自锚式混凝土吊桥的力学性能研究

Mechanical properties of self-anchored concrete suspension bridge

通过对一座跨径240m自锚式混凝土吊桥的静、动力分析,研究了非线性、主缆矢跨比、主梁拱度、温度以及混凝土收缩徐变等因素对自锚式混凝土吊桥的受力影响.结果表明:自锚式混凝土吊桥基本满足弹性理论,混凝土收缩徐变对结构受力影响较大,主缆矢跨比越大,结构刚度越大;与同等条件的传统吊桥比较,自锚式混凝土吊桥具有良好的动力特性.

The static and dynamic analysis of a self-anchored concrete suspension bridge of 240 m in span, including the study on the effect of nonlinearity, rise-span ratio of the main cable, camber of stiffening girder, temperature, shrinkage and creep of concrete on the internal force of self-anchored concrete suspension bridge indicate that the self-anchored concrete suspension bridge satisfies in general the simple elastic theory; Shrinkage and creep of concrete affect much on the structure; The stiffness of the structure increases with the rise-span ratio of main cable, and the self-anchored concrete suspension bridge has better dynamic properties in comparison with conventional suspension bridges.