桥梁结构挠度理论分析和健康监测研究
摘要:桥梁结构在重复荷载和灾害环境的长期作用下,结构性态会发生变异,桥梁结构健康监测可以实时的对桥梁使用情况。本文从理论角度和实测角度分析了桥梁结构的挠度监测技术,分析结果得到:根据二孔连续梁的挠度变形得出了比较简单实用的挠度曲线方程;全站仪挠度观测的试测精度比传统挠度测量精度高,在测量的距离较大的情况下,安置规牌是减小瞄准误差的有效手段;在大跨度桥梁健康检测中,对称加载时,桥梁结构的挠度变形值在跨中最大,实测的挠度在最不利荷载作用是时要小于理论计算的结果,其他位置基本相似,本文的研究结论对对大跨径桥梁的设计和监测提供有力的参考。
关键词: 桥梁结构;扰度;理论分析;健康监测
中图法分类号: 文献标识码: A 文章编号:
Theoretical analysis and health monitoring of bridge structure deflection
Abstract: The bridge structure in the long-term effects of repeated loading and environmental disaster, structural changes, in order to ensure the safety of the bridge in the normal use stage, has very important significance for health monitoring of bridge structure, this paper analyzes the deflection monitoring technology of bridge structure from the angle of theory and actual angle, analysis results are: according to the two hole deflection the continuous deformation of the beam deflection curve equation is relatively simple and practical; the total station distance measurement accuracy, total station deflection observation test precision vernier caliper to measure the value of high precision in measurement, the distance is large, is the effective way to reduce brand placement rules aiming error; in long-span bridge health in the detection, symmetric loading, the maximum deformation of bridge structure deflection at midspan, the most unfavorable loading method, the measu
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