【作者】 周晶； 范颖芳； 朱彤； 李昕；

【Author】 ZHOU Jing, FAN Ying-fang, ZHU Tong, LI Xin(State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024. China)

【机构】 大连理工大学海岸及近海工程国家重点实验室；

【摘要】 本文对一座服役了三十余年的钢筋混凝土旧拱桥进行了结构损伤诊断,对桥梁进行了现场检测、结构静动力有限元计算和模型试验,三者的结果吻合良好。以大桥的动力特性作为大桥“健康”状况的指纹,尝试利用对主拱圈局部增加质量块改变结构固有频率和振型,得到了不同情况下结构动力特性的演变过程,为在役桥梁结构损伤识别的研究建立了新的基础。更多还原

【Abstract】 Field tests were conducted on a reinforced concrete arch bridge, which has been in service for more than 30 years. FEM analyses were fulfilled for the static and dynamic properties of the bridge. Numerical results achieved by FEM show good agreement with the field test results. Scaled model of one-span bridge was fabricated by organic-glasses. Dynamic tests were performed. It is shown that dynamic properties of the model achieved by the model tests can well reflect the structural dynamic properties. The evolving processes of the structural dynamic properties are derived.更多还原