Static and Dynamic Mechanical Properties of Long-Span Cable-Stayed Bridges Using CFRP Cables
Static and Dynamic Mechanical Properties of Long-Span Cable-Stayed Bridges Using CFRP Cables
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大跨CFRP拉索斜拉桥的静态和动态力学性能
DOI：
10.1155/2017/6198296
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发表时间：
2017-01-01
影响因子：
1.8
通讯作者：
Sun Yamin
中科院分区：
文献类型：
--
作者：
Mei Kuihua;Sun Shengjiang;Sun Yamin
碳纤维增强聚合物（CFRP）电缆的弹性模量和自重与钢索不同。因此，碳纤维布斜拉桥的静力和动力性能与钢索斜拉桥不同。采用数值方法对两种跨度为1000m的桥梁的静动力性能进行了研究。分析了几何非线性因素对两种斜拉桥静力性能的影响。分析了两座斜拉桥的活载效应和温度效应。研究了不同结构体系、辅助墩数、索空间布置形式等设计参数对CFRP索斜拉桥动力性能的影响。结果表明，碳纤维布拉索的垂度效应明显小于钢索。碳纤维布斜拉桥的温度效应小于钢斜拉桥。CFRP斜拉桥的竖向弯曲自振频率普遍低于钢斜拉桥，而前者的扭转自振频率高于后者。
The elastic modulus and deadweight of carbon fiber-reinforced polymer (CFRP) cables are different from those of steel cables. Thus, the static and dynamic behaviors of cable-stayed bridges using CFRP cables are different from those of cable-stayed bridges using steel cables. The static and dynamic performances of the two kinds of bridges with a span of 1000 m were studied using the numerical method. The effects of geometric nonlinear factors on static performance of the two kinds of cable-stayed bridges were analyzed. The live load effects and temperature effects of the two cable-stayed bridges were also analyzed. The influences of design parameters, including different structural systems, the numbers of auxiliary piers, and the space arrangement types of cable, on the dynamic performance of the cable-stayed bridge using CFRP cables were also studied. Results demonstrate that sag effect of the CFRP cable is much smaller than that of steel cable. The temperature effects of CFRP cable-stayed bridge are less than those of steel cable-stayed bridge. The vertical bending natural vibration frequency of the CFRP cable-stayed bridge is generally lower than that of steel cable-stayed bridge, whereas the torsional natural vibration frequency of the former is higher than that of the latter.