首页|基于荷载试验的双幅连续箱梁桥承载力评估

基于荷载试验的双幅连续箱梁桥承载力评估

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为全面评估某双幅连续箱梁桥实际承载力是否满足设计和使用要求,确定桥梁实际运营情况,基于静载试验测定该桥各工况下测试截面应变与挠度,观察桥梁开裂情况.结合动载试验测定桥梁模态参数和动力响应,运用有限元软件进行数值模拟分析,对比分析实测值与计算值,分析挠度和应变校验系数、相对残余位移(应变)、自振频率及冲击系数等参数对桥梁承载力的影响.结果表明,该桥梁结构强度具有一定富余度,刚度富余度不足,试验荷载下整体结构接近弹性工作状况.因此,该桥实际承载力无法满足设计要求,建议加固补强桥梁上部结构.
Evaluation of Bearing Capacity for Continuous Box Girder Bridge Based on Load Test
In order to comprehensively evaluate whether the actual bearing capacity of a pair of continuous box beam bridges meets the design and use requirements,the actual operation of the bridge is determined.Based on the static load test,the strain and deflection of the test section under various operating conditions of the bridge are measured,the cracking of the bridge is observed.Combined the modular parameters and power response of the bridge in combination with the dynamic carrier test,using finite element software for numerical simulation analysis,the real measured value and calculated value are compared and analysed,the effects of deflection and strain verification coefficients,the relative residual displacement(strain),autobiography frequency,and impact coefficients on the bearing capacity of the bridge are analyzed.The results show that the strength of the bridge structure has a certain margin but the stiffness margin is insufficient,the overall structure is close to the elastic working status under the test load.Therefore,the actual bearing capacity of the bridge can not meet the design requirements,it is recommended to strengthen the upper structure of the bridge.

bridgestestsbearing capacityverification coefficientimpact coefficientdynamic response

李德权、杨建荣、黄华

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昆明理工大学建筑工程学院,云南 昆明 650500

中国电建集团华东勘测设计研究院有限公司,浙江 杭州 311122

桥梁工程 试验 承载力 校验系数 冲击系数 动力响应

国家自然科学基金中国电建集团华东勘测设计研究院有限公司科技项目

52068037KY2019-JG-09

2024

施工技术(中英文)
亚太建设科技信息研究院 中国建筑设计研究院 中国建筑工程总公司 中国土木工程学会

施工技术(中英文)

影响因子:1.244
ISSN:2097-0897
年,卷(期):2024.53(8)
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