Effect of intermediate diaphragms on the load – carrying capacity of steel – concrete composite box girder bridges

2018 ◽  
Vol 122 ◽  
pp. 230-241 ◽  
Author(s):  
Quang-Viet Vu ◽  
Duc-Kien Thai ◽  
Seung-Eock Kim
Keyword(s):  
Carrying Capacity ◽  
Load Carrying Capacity ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Load Carrying

scholarly journals MAINTENANCE AND REPAIR SCHEME FOR CORRODED STIFFENED STEEL BOX GIRDER BRIDGES BASED ON ULTIMATE STRENGTH RELIABILITY AND RISK ASSESSMENTS

2014 ◽  
Vol 6 (3) ◽  
pp. 95-105 ◽  
Author(s):  
Yasser Sharifi ◽  
Jeom Kee Paik
Keyword(s):  
Analytical Formula ◽  
Load Carrying Capacity ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Maintenance And Repair ◽  
Girder Bridges ◽  
Steel Box Girder ◽  
Probabilistic Characterization ◽  
Load Carrying ◽  
Stiffened Steel

The aims of this study are to investigate the effect of corrosion on the load-carrying capacity of stiffened steel box girder bridges and to formulate a repair schedule using reliability-based approaches for such bridges as they age. A credible scenario for a corroded steel box section is estimated. Corrosion rates and their probabilistic characterization are calculated based on the available data. A probabilistic model of ultimate box girder strength is established based on an analytical formula that considers corrosion-related time-dependent strength degradation. The results generated with this model may be useful in the development of an optimized and accurate maintenance and repair schedule for existing steel box girder bridges.

Analytical study on repair method for steel I-girder bridges with corrosion damage considering its structural system behavior

2021 ◽  
Author(s):  
Ryoga Oura ◽  
Takashi Yamaguchi ◽  
Kentaro Arimura
Keyword(s):  
Carrying Capacity ◽  
Corrosion Damage ◽  
Load Carrying Capacity ◽  
Structural Members ◽  
Structural System ◽  
System Behavior ◽  
Girder Bridges ◽  
Load Carrying ◽  
Girder Bridge ◽  
The Individual

<p>Bridges are composed by many structural members which interact with each other to resist against various load combinations. Considering damage repair of one of its structural members, the relationship between the recovery of the individual load-carrying capacity due to the repair of a single member and the improvement of the load-carrying capacity of the structural system is not clear. In the present study, a full-scale FE analysis has been conducted for a steel I-girder bridge system with corrosion damages which have been repaired. The analysis considered, the structural system behavior, varying the repaired areas and the type of patch members. From the analytical results, it was found that, compared to the method in which the damaged portion is completely repaired, the amount of repair can be reduced by taking into account the structural system behavior and partially repair both the damaged and the adjacent intact girders.</p>

scholarly journals EXPERIMENTAL STUDY ON LOAD CARRYING CAPACITY OF COMPOSITE HYBRID STEEL BOX GIRDER WITH RC/SW SLAB USING HIGH PERFORMANCE STEEL

2006 ◽  
Vol 62 (3) ◽  
pp. 643-655
Author(s):  
Taro TONEGAWA ◽  
Tomoki URANO ◽  
Kunitomo SUGIURA ◽  
Takashi YAMAGUCHI ◽  
Eiichi WATANABE ◽  
...  
Keyword(s):  
Experimental Study ◽  
Carrying Capacity ◽  
High Performance ◽  
Load Carrying Capacity ◽  
Box Girder ◽  
Steel Box Girder ◽  
Load Carrying ◽  
High Performance Steel

Structural tests on 43- and 45-year-old pre-stressed concrete bridge for reinforcement effect of PSC-I girders reinforced by external strand tendons

2021 ◽  
Author(s):  
Hyun-Joong Kim ◽  
Young Suk Park ◽  
Chul Young Kim ◽  
Seung Hee Kwon
Keyword(s):  
Carrying Capacity ◽  
Load Test ◽  
Flexural Behavior ◽  
Structural Behavior ◽  
Load Carrying Capacity ◽  
Reinforcement Effect ◽  
Girder Bridges ◽  
Standard Design ◽  
Load Carrying ◽  
The 1960S

<p>In this study, the flexural behavior of pre-stressed concrete-I (PSC-I) girders was investigated to intuitively and more accurately evaluate the structural behavior and load-carrying capacity increase of PSC-I girder bridges more than 40 years old and reinforced by the external pre-stressing (PS) tendon reinforcement method. Many bridges in South Korea, which were constructed after the 1960s, exhibit a significantly low load-carrying capacity due to aging and the application of loads that are different from originally designed loads. To improve the load-carrying capacity and working load of these old bridges, reinforcement methods that use external PS tendons have been conventionally used. However, the evaluation of the load-carrying capacity of a bridge and the calculation of the number of external tendons for reinforcement are performed through the vehicle load test within the working load range of the bridge. Most of the studies conducted so far have been limited to the calculation of the loss of the members required for the reinforcement of the bridge or their structural behavior. In this study, a flexural failure verification experiment was performed on PSC-I girder bridges that were constructed based on the standard design of the 1960s to verify the reinforcement effect of PS tendons. The target of the experiment was the girders of PSC-I girder bridges designed more than 40 years ago based on the working loads of DB-18 and DB- 24.</p>

Influence of Yield Strength Variability over Cross-Section to Steel Beam Load-Carrying Capacity

2005 ◽  
Vol 10 (2) ◽  
pp. 151-160 ◽  
Author(s):  
J. Kala ◽  
Z. Kala
Keyword(s):  
Yield Strength ◽  
Cross Section ◽  
Carrying Capacity ◽  
Bending Moment ◽  
Statistical Characteristics ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Strength Variability ◽  
Hot Rolled ◽  
Hot Rolled Steel

Authors of article analysed influence of variability of yield strength over cross-section of hot rolled steel member to its load-carrying capacity. In calculation models, the yield strength is usually taken as constant. But yield strength of a steel hot-rolled beam is generally a random quantity. Not only the whole beam but also its parts have slightly different material characteristics. According to the results of more accurate measurements, the statistical characteristics of the material taken from various cross-section points (e.g. from a web and a flange) are, however, more or less different. This variation is described by one dimensional random field. The load-carrying capacity of the beam IPE300 under bending moment at its ends with the lateral buckling influence included is analysed, nondimensional slenderness according to EC3 is λ¯ = 0.6. For this relatively low slender beam the influence of the yield strength on the load-carrying capacity is large. Also the influence of all the other imperfections as accurately as possible, the load-carrying capacity was determined by geometrically and materially nonlinear solution of very accurate FEM model by the ANSYS programme.

Fuzzy Sets Theory in Comparison with Stochastic Methods to Analyse Nonlinear Behaviour of a Steel Member under Compression

2005 ◽  
Vol 10 (1) ◽  
pp. 65-75 ◽  
Author(s):  
Z. Kala
Keyword(s):  
Fuzzy Sets ◽  
Carrying Capacity ◽  
Stochastic Methods ◽  
Nonlinear Behaviour ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Input Parameters ◽  
Stochastic Solution ◽  
Fuzzy Solution ◽  
Sets Theory

The load-carrying capacity of the member with imperfections under axial compression is analysed in the present paper. The study is divided into two parts: (i) in the first one, the input parameters are considered to be random numbers (with distribution of probability functions obtained from experimental results and/or tolerance standard), while (ii) in the other one, the input parameters are considered to be fuzzy numbers (with membership functions). The load-carrying capacity was calculated by geometrical nonlinear solution of a beam by means of the finite element method. In the case (ii), the membership function was determined by applying the fuzzy sets, whereas in the case (i), the distribution probability function of load-carrying capacity was determined. For (i) stochastic solution, the numerical simulation Monte Carlo method was applied, whereas for (ii) fuzzy solution, the method of the so-called α cuts was applied. The design load-carrying capacity was determined according to the EC3 and EN1990 standards. The results of the fuzzy, stochastic and deterministic analyses are compared in the concluding part of the paper.

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