斜腿刚构桥模型试验研究

Experimental Study on Slant-legged Rigid Frame Bridge Model

为了研究斜腿刚构桥的力学特性,制作了1∶100的有机玻璃缩尺模型。通过模型加载试验,测试出模型特征截面的应力及跨中的挠度,通过有限元分析值与理论计算值的对比得出,在弹性范围内,截面应力、挠度测试值与理论计算值、有限元分析值随荷载变化规律一致,模型截面应力及挠度的实测值与有限元分析值基本吻合,斜腿刚构桥模型的受力较合理。

In order to study the mechanical properties of the slant-legged rigid frame bridge, a 1：100 organic glass scale model was made. Through the load test, the stress at the characteristic section of the mod- el and the deflection of the midspan were achieved. By comparing the finite-element value with the theoreti- cal calculation value, we come to the conclusion that in the elastic range the regularities that the section stress, the deflection test value, the calculation value and the value of finite element all varying with the load are consistent; the section stress and deflection test value are basically in agreement with the value of finite element, and the stress system of slant-legged rigid frame bridge is reasonable.