Fatigue Analysis of Weld Seam of Steel Box Girder of Jiangyin Bridge Based on Health Monitoring System and BS5400 Code

The fatigue crack propagation and structural health monitoring system of the welds of Jiangyin Bridge were analyzed statistically and the fatigue damage status of each weld survey was evaluated based on BS5400 specification. The results show that the fatigue crack of the weld of Jiangyin Bridge mainly occurs at the fillet welds of the 6th, 8th, 9th and 12th of the heavy lane and the lane. The stress points of the measuring points are mainly in the range of 0 ~ 10MPa, and the fatigue life of each measuring point is more than 100 years, which is located in the U-rib side wall perpendicular to the fillet weld UC-2 measuring point stress amplitude is larger, more prone tofatigue cracks, fatigue life is minimal.

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

Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan ◽

10.24912/jmstkik.v5i2.11014 ◽

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.

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