【摘要】 碳纤维增强复合材料(CFRP)近年来逐步在土木工程领域得到应用，但CFRP材性和钢材差异较大，相关设计理论尚不成熟。提出CFRP索-钢组合张弦梁结构，设计四种温度作用工况，通过有限元模拟对比其与钢索张弦梁结构的力学性能差异。针对其温度效应显著的问题，研究支座约束刚度和结构参数对温度效应的影响，建立温度作用简化模型，提出相应的位移计算公式，并通过有限元参数化分析进行修正和验算。结果表明:CFRP索-钢组合张弦梁结构受力性能良好，CFRP索较钢索具有更好的强度储备;但CFRP索-钢组合张弦梁结构对温度作用敏感，应避免较大负温差作用，设计中须考虑温度影响。增大矢跨比和垂跨比可有效减小温度效应，而温度效应基本不受支座约束刚度影响，支座形式可灵活设计。建立的CFRP索-钢组合张弦梁结构温度作用简化模型合理，相应的位移计算公式准确，可用于指导实际工程设计。更多还原

【Abstract】 Carbon fiber reinforced polymer( CFRP) has seen gradual application in he field of civil engineering in recent years. However,the material properties of CFRP differ significantly from those of steel,the relevant design theories remain immature. A CFRP cable-steel composite beam string structure was proposed. Four temperature load cases were designed to compare the mechanical performance of this structure with that of a steel-cable beam string structure through finite element simulation. To address the significant temperature effects, the influence of support restraint stiffness and structural parameters on temperature effects was investigated. A simplified model for temperature action was established,and a corresponding displacement calculation formula was proposed,which is then calibrated and validated through finite element parametric analysis. The results indicate that the CFRP cable-steel composite beam string structure exhibits good mechanical performance,with CFRP cables offering better strength reserves than steel cables. However,the structure is sensitive to temperature effects,and large negative temperature differences should be avoided,and the influence of temperature should be considered in the design. Increasing the rise-span ratio and sag-span ratio can effectively reduce temperature effects,while these effects are largely unaffected by support restraint stiffness,allowing for flexible suppor design. The established simplified model for temperature action in CFRP cable-steel composite beam string structures is reasonable,and the corresponding displacement calculation formula is accurate. These can serve as a reference for practical engineering design.更多还原