Parametric study of the residual strength of deteriorating simply-supported post-tensioned concrete bridges

2001 ◽  
Vol 146 (4) ◽  
pp. 341-352 ◽  
Author(s):  
D. G. Cavell ◽  
P. Waldron
Keyword(s):  
Residual Strength ◽  
Parametric Study ◽  
Concrete Bridges ◽  
Simply Supported ◽  
Post Tensioned

Parametric Study of a Simply Supported Composite Plate Using Finite Element Method

2014 ◽  
Vol 4 (4) ◽  
pp. 26-33
Author(s):  
P.Deepak Kumar ◽  
◽  
Ishan Sharma ◽  
P.R. Maiti ◽  
◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Parametric Study ◽  
Composite Plate ◽  
Simply Supported ◽  
Element Method

Thermal loading of concrete bridges

1984 ◽  
Vol 11 (3) ◽  
pp. 423-429 ◽  
Author(s):  
Malcolm J. S. Hirst
Keyword(s):  
Solar Radiation ◽  
Engineering Design ◽  
Computer Model ◽  
Parametric Study ◽  
Structural Engineering ◽  
Thermal Loading ◽  
Design Method ◽  
Field Measurements ◽  
Concrete Bridges ◽  
Frequency Distributions

This paper presents the results of a parametric study into the thermal loading of concrete bridges by solar radiation. All results were obtained using a computer model calibrated from field measurements. The model computes the loading parameters from the bridge characteristics and the standard daily records of the weather bureau. The design method given uses an effective thickness concept to find the effects of a wearing course on the temperature profile of the underlying bridge. Thermal loading depends on climate and is extremely variable. Histograms are presented, which show the frequency distributions of the loading parameters for sample bridges at three Australian sites covering a range of climatic regimes from tropical to temperate. Key words: bridges, concrete, loads, temperature, solar radiation, structural engineering, design chart.

Feasibility Study of Prestress Force Prediction for Concrete Beams Using Second-Order Deflections

2018 ◽  
Vol 18 (10) ◽  
pp. 1850124 ◽  
Author(s):  
Marco Bonopera ◽  
Kuo-Chun Chang ◽  
Chun-Chung Chen ◽  
Yu-Chi Sung ◽  
Nerio Tullini
Keyword(s):  
Prestressed Concrete ◽  
Concrete Beams ◽  
Flexural Rigidity ◽  
Beam Theory ◽  
Concrete Bridges ◽  
Prestress Loss ◽  
Prestressed Concrete Bridges ◽  
Loss Prediction ◽  
Euler Bernoulli Beam ◽  
Post Tensioned

The safety and sustainability of prestressed concrete bridges can be improved with accurate prestress loss prediction. Considerable loss of the prestress force may imply damages hidden in the bridge. In this study, a prestress force identification method was implemented for concrete beams. Based on the Euler–Bernoulli beam theory, the procedure estimates the prestress force by using one or a set of static displacements measured along the member axis. The implementation of this procedure requires information regarding the flexural rigidity of the beam. The deflected shape of a post-tensioned concrete beam, subjected to an additional vertical load, was measured in a short term in several laboratory experiments. The accuracy of the deflection measurements provided favorable prestress force estimates. In particular, the “compression-softening” theory was validated for uncracked post-tensioned concrete beams.

scholarly journals An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beams

2022 ◽  
Vol 2153 (1) ◽  
pp. 012004
Author(s):  
J F Márquez-Peñaranda ◽  
J R Pineda-Rodríguez ◽  
J P Rojas-Suárez
Keyword(s):  
Structural Steel ◽  
Cost Benefit ◽  
Vertical Displacement ◽  
Steel Beams ◽  
Type I ◽  
Design Standards ◽  
Simply Supported ◽  
Cost Benefit Ratio ◽  
The Cost ◽  
Post Tensioned

Abstract Bridges represent an important application of physics capable of solving real transportation problems. Knowledge of convenience of different mechanical solutions when analyzing and designing bridge is needed. For these reasons, this work is focused on the study of convenience of using two types of bridges. Simply supported short-medium span bridges (30 m to 45 m) are usually excessively long when choosing reinforced concrete solutions and usually short for other types of structures such as cable-stayed or cantilever bridges. The suitability of simply supported bridges leads to the need of studying their cost benefit ratios. This work studies the cost benefit ratio for post-tensioned concrete beams and structural steel girders in simply supported straight bridges. Eight models built of type I sections were used in both cases to analyze the bridges using a software based on the stiffness method. Span of each bridge was set to 30 m, 35 m, 40 m, and 45 m. The convenience of each type of bridge was done comparing the total and the cost per linear meter of each solution (post-tensioned and structural steel). Comparison was done using material consumption, labor, and construction processes costs only. Also, allowable vertical displacement given by current bridge design standards was verified.

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