铁路简支梁桥纵向连续加固模型试验研究

The Model Beam Experimental Research on Longitudinal Continuity Strengthening for Simple Supported Beam of Railway Bridge

对和原型梁比例为１∶５的钢筋混凝土简支梁进行了纵向连续加固前、后的静载试验研究．通过对试验结果对比和分析，简支梁模型经过纵向连续加固后可有效的提高梁的承载能力，增加梁的抗弯刚度，减小梁跨中截面挠度和端截面转角，降低梁跨中截面受压区混凝土的最大压应力和受拉区最外层受拉钢筋的最大拉应力．

A static load experimental research has been performed on reinforced concrete model beams in the proportion 1∶5 with the original beam before and after longitudinal continuity strengthening. Through comparison and analysis, the experimental results, point out that the model beams, after strengthening, the bearing capacity and the bending stiffness are increased, the deflection of the section of span middle and the angle rotation of end section are decreased, and the maximum compression stress of the compressed concrete and the maximum tension stress of the out layer tensile steel in the section of span middle are descended.