观检查的定性评估提高为定量评估 ,具有重要使用价值。

Many cracks in the existing reinforced concrete T beam bridges with low criterion are found.Based on crack distinctive feature obtained from the reinforced concrete T beam test in the laboratory,the structural steel ratio in reinforced concrete T beams with many cracks can be forecasted by the way of regressive and nonlinear analysis so that their structural performance can be effectively assessed.The method is simple in theory, convenient in application and reliable in precision. This method changes the assessment for structure from qualitative anlysis to the quantitative calculation.