论文部分内容阅读
以俄罗斯南萨哈林岛路易斯桥为研究对象,对处于温差大地区服役多年的小跨径钢混结合桥进行了荷载试验和有限元模拟,结果表明在沥青混凝土铺装层厚度较大时,沥青混凝土铺装层的温度由季节温度的变化而改变,从而影响主梁的力学性能。研究发现-5℃时试验荷载作用的实测数据与有限元模拟值误差很小;在相同荷载作用下,沥青混凝土铺装层温度由-24℃升高到+23℃时,主梁竖向位移增大了48.6%,上翼缘压应力增大了275%,下翼缘拉应力增大了25.4%。根据试验可以判断,在夏季温度最高时,桥梁承载能力最低,其研究方法和结果具有一定的参考价值。
Taking the Luis Bridge in South Sakhalin Island, Russia as the research object, the load test and finite element simulation of the small-diameter steel-concrete composite bridge that has been in service for many years in the temperature difference region are carried out. The results show that when the thickness of the asphalt concrete pavement is large, Asphalt concrete pavement temperature changes by seasonal changes, thus affecting the mechanical properties of the main beam. The results show that there is little error between experimental data and finite element simulation at -5 ℃. Under the same load, when the temperature of asphalt concrete pavement rises from -24 ℃ to + 23 ℃, the vertical displacement of main girder Increased 48.6%, the upper flange pressure increased 275%, the lower flange tensile stress increased 25.4%. According to the test, it can be judged that the bridge carrying capacity is the lowest when the temperature is the highest in summer, and the research methods and results have certain reference value.