桥梁结构挠度理论分析与健康监测研究.docVIP

桥梁结构挠度理论分析与健康监测研究 摘要：桥梁结构重复荷载与灾害作用，结构性态变异桥梁结构健康监测桥梁本文从理论角度与实测角度分析了桥梁结构的挠度监测技术，二孔连续梁的挠度变形挠度曲线方程对称加载时挠度变形值跨中挠度最不利小于理论计算本文的研究对大跨径桥梁的提供参考。关键词: 中图法分类号: 文献标识码: A 文章编号: Theoretical analysis and health monitoring of bridge structure deflectionAbstract: 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 measured deflection to Less than the results of theoretical calculations, other locations are basically similar, the research conclusions of this paper provide a strong reference for the design and monitoring of long-span bridges. Keywords: Bridge structure; immunity; theoretical analysis; health monitoring 0 引言 桥梁地面交通投资与技术桥梁结构重复荷载与灾害作用，结构性态变异，承载能力下降桥梁结构的安全，经济。随着科技的高速发展，桥梁预应力技术与钢桥技术，大跨度桥梁不断增多，我国的杭州湾跨海大桥跨径达1990m，轻柔化以及规模的大型化是未来桥梁的发展方向，与功能的复杂化方向发展。[1]；泰国的 Rama IX 桥与韩国的 Namhae 桥安装检测系统对桥梁振动与动力特性长期监测的功能[2]；2000 年，美国研究者在commondore Barry 大桥采用 LabView 平台进行检测[3]；我国的桥梁监测在90 年代开始，香港在悬索桥青马大桥上安装传感器，检测荷载与振动响应[4,5]； 秦权给出健康监测的概念与桥梁检测系统的设计原则等[6];李爱群等对于润扬长江大桥斜拉桥进行了健康检测与有限元模型修正[7-9]；邹振祝与杜彦良[10-12]将智能材料与传感器应用到桥梁健康检测中，完成了宪湖长江大桥的检测。 桥梁安全评价的一个重要指标是桥梁挠度，对于挠度的监测，一般采用全人工测量法，满足无法长