scholarly journals Development of heavy truck models and their effects on girder bridges

2021 ◽  
Author(s):  
Lang Liu ◽  
◽  
Lexian Zhang ◽  
Jie Wang ◽  
Hong Yang ◽  
...  
Keyword(s):  
Bending Moment ◽  
Highway Bridges ◽  
Load Effect ◽  
Girder Bridges ◽  
Heavy Trucks ◽  
Bridge Model ◽  
Potential Factor ◽  
Heavy Truck ◽  
Beam Bridge ◽  
T Beam

The traffic on highway bridges has been increasing in both volume and magnitude, which even has become one of the main reasons leading to damages and collapse of bridges. Most of the existing regulations for overloading checking are carried out based on various limits of gross vehicle weights and axle loads. However, the results of relevant researches show that weight is only a potential factor but not the dominating factor in threatening the safety of bridges. In this study, the concept of load-effect-based heavy truck is proposed for overloading checking, and then three years of WIM data were collected and used to develop heavy truck models for each truck type, based on the understanding of the characteristics and configurations of heavy trucks as well as the distribution of their main parameters. Furthermore, the typical heavy truck models selected and their possible combinations are applied to a simply supported pre-stressed concrete T-beam bridge model with three loading levels, considering one-lane, two-lane and three-lane loaded respectively, then the induced load effect, deflection and stress are discussed for 20 loading cases. The results show the bending moment caused by heavy trucks moving on multiple lanes is 1.6 times the value of the standard truck model in Chinese specification, and the eccentric loading due to a very heavy vehicle moving on single lane usually lead to more severe effect.

The Disease Treatment Measures and Intensification of Reinforced Concrete T-Shaped Girder Bridges

2012 ◽  
Vol 532-533 ◽  
pp. 321-324 ◽  
Author(s):  
Ya Xun Yang ◽  
Zhi Kui Yang ◽  
Chao Qiao
Keyword(s):  
Reinforced Concrete ◽  
Detailed Analysis ◽  
Prestressed Concrete ◽  
Bridge Construction ◽  
Disease Treatment ◽  
Girder Bridges ◽  
Good Economy ◽  
Treatment Measures ◽  
Beam Bridge ◽  
T Beam

Reinforced concrete and Prestressed concrete T-beam bridge are widely used because they have the features of good economy and easy construction in bridge construction. However, with the increase in traffic and the growth of hours of operation, diseases like the increase of the deflection in this bridge,the more cracks,etc.,are being emerging gradually.According to the disease of Chun Ma Bridge while that is being used, we have made a detailed analysis,and proposed purposeful measures to deal with the disease as well as the design to reinforce the bridge,solved the problem of the safety in the bridge operation. This article have made a good in-depth discussion and analysis on the T-beam retrofitting,and it will have a guidance significance for the similar bridges in the future.

Dynamic Test and Analysis of Curved Steel Box Girder Bridges

2005 ◽  
Vol 1928 (1) ◽  
pp. 165-173 ◽  
Author(s):  
Dongzhou Huang
Keyword(s):  
Dynamic Loading ◽  
Bending Moment ◽  
Highway Bridges ◽  
Impact Factors ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Steel Box Girder ◽  
The Impact ◽  
Curved Steel

This paper presents experimental and analytical impact factors for two existing curved steel box girder bridges. A Florida Department of Transportation test truck with a total weight of 468.8 kN applied the dynamic loading. The truck speed was incrementally increased from crawl to design speed. To evaluate the test results, the truck was simulated as a nonlinear vehicle model with 15 degrees of freedom. The bridge deck surface was assumed to be good and was simulated as a random process. Test and analytical results show that the impact factors of torsion are normally less than 30%, as are the impact factors of bending moment for bridges with span lengths less than 39 m. The impact factors of vertical shear are generally less than 15%, as are the impact factors of bending moment for bridges with span lengths greater than 50 m. The current AASHTO Guide Specifications for Horizontally Curved Highway Bridges appears to overestimate the dynamic loading of curved steel box girder bridges, especially for bridges with span lengths greater than 50 m. The research results are instructive and applicable to both bridge design and bridge load rating.

Research for Vehicle Load and Load Effect After Earthquake Based on Simply Supported Beam Bridge

2013 ◽  
Vol 671-674 ◽  
pp. 1362-1366
Author(s):  
Peng He ◽  
Sheng Jin Ge ◽  
Min Gang Zhai
Keyword(s):  
Theoretical Basis ◽  
Yunnan Province ◽  
Highway Bridges ◽  
Distance Ratio ◽  
Simply Supported Beam ◽  
Load Effect ◽  
Simply Supported ◽  
Vehicle Load ◽  
Rare Earthquake ◽  
Beam Bridge

Monte-Carlo was applied to generate random traffic flow after frequent, moderate and rare earthquake respectively based on sample of vehicle investigation in“907”Zhaotong, Yiliang earthquake (2012), Yunnan province, considering vehicle parameters, such as types, driving, distance, ratio in earthquake-relief campaign. Vehicle load effect was analyzed for different spans of Simply Supported Beam Bridge, then characteristic value of lane loading which ruled by 《General Code Designs of Highway Bridges and Culverts(JTG D60-04)》(China) was revised. Research can not only provide standard for rapid estimate and repair of bridge after earthquake, but also give theoretical basis for revising anti-seismic codes or guidelines in China.

scholarly journals Development of Brazilian highway live load model for unlimited fatigue life

2020 ◽  
Vol 13 (4) ◽  
Author(s):  
Anselmo Leal Carneiro ◽  
Enson de Lima Portela ◽  
Túlio Nogueira Bittencourt
Keyword(s):  
Fatigue Life ◽  
Bending Moment ◽  
Highway Bridges ◽  
Live Load ◽  
Box Girders ◽  
Load Effect ◽  
Load Model ◽  
Weigh In Motion ◽  
Bias Factor ◽  
Live Load Model

Abstract This work studies the fatigue live load model used in Brazil for highway bridges. Using the unlimited fatigue life approach, the current live load model is evaluated in relation to the actual traffic and a new fatigue live load model is proposed. Weigh-in-motion (WIM) stations data on two important Brazilian highways are used. The main structural analysis performed in this paper consider the bridges as box girders or multiple girders. The ratio between real traffic and the live load model load effect (bias factor) are determined for single and continuous spans in terms of bending moment and shear force. It is found that the bias factor of the current live load can vary a lot and may not ensure unlimited fatigue life. The proposed model, on the other hand, presents more uniform bias factors and is in accordance with the unlimited fatigue life approach for the WIM data.

Review of Design and Analysis of Box Girder Bridges And T-Beam Bridges Using IRC Codes

2020 ◽  
pp. 184-189
Author(s):  
Shubham Sirse ◽  
Kuldeep R. Dabhekar ◽  
Isha P. Khedikar ◽  
M. B. Saiwala
Keyword(s):  
Torsional Stiffness ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Analysis And Design ◽  
Girder Bridges ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Beam Bridge ◽  
T Beam

Bridge is the structure which is used for carrying the traffic over the valley or river by connecting highways or railways. There are types of bridges which are T-beam bridges and box girder bridges where the T-beams are effective in resisting bending providing ductility to the bridges. While box girders gives high torsional stiffness providing ductility, stability and also aesthetics. Different codes with varying design philosophy are used for designing these bridges such as IRC:21-2000 and IRC:112-2011. Hence the purpose of this paper is to compare the results of analysis and design of different papers performed using these codes for both the types of bridges i.e. T-beam and box girder bridge. Various researchers studies are available on the design and analysis of T-beam bridge and box girder bridge using IRC:112-2011 and IRC:21-2000. The purpose of this study is to determine the most economical and preferable design code for both T-beam bridges and box girder bridges.

The Study of Diaphragm Beam Influence to Load Transverse Distribution of T-Beam Bridge

2011 ◽  
Vol 368-373 ◽  
pp. 557-562
Author(s):  
Guo Hui Gao ◽  
Zhen Yu Xie ◽  
Ran He ◽  
Jian Yi Song
Keyword(s):  
Theoretical Data ◽  
Mechanical Analysis ◽  
Concentrated Load ◽  
Transverse Distribution ◽  
Finite Element Software ◽  
Bridge Model ◽  
Diaphragm Beam ◽  
Beam Bridge ◽  
Bridge Models ◽  
T Beam

Diaphragm beam has grate influence to load transverse distribution factors of T-beam bridge. Two steel T-beam bridge models were made in this article, one have diaphragm beam and the other one have not. Concentrated load was applied to both of them, and mechanical analysis of the T-beam bridge model was carried out by finite element software. Compared with experiment data and theoretical data, it shows that: when the concentrated load was applied to mid-span of 1#,2# and 3# beam of the two kind bridges, the 1#,2# and 3# beam load transverse distribution factors of T-beam bridge without diaphragm beam is larger than that of T-beam bridge with diaphragm beam by 19.3%~23.2%、25.3%~30.6% and 48.1%~50.1% respectively.

Comparative Study of T Beam Bridge with Conventional Method and Finite Element Analysis

2019 ◽  
Vol 15 (1) ◽  
pp. 62-70
Author(s):  
Raghabendra Yadav ◽  
Binay Kumar Sah ◽  
Indra Narayan Yadav ◽  
Dinesh Kumar Gupta
Keyword(s):  
Finite Element ◽  
Conventional Method ◽  
Concrete Slab ◽  
Bending Moment ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Analysis And Design ◽  
Finite Element Software ◽  
Beam Bridge ◽  
T Beam

The most commonly and popular type of bridge used in Nepal is T beam bridge due to it's simple in design, construction and maintenance than other types. T-beam Bridge comprises of a concrete slab integral with girders. This type of bridges is more preferred when it comes to connectivity to short distances. So, it is necessary to update the analysis and design methods. Here, in this paper, there is an attempt to study the comparison of maximum bending moment due to live load in a girder and slab bridge for varying span length as 15m, 20m and 25m respectively of T Beam bridge using conventional method. The same bridge is analyzed as a three-dimensional model in finite element software as SAP2000, apply the same loading done for conventional methods and compared the results. The maximum bending moment results obtained from finite element model are lesser than Courbon's method which looks more conservative.

scholarly journals Effects of Blast Loading on Prestressed Girder Bridges

2012 ◽  
Vol 19 (1) ◽  
pp. 1-18 ◽  
Author(s):  
William F. Cofer ◽  
Debra S. Matthews ◽  
David I. McLean
Keyword(s):  
Prestressed Concrete ◽  
Critical Role ◽  
Blast Loading ◽  
Highway Bridges ◽  
Element Model ◽  
Concrete Bridges ◽  
September 11Th ◽  
Girder Bridges ◽  
Bridge Model ◽  
Precast Prestressed Concrete

Since the events of September 11th, increased attention has been given to the effects of blast loading on structures. Bridges are especially important due to their potentially critical role in the economy and for emergency response. Prestressed concrete highway bridges are very common, representing 11 percent of state bridges nationwide. Yet, very little is known about how prestressed concrete bridges respond to blast loading.A finite element model of a precast, prestressed concrete girder was created and validated with two experimental blast tests. It was found that for an explosive event above or below the girder, numerical and empirical results were consistent.The girder model was expanded to a four-girder, simple-span bridge model. Three different scenarios were examined at the midspan of the bridge: a blast between two girders above the deck, a blast centered on a girder above the deck, and a blast beneath the deck. The two load cases from above resulted in highly localized damage with the possibility for other sections of the bridge to be immediately reopened after the event. Results for the load case from below indicate that the slab will be heavily damaged but the girders will remain intact.

Load and resistance data for precast stringer highway bridges

2006 ◽  
Vol 33 (11) ◽  
pp. 1368-1378 ◽  
Author(s):  
Daman K Panesar ◽  
F Michael Bartlett
Keyword(s):  
Dynamic Load ◽  
Bending Moment ◽  
Highway Bridges ◽  
Normal Weight ◽  
Unit Weight ◽  
Statistical Parameters ◽  
Concrete Core ◽  
Load Effect ◽  
Reliability Indices ◽  
Resistance Data

Statistical parameters for the load effects and resistances of precast "type G" stringer bridges erected in Alberta since the late 1950s are presented to assist practicing engineers assessing similar bridges using the mean load method. The load effect data include unit weight data for normal weight and two lightweight concretes; traffic volumes, gross vehicle weights, and single, tandem, and tridem axle weights observed on primary, secondary, and local roads; and dynamic load allowances for shear and bending moment on short span bridges. Extreme annual traffic loads are derived. The resistance data include compressive and tensile strengths of normal weight and two lightweight concretes and yield strengths for corroded and uncorroded reinforcing steel. Additional statistical parameters are presented to account for other readily discerned bridge-specific idealization factors that affect the reliability indices. Professional factors for flexural and shear resistance are derived using experimental data reported from past investigations of type G stringers by others.Key words: concrete, core tests, corrosion, dynamic load allowance, material properties, single axles, tandem axles, tridem axles, reliability.

Study on Damage Effect of Concrete Bridge Model under Blast Loading

2015 ◽  
Vol 777 ◽  
pp. 116-120 ◽  
Author(s):  
Lei Chen ◽  
Tian Hua Jiang ◽  
Jie Gong ◽  
Lu Jun Cai
Keyword(s):  
Rapid Development ◽  
Blast Loading ◽  
Damage Effect ◽  
Bridge Structure ◽  
Bridge Model ◽  
Bridge Damage ◽  
Beam Bridge ◽  
The Impact ◽  
T Beam ◽  
Damage Rule

With the rapid development of transportation, the vulnerability of bridge under blast loading has more and more attracted people's attention. To ensure the safety of the bridge under the impact of blast loading is very important. This article describes the current situation of bridge structure antiknock research in China and other countries. What’s more, pointed out the shortcomings of existing research and presented that the antiknock research of bridge structure should combine numerical simulation with model test at the same time. This article researches the stress, strain and bridge damage rule of 1: 5 model of T-beam Bridge under explosion effect of small doses explosive.

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