Experimental Investigation of a Rapid Calculation and Damage Diagnosis of the Quasistatic Influence Line of a Self-Anchored Suspension Bridge Based On Deflection Theory

ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering Pub Date : 2024-02-27 DOI:10.1115/1.4064845

Q. Gao, Yidian Dong, Tong Wang, Baolong Pang, Shishuo Yang

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Abstract

Based on deflection theory (DT), the basic differential equations and deformation compatibility equations of self-anchored suspension bridges (SASBs) are established. The calculation formula for the stiffening girder (SG) deflection of a three-span SASB is derived, and the validity of the formula is confirmed through an example. In addition, a fast calculation method for the theoretical deflection influence line (TDIL) is proposed by using the deflection calculation formula, and a calculation method for the actual deflection influence line (ADIL) is founded on the concept of time and space coordinate transformation. By loading the bridge with a load car and using real-time monitoring of the displacement response of the bridge test section, combined with the proposed intelligent damage evaluation program, the abnormal situation of the damage of the three-span SASB can be quickly and accurately identified. The research results of this paper can provide flexible, economical and effective guidance for detecting the capacity of real bridges.

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基于挠度理论的自锚式悬索桥准静力影响线快速计算和损伤诊断实验研究

基于挠度理论（DT），建立了自锚式悬索桥（SASB）的基本微分方程和变形相容方程。推导了三跨 SASB 加劲梁（SG）挠度的计算公式，并通过实例证实了公式的有效性。此外，利用挠度计算公式提出了理论挠度影响线（TDIL）的快速计算方法，并基于时空坐标变换的概念提出了实际挠度影响线（ADIL）的计算方法。通过载重汽车加载桥梁，实时监测桥梁试验段的位移响应，结合提出的智能损伤评估程序，可以快速准确地识别三跨 SASB 的损伤异常情况。本文的研究成果可为实际桥梁的承载力检测提供灵活、经济、有效的指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering

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