Cable body damage monitoring method and system for inhaul cable type bridge provided with main longitudinal beams

Abstract

The invention discloses a cable body damage monitoring method and system for an inhaul cable type bridge provided with a main longitudinal beam. According to the method, finite element analysis software, bridge on-site modal monitoring, cable force monitoring and single cable body broken wire test are used; monitoring of inhaul cable type bridge damage conditions is achieved through bridge modal monitoring data, inhaul cable force monitoring data, single cable body broken wire test data and corresponding calculation and analysis theories and simulation methods. By means of the method, the wirebreakage amount of a single cable body can be accurately calculated, the inhaul cable damage condition of the inhaul cable type bridge with the longitudinal beam system can be monitored in real time,an alarm is given timely and accurately once the wire breakage amount exceeds an early warning value, the safety of the inhaul cable type bridge is improved, and potential safety hazards are eradicated.

Description

technical field [0001] The invention relates to the technical field of cable body damage monitoring of cable-type bridges, in particular to a method and system for monitoring cable body damage of cable-type bridges provided with main longitudinal girders. Background technique [0002] Suspenders (also known as cable bodies) are the main force-transmitting components of a suspender arch bridge. The breakage of the suspenders can easily cause the overall collapse of the bridge. Existing bridges usually detect the cable force by the vibration frequency method or monitor the cable force by installing a pressure ring. , but the corresponding relationship between the cable force and the broken wire cannot be obtained, as stated in Section 8.7.2 of "Code for Design of Highway Concrete-filled Steel Tube Arch Bridges" (JTG / TD65-06-2015): The beam (slab) must adopt a continuous structural system, and the main longitudinal beam of the continuous structural system should meet the bearin...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a cable body damage monitoring method and system for cable-type bridges with main longitudinal girders, so as to solve the problem that the amount of broken wires of the cable body cannot be judged only by detecting or monitoring the cable force at present, which leads to the failure of the suspenders. The problem that timely and accurate alarm cannot be carried out when the wire breaks

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