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碳纤维增强复合材料(CFRP)具有轻质高强、耐腐蚀的特点,比钢更适合用作未来更大跨径悬索桥的缆索体系,以达到经济合理的目的。为了研究CFRP缆索悬索桥的静力性能,初步设计了2座跨径同为2 000m的悬索桥,分别采用传统钢缆索和CFRP缆索,对其在8种典型工况下的静力行为进行非线性有限元分析。分析结果表明:改用CFRP缆索后,大跨悬索桥的主缆拉力降低20%～30%,锚碇所需提供的反力可以减小;全桥温度效应可忽略不计;但由于缆索自重大幅下降,全桥重力刚度下降,加劲梁和索塔在汽车、人群和风荷载作用下的变形量及内力有所增大。
Carbon fiber reinforced composite (CFRP) has the characteristics of light weight, high corrosion resistance and is more suitable than steel for the cable system of future larger span suspension bridges for economic and reasonable purposes. In order to study the static performance of CFRP cable-suspended suspension bridge, two suspension bridges with the same span of 2 000 m were designed. The traditional nonlinear cable and CFRP cable were used respectively and their static behavior under 8 typical conditions was nonlinearly limited Meta-analysis. The results show that the tension of the main cable of the long-span suspension bridge can be reduced by 20% -30% when using CFRP cables, the reaction force provided by the anchorage can be reduced, and the temperature effect of the full bridge can be neglected. However, , The full bridge gravity stiffness decreased, stiffeners and pylons in the car, the crowd and the wind load deformation and internal forces have increased.