| 在役混凝土拱桥承载能力的鉴定与评估 |
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| 引用本文： | 颜桂云.在役混凝土拱桥承载能力的鉴定与评估[J].福建工程学院学报,2012(1):12-16. |
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| 作者姓名： | 颜桂云 |
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| 作者单位： | 福建工程学院土木工程系 |
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| 基金项目： | 福建省高校服务海西建设重点项目(闽教高(2009)8号);福建省高校专项基金项目(JK2011034);福建工程学院预研项目(GY-Z11069) |
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| 摘 要： | 为检验在役混凝土拱桥的承载能力与动力特性,对某净跨为134.7m的拱桥进行荷载试验。测试结构静态的应变、桥面挠度、拱肋挠度、吊索变形、吊索索力等结构静力反应。同时,测试了结构自振频率、动挠度及加速度等结构动力反应,根据动挠度计算得出冲击系数。将实测值与理论值进行对比分析。结果表明,应变校验系数在0.7～1.0之间,实测的挠度、吊索索力、频率及冲击系数均小于理论值,说明桥梁具有较好承载力和整体竖向刚度较好。试验方法与分析结果为今后评估与鉴定同类型桥梁提供理论依据和技术参考。
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| 关 键 词： | 在役混凝土拱桥 荷载试验 鉴定与评估 |
Assessment and appraisement of bearing capacity for a reinforced concrete(RC)arch bridge |
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| Yan Guiyun.Assessment and appraisement of bearing capacity for a reinforced concrete(RC)arch bridge[J].Journal of Fujian University of Technology,2012(1):12-16. |
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| Authors: | Yan Guiyun |
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| Institution: | Yan Guiyun(Civil Engineering Department,Fujian University of Technology,Fuzhou 350108,China) |
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| Abstract: | Loading tests were made on a reinforced concrete(RC)arch bridge with a span of 134.7 m to examine the bearing capacity and dynamic responses of the bridge structures,The strains,deflections of bridge deck and arch ribs,the deformation and tension of the sling were measured.The dynamic responses of deflections,accelerations and self-vibration frequencies were tested.The impact coefficients were calculated according to the dynamic deflections.The test results show that the testing coefficient of the strain ranges from 0.7 to 1.0,and the values of the measured deflections,tension of the sling and frequencies are also smaller than theoretical values,indicating that the bridge has favourable bearing capacity and vertical stiffness.The results provide theoretical and technical reference for appraising this type of bridge in the future. |
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| Keywords: | existing reinforced concrete(RC)arch bridge loading test assessment and appraisement |
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