scholarly journals Inspection and Assessment of Highway Bridges in Jordan along the Desert Highway: A Case Study

2019 ◽  
Vol 09 (03) ◽  
pp. 249-259
Author(s):  
Hamadallah Al-Baijat ◽  
Mohammad Alhawamdeh
Keyword(s):  
Highway Bridges ◽  
Desert Highway

scholarly journals Protecting highway bridges against debris flows using lateral berms: a case study of the 2008 and 2011 Cheyang debris flow events, China

2017 ◽  
Vol 9 (1) ◽  
pp. 196-210 ◽  
Author(s):  
Fei Qiu ◽  
Jianling Huang ◽  
Yange Li ◽  
Zheng Han ◽  
Weidong Wang ◽  
...  
Keyword(s):  
Debris Flow ◽  
Debris Flows ◽  
Highway Bridges

scholarly journals Analysis of strengthening procedures of reinforced concrete highway bridges: a brazilian case study

2019 ◽  
Vol 12 (1) ◽  
pp. 199-209
Author(s):  
D. M. CARVALHO ◽  
J. M. F. CALIXTO
Keyword(s):  
Reinforced Concrete ◽  
Carrying Capacity ◽  
Highway Bridges ◽  
Point Of View ◽  
Structural Systems ◽  
Traffic Characteristics ◽  
Federal Highway ◽  
Brazilian Case ◽  
Highway System

Abstract The Brazilian federal highway system is largely made up of reinforced concrete (RC) bridges built prior to 1984. Thus, these bridges have incompatible geometry and loading carrying capacity with nowadays traffic. In this scenario, the goal of this investigation was the evaluation of the widening and strengthening procedures used in these RC bridges. The study also includes comparing their performance with the respective new bridges built next to them, which received new highway lanes. This comparison is adequate, considering that, both bridges are inserted in the same environment, are subjected to the same traffic characteristics and have similar spans and structural systems. The results obtained allow us to know the effectiveness of the widening and strengthening interventions carried out, from the point of view of durability, contributing to the improvement of future rehabilitation design for reinforced concrete highway bridges.

Generating Labour Cost Budget for a Construction-Oriented Fabrication Facility: Simulation-based Resource Scheduling Approach

2021 ◽  
Author(s):  
Leila Zahedi ◽  
Ming Lu
Keyword(s):  
Discrete Event ◽  
Highway Bridges ◽  
Labour Cost ◽  
Steel Girder ◽  
Event Simulation ◽  
Simulation Based ◽  
The Cost ◽  
The Impact ◽  
Productive Time

A novel labour-hour budgeting methodology is proposed by integrating productivity concepts in project scheduling and budgeting to enhance the accuracy of labour cost budgeting for planning labour-intensive projects. The proposed methodology applies discrete event simulation approach to represent crew formation, labour resource utilization and labour resource flowing between consecutive activities, which allows for quantitatively characterizing the impact of labour semi-productive time on labour cost budgeting as a time-dependent variable. Simulation-based assessment of variations in crew sizes and labour allocations is conducive to reducing semi-productive time and thus enhancing the cost performance of the whole project. The proposed methodology is then applied in a real-world case study for planning steel girder fabrication projects in construction of highway bridges. Not limited to budgeting for labour resources in construction-oriented fabrication facility, the research contributions are also significant to other construction planning settings where limited resources are shared and utilized among different activities.

scholarly journals Seismic Evaluation of an Elevated Highway Bridge in a Low Seismic Region – a Case Study

2010 ◽  
Vol 4 (1) ◽  
pp. 72-87 ◽  
Author(s):  
Ali M. Memari ◽  
Harry G. Harris ◽  
Ahmad A. Hamid ◽  
Andrew Scanlon
Keyword(s):  
Seismic Loading ◽  
Highway Bridges ◽  
Highway Bridge ◽  
Superposition Method ◽  
Seismic Evaluation ◽  
Seismic Region ◽  
Expansion Joints ◽  
Modal Superposition Method ◽  
Seismic Regions

This paper presents the results of the seismic evaluation of an elevated seven-span bridge with tall piers in western Pennsylvania. The bridge was modeled using the SEISAB software, and the analysis used modal superposition method. Various modeling strategies related to piers, abutments, expansion joints, fixed joints, rocker bearings, and hanger supports were studied. Several modeling options were made to capture different behavior responses under seismic loading conditions. The force and displacement demands are compared, and an assessment is made with respect to the potential for damage based on the analysis results. The result of the study shows that for the level of earthquakes expected in the region, columns will not be overstressed. Furthermore, the analysis results show that displacements of the superstructure should not be of concern in light of the fact that there is sufficient bearing seat width and that concrete pedestals have been added in front of the bearing supports to presumably prevent the walking off of the bearing from the support. The study concludes that considering the low level of earthquakes expected in PA, the potential for collapse of the superstructure due to bearing support failure is negligible. The paper contributes to better understanding of the behavior of tall and elevated highway bridges in low seismic regions. The results of the study reinforce the view that decisions on seismic retrofit of such bridges in low seismic regions should not be based on column tie spacing.

scholarly journals Kriging Metamodel-Based Seismic Fragility Analysis of Single-Bent Reinforced Concrete Highway Bridges

Buildings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 238
Author(s):  
Phuong Hoa Hoang ◽  
Hoang Nam Phan ◽  
Duy Thao Nguyen ◽  
Fabrizio Paolacci
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Fragility Curves ◽  
Structural Response ◽  
Highway Bridges ◽  
Fragility Analysis ◽  
Seismic Fragility ◽  
Kriging Metamodel ◽  
Different Sources

Uncertainty quantification is an important issue in the seismic fragility analysis of bridge type structures. However, the influence of different sources of uncertainty on the seismic fragility of the system is commonly overlooked due to the costly re-evaluation of numerical model simulations. This paper aims to present a framework for the seismic fragility analysis of reinforced concrete highway bridges, where a data-driven metamodel is developed to approximate the structural response to structural and ground motion uncertainties. The proposed framework to generate fragility curves shows its efficiency while using a few finite element simulations and accounting for various modeling uncertainties influencing the bridge seismic fragility. In this respect, a class of single-bent bridges available in the literature is taken as a case study, whose three-dimensional finite element model is established by the OpenSees software framework. Twenty near-source records from different sources are selected and the Latin hypercube method is applied for generating the random samples of modeling and ground motion parameters. The Kriging metamodel is then driven on the structural response obtained from nonlinear time history analyses. Component fragility curves of the reinforced concrete pier column are derived for different damage states using the Kriging metamodel whose parameters are established considering different modeling parameters generated by Monte Carlo simulations. The results demonstrate the efficiency of the proposed framework in interpolating the structural response and deriving the fragility curve of the case study with any input conditions of the random variables.

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