scholarly journals Structural Health Monitoring of the Scaffolding Dismantling Process of a Long-Span Steel Box Girder Viaduct Based on BOTDA Technology

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Yong Ding ◽  
Feng Xiao ◽  
Weiwei Zhu ◽  
Tao Xia
Keyword(s):  
Health Monitoring ◽  
Strain Distribution ◽  
Time Domain Analysis ◽  
Element Model ◽  
Box Girder ◽  
Bridge Health Monitoring ◽  
Long Span ◽  
Steel Box Girder ◽  
Optical Time ◽  
Distributed Optical Fiber

In this study, a distributed optical fiber sensing technique based on Brillouin optical time-domain analysis (BOTDA) is used to construct a complete bridge health monitoring system by continuously laying distributed sensing fiber lines in a steel box girder. The bridge scaffolding dismantling process is monitored to study the variation of the strain distribution. Additionally, a bridge finite element model is built to simulate the bridge scaffolding removed condition, and the strain distribution of the long-span steel box girder viaduct after scaffolding dismantling is compared with the measured values. This study provides a reference for monitoring the scaffolding dismantling process based on BOTDA technology.

Research on the Fatigue Design Load of Orthotropic Steel Box Girder for Long Span Suspension Bridge

2012 ◽  
Vol 178-181 ◽  
pp. 2365-2368
Author(s):  
Ce Chen ◽  
Bo Hai Ji
Keyword(s):  
Suspension Bridge ◽  
Load Spectrum ◽  
Fatigue Load ◽  
Box Girder ◽  
Traffic Loading ◽  
Long Span ◽  
Vehicle Load ◽  
Steel Box Girder ◽  
Traffic Composition ◽  
Matlab Programming

Traffic composition and the vehicle load were statistically analyzed and a fatigue vehicle load model was established according to the law of equivalent fatigue damage. Based on the MATLAB programming language and the Statistics Toolbox, vehicle fatigue load spectrum was simulated for accurately assessing actual fatigue stress of existing bridge under traffic loading. And the fatigue load could be used in the design for suspension bridge steel box girder.

Modal Analysis of a Simple Supported Beam Steel Bridge Based on ANSYS

2012 ◽  
Vol 594-597 ◽  
pp. 2867-2870
Author(s):  
Dong Li Wang ◽  
Tong Li ◽  
Chun Yu Wang
Keyword(s):  
Modal Analysis ◽  
Health Monitoring ◽  
Element Model ◽  
Rate Of Change ◽  
Mode Shapes ◽  
Steel Bridge ◽  
Bridge Health Monitoring ◽  
Bridge Model ◽  
Set Up ◽  
Index Value

The purpose and significance of bridge health monitoring is described in this paper. In order to study bridge health monitoring, Firstly, a finite element model for simply supported steel beam is set up on the basis of the Infinite Element Theory and the software ANSYS in response to laboratory experient. Through adding instantaneous excitation to the mid-span, do modal analysis for different injury of steel bridge model to reveal the natural frequency and mode shapes of the different injury of steel bridges, identify the different injury by comparing the index value and the rate of change.

Wireless Sensor Network Based Bridge Health Monitoring System for Long-Span Bridges

2014 ◽  
Vol 905 ◽  
pp. 575-579
Author(s):  
Jun Zu Sun ◽  
Qiao Huang
Keyword(s):  
Wireless Communication ◽  
Health Monitoring ◽  
Short Distance ◽  
Wireless Sensor ◽  
Long Distance ◽  
Health Monitoring System ◽  
Long Span Bridges ◽  
Bridge Health Monitoring ◽  
Long Span ◽  
Communication Module

With the convenience to add or replace sensors, to maintain and extend, a new solution of wireless sensor network based bridge health monitoring system for long-span bridges was proposed, which includes advanced and low power-consumption sensors, wide-range short-distance wireless communication module, high-speed long-distance wireless communication module, efficient and practical management software. 433 MHz industrial wireless module was selected for short-distance wireless communication among nodes and between nodes and gateways. 3G WCDMA was chosen for long-distance wireless communication between gateways and the control centers. Whole process controlled management software was specially developed.

Mechanical Analysis of Deck Pavement of Curved Continuous Steel Box Girder

2011 ◽  
Vol 243-249 ◽  
pp. 1941-1946
Author(s):  
Mu Cao ◽  
Guo Fen Li ◽  
Hua Ping Zhu
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Mechanical Analysis ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Steel Box Girder ◽  
Deformation Features ◽  
Stress And Deformation ◽  
Steel Deck

The geometric structure of steel deck plates is complex. So it is difficult to get precise results in the mechanics calculation of deck pavement with traditional methods. This paper adopts the finite element method for the mechanics analysis of the composite guss asphalt surfacing layer of curved steel box girder bridges. By taking the orthotropic steel deck and the pavement as a whole, a reasonable finite element model is established and optimized for the mechanical study of steel deck pavement. This model can be used to study the stress and deformation features of the surfacing layer. According to the common diseases in steel deck pavements and the effect of the overload and the horizontal load in braking to the pavement, this paper puts forward the comprehensive control indicators for pavement failures.

scholarly journals PENENTUAN NILAI DEFLEKSI MAKSIMUM PADA JEMBATAN STEEL BOX GIRDER BERDASARKAN DATA NILAI ROTASI

2021 ◽  
Vol 5 (2) ◽  
pp. 411
Author(s):  
David Surachmat ◽  
Made Suangga
Keyword(s):  
Structural Health Monitoring ◽  
Monitoring System ◽  
Global Positioning System ◽  
Health Monitoring ◽  
Box Girder ◽  
Health Monitoring System ◽  
Structural Health ◽  
Structural Health Monitoring System ◽  
Steel Box Girder ◽  
Global Positioning

Structural health monitoring system plays a crucial role in order to ensure a well-maintained bridge condition. There are a number of methods that may be utilized in order to conduct the monitoring process, namely the use of Global Positioning System (GPS). Despite its accuracy, the use of GPS is deemed costly. A more practical and economical approach to predicting deflection is the use of tiltmeter to obtain rotational values. This research studied the accuracy of simple span steel box girder deflection that is obtained from regression formulae. The analysis showed that a 3D linear and quadratic regression with two rotation data provided the best accuracy if compared with 2D. Keywords: deflection; rotation; structural health monitoring system; tiltmeter AbstrakPemantauan kesehatan struktur jembatan (structural health monitoring system) sangat penting dilakukan untuk memastikan jembatan tetap dalam kondisi yang memadai. Banyak cara yang dapat dilakukan untuk memonitor kondisi jembatan, salah satunya dengan menggunakan Global Positioning System (GPS). Walaupun menghasilkan data yang akurat, penggunaan GPS dipandang menghabiskan biaya yang relatif besar. Adapun solusi yang lebih praktis dan murah untuk memprediksi defleksi yaitu dengan menggunakan tiltmeter dengan data rotasi. Pada studi ini, telah dipelajari tingkat akurasi defleksi jembatan steel box girder dengan bentang sederhana dari hasil persamaan regresi dengan data rotasi. Hasil analisis menunjukkan bahwa model regresi linear dan kuadratik 3D untuk 2 data rotasi memiliki tingkat akurasi lebih baik jika dibandingkan dengan model regresi linear dan kuadratik 2D untuk 2 data rotasi. 

scholarly journals An Automated Inspection Method for the Steel Box Girder Bottom of Long-Span Bridges Based on Deep Learning

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 94010-94023
Author(s):  
Dalei Wang ◽  
Yiquan Zhang ◽  
Yue Pan ◽  
Bo Peng ◽  
Haoran Liu ◽  
...  
Keyword(s):  
Deep Learning ◽  
Automated Inspection ◽  
Box Girder ◽  
Inspection Method ◽  
Long Span Bridges ◽  
Long Span ◽  
Steel Box Girder
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