scholarly journals INFLUENCE OF RAILINGS STIFFNESS ON WHEEL LOAD DISTRIBUTION IN THREE- AND FOUR-LANE CONCRETE SLAB BRIDGES

2019 ◽  
Vol 16 (58) ◽  
Author(s):  
Ghassan Fawaz
Keyword(s):  
Load Distribution ◽  
Concrete Slab ◽  
Wheel Load

Wheel Load Distribution in Simply Supported Concrete Slab Bridges

2004 ◽  
Vol 9 (2) ◽  
pp. 147-155 ◽  
Author(s):  
M. Mabsout ◽  
K. Tarhini ◽  
R. Jabakhanji ◽  
E. Awwad
Keyword(s):  
Load Distribution ◽  
Concrete Slab ◽  
Wheel Load ◽  
Simply Supported

INFLUENCE OF RAILING STIFFNESS ON WHEEL LOAD DISTRIBUTION IN TWO-SPAN CONCRETE SLAB BRIDGES

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Sarah Jaber ◽  
Mounir Mabsout ◽  
Kassim Tarhini
Keyword(s):  
Load Distribution ◽  
Concrete Slab ◽  
Wheel Load ◽  
Reinforced Concrete Slab ◽  
Element Analysis ◽  
Analysis And Design ◽  
Design Procedures ◽  
State Highway ◽  
Load Carrying ◽  
Longitudinal Bending

The American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications or LRFD do not account for the presence of railings in the analysis and design of concrete slab bridges. This paper presents a parametric investigation of the influence of railing stiffness on the wheel load distribution in simply-supported, two-equal-span, and one-and two-lane reinforced concrete slab bridges using the finite-element analysis (FEA). A total of 160 bridge cases were modeled and bridge parameters such as span lengths and slab widths were varied within practical ranges. Various railing stiffness were investigated by assuming railings built integrally with the bridge deck and placed on both edges of the bridge. The FEA wheel load distribution and longitudinal bending moments were compared with reference bridge slabs without railings as well as to the AASHTO design procedures. Accordingly, the presence of railings reduced the FEA negative moments by a range of 54% to 72% and the FEA positive moments by a range of 40% to 61% depending on the railing stiffness. This reduction in slab moments due to the presence of railings could be considered an increase in the bridges load carrying capacity. The results of this investigation will assist bridge engineers in better designing and/or evaluating concrete slab bridges in the presence of railings. This could also be considered an alternative for strengthening existing concrete slab bridges.

A Modular Race Tire Model Concerning Thermal and Transient Behavior using a Simple Contact Patch Description

2013 ◽  
Vol 41 (4) ◽  
pp. 232-246
Author(s):  
Timo Völkl ◽  
Robert Lukesch ◽  
Martin Mühlmeier ◽  
Michael Graf ◽  
Hermann Winner
Keyword(s):  
Load Distribution ◽  
Thermal Condition ◽  
Transient Behavior ◽  
Wheel Load ◽  
Contact Patch ◽  
Fundamental Parameters ◽  
Dry Conditions ◽  
Simple Contact ◽  
Tire Forces ◽  
Descriptive Set

ABSTRACT The potential of a race tire strongly depends on its thermal condition, the load distribution in its contact patch, and the variation of wheel load. The approach described in this paper uses a modular structure consisting of elementary blocks for thermodynamics, transient excitation, and load distribution in the contact patch. The model provides conclusive tire characteristics by adopting the fundamental parameters of a simple mathematical force description. This then allows an isolated parameterization and examination of each block in order to subsequently analyze particular influences on the full model. For the characterization of the load distribution in the contact patch depending on inflation pressure, camber, and the present force state, a mathematical description of measured pressure distribution is used. This affects the tire's grip as well as the heat input to its surface and its casing. In order to determine the thermal condition, one-dimensional partial differential equations at discrete rings over the tire width solve the balance of energy. The resulting surface and rubber temperatures are used to determine the friction coefficient and stiffness of the rubber. The tire's transient behavior is modeled by a state selective filtering, which distinguishes between the dynamics of wheel load and slip. Simulation results for the range of occurring states at dry conditions show a sufficient correlation between the tire model's output and measured tire forces while requiring only a simplified and descriptive set of parameters.

scholarly journals Wheel Load Distribution in Four-Sided Concrete Box Culverts

2019 ◽  
Vol 6 (1) ◽  
pp. 17-30
Author(s):  
Elie Awwad ◽  
Mounir Mabsout ◽  
Kassim Tarhini ◽  
Hudson Jackson
Keyword(s):  
Load Distribution ◽  
Wheel Load ◽  
Box Culverts

Effect of Multilanes on Wheel Load Distribution in Steel Girder Bridges

1999 ◽  
Vol 4 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Mounir E. Mabsout ◽  
Kassim M. Tarhini ◽  
Gerald R. Frederick ◽  
Abbas Kesserwan
Keyword(s):  
Load Distribution ◽  
Wheel Load ◽  
Steel Girder ◽  
Girder Bridges ◽  
Steel Girder Bridges

Effect of Potholes on Load Distribution in Concrete Slab Bridges

2004 ◽  
Vol 9 (3) ◽  
pp. 154-159
Author(s):  
Mounir Mabsout ◽  
Kassim Tarhini ◽  
Elie Awwad ◽  
Gerald Frederick
Keyword(s):  
Load Distribution ◽  
Concrete Slab

Investigation of Actual Wheel Load Distribution and Its Practical Implication for Design

2012 ◽  
Vol 18 (33) ◽  
pp. 54-59
Author(s):  
Chang Kook Oh ◽  
Doobyong Bae ◽  
Kee-jeung Hong ◽  
Jaeyoun Choi
Keyword(s):  
Load Distribution ◽  
Practical Implication ◽  
Wheel Load
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