现役钢筋混凝土梁的受弯区裂缝高度特征试验研究

目前随着桥梁运营时间增加,其承载能力逐渐降低,而交通荷载的不断增长,需要对于桥梁的承载能力进行检测评估,桥梁数量众多,使得快速、准确的评估方法受到关注。裂缝作为钢筋混凝土梁的主要特征,其开展情况能够在一定程度上反映桥梁的真实工作状态。本文依据钢筋混凝土基本原理,通过理论分析裂缝的高度特征参数,利用新旧钢筋混凝土梁的对比试验,总结受弯区裂缝高度特征参数与荷载作用之间的关系,提出了方便检测评估的裂缝高度特征。

Study on Characteristics of Cracks Height on Flexural Sections of Active Service Reinforced Concrete Girders

With the increasing of operation time of bridges, vehicle load increasing and strength of bridges reducing, there are so many bridges need to inspect and evaluate. The rapid and accurate methods are in need. Crack is one of the most important characteristics of reinforced concrete girders. From the details of crack expansion, we can learn about the reality of working state of bridges. According to the basic theory of reinforced concrete structure, the parameters of cracks are calculated. Relations between the characteristic parameter of crack height and loads are given out through the tests of new and old reinforced concrete girders, the characteristic parameter of crack height on bridge inspection ＆ evaluation is brought forward.