Improved Load Rating of an Open-Spandrel Reinforced-Concrete Arch Bridge

2018 ◽  
Vol 32 (4) ◽  
pp. 04018035
Author(s):  
Rafael R. Armendariz ◽  
Mark D. Bowman
Keyword(s):  
Reinforced Concrete ◽  
Load Rating ◽  
Arch Bridge

Failure Mechanism of Reinforced Concrete Rib Arch Bridge under Near-Fault Earthquakes

2011 ◽  
Vol 90-93 ◽  
pp. 940-945
Author(s):  
Wen Jun Gao ◽  
Guang Wu Tang ◽  
Yi Da Kong
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Response ◽  
Plastic Hinge ◽  
Seismic Damage ◽  
Arch Bridge ◽  
2008 Wenchuan Earthquake ◽  
Near Fault ◽  
Pulse Type ◽  
Near Fault Earthquakes ◽  
Far Fault

A typical reinforced concrete rib arch bridge was chosen to investigate its nonlinear response to near-fault ground motions recorded in 2008 Wenchuan earthquake. Results showed that significant seismic damage may occur, maximum demands were higher for near-fault records having forward directive than far-fault motions, and the rotational capacity of rib plastic hinge is not enough for the large compression force of arch rib. While backward-directivity motions, typically do not exhibit pulse-type motions, only have medium seismic damage to the arch bridge.

scholarly journals Evaluation of bearing capacity of reinforced concrete box ribbed arch bridge based on dynamic load test

2021 ◽  
Vol 233 ◽  
pp. 01047
Author(s):  
Mao He ◽  
Xin Fu ◽  
Shunchao Chen
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Load ◽  
Damping Ratio ◽  
Vibration Characteristics ◽  
Load Test ◽  
Driving Safety ◽  
Original Material ◽  
Arch Bridge ◽  
Dynamic Load Test ◽  
And Function

Dynamic load test is to measure the natural vibration characteristics of the bridge structure or the forced vibration characteristics under dynamic load, and to evaluate the driving performance, driving safety and comfort of the bridge through dynamic load test. In order to evaluate the stress state and working performance of a reinforced concrete box-ribbed arch bridge, the load test of the bridge is carried out. Dynamic load test is used to test the inherent fundamental frequency, damping ratio and impact coefficient of the bridge through pulsation test and sports car test. Through the experiment with the key parts of the stress (strain) and displacement load and other important data, through analysis and study, the comprehensive analysis of the phenomenon of calculation and test, a comprehensive performance evaluation structure and function whether meet the design requirements, to provide technical basis for the safety of the bridge operation, and provide the original material for the bridge maintenance and management in the future.

scholarly journals Strengthening of a railway arch bridge from 1854

2018 ◽  
Vol 199 ◽  
pp. 10004
Author(s):  
Ole Viggo Andersen
Keyword(s):  
Reinforced Concrete ◽  
High Speed ◽  
Timber Structure ◽  
Construction Site ◽  
Construction Work ◽  
Arch Bridge ◽  
Freeze Thaw ◽  
Creek Water ◽  
Bottom Slab ◽  
Working Processes

This paper presents the inspection of the condition and the design for strengthening of an existing railway arch bridge constructed in 1854. The original arch bridge is constructed with 5 layers of bricks in the arch and granite blocks in the foundation on top of an arrangement of frame made of timber and carried by piles. From the inspection it was concluded that the bricks in the arch was damaged due to freeze-thaw. It was also concluded that the timber structure in the foundation was rotten. The bridge is crossing a small creek. The environment is very sensitive. The access to the construction site is passing through landscape subject to preservation. The strengthening project included the arrangement of a new reinforced concrete arch. The arch was anchored with glued reinforcement bonded to the existing brick arch. The reinforcement and formwork was placed above the creek without disturbing the fauna in the water. The concrete was pumped into a form under the existing arch. After curing of the concrete arch, the strengthening of the foundation was initiated. It was planned to construct a bottom slab under the creek, which was able to carry the new concrete arch. In order to get access for the construction work the creek water was pumped through pipes suspended under the top of the new concrete arch. The procedures to handle the very delicate situation of replacing the foundation, while the bridge was in operation, and also protecting the environment is described in detail in the presentation. The process included high speed concrete curing, working processes under extreme narrow conditions and a very tight schedule.

Construction Control Analysis of Large Span Reinforced Concrete Arch Bridge

2012 ◽  
Vol 490-495 ◽  
pp. 1186-1190
Author(s):  
Yu Cao ◽  
Yi Feng Zheng ◽  
Xiao Cong Xi
Keyword(s):  
Reinforced Concrete ◽  
Tracking Control ◽  
Construction Control ◽  
Control Analysis ◽  
Construction Process ◽  
Construction Monitoring ◽  
Arch Bridge ◽  
Internal Forces ◽  
Design Requirements ◽  
Main Arch

Construction monitoring of reinforced concrete arch bridge mainly include both the linear of structure and structural stress, comprehensive tracking control must be conducted to make smoothly construction of bridge and meet the design requirements. Taking 2# bridge in International Tourism Resort District of Changbai Mountain as the engineering background, according to features of sub-situ construction control of main arch, a reasonable program of construction control is adopted, to ensure that status of structural internal forces meet the design requirements or in a secure area during the construction process or after completion.

Influence of Cover Soil Depth on the Load Rating of Reinforced Concrete Box Culverts

2015 ◽  
Vol 2511 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Timothy A. Wood ◽  
William D. Lawson ◽  
Priyantha W. Jayawickrama
Keyword(s):  
Reinforced Concrete ◽  
Soil Depth ◽  
Load Rating ◽  
Cover Soil ◽  
Box Culverts

Seismic Response Analysis of Multi-Span Continuous Deck-Type Reinforced Concrete Double Ribs Arch Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1453-1459
Author(s):  
Kai Zhong Xie ◽  
Xian Zhi Huang ◽  
Feng Fan ◽  
Jun Huang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Response ◽  
Response Spectrum ◽  
Response Analysis ◽  
Seismic Action ◽  
Lateral Stiffness ◽  
Vector Method ◽  
Arch Bridge ◽  
Seismic Control ◽  
Arch Effect

Reinforced concrete rib arch bridge is widely used in southwest of china, therefore, it is practically significant to assess the seismic performance of this kind of bridge. In this paper, a deck-type double ribs arch bridge which has eleven large continuous spans is taken for instance. The finite element calculation models for the bridge are established considering arch effect. The M-method principle is used to simulate the pile-soil-structure interaction (PSSI), and multiple Ritz vector method is introduced to analyze the dynamic characteristics. Moreover, the seismic response of arch bridge is analyzed by the response spectrum method. Numeral results show that, the dominant vibration mode of the Multi-span continuous deck-type reinforced concrete rib arch bridge is out-of-plane mode, owing to the weak lateral stiffness. The arch effect can reinforce the longitudinal stiffness of bridge, but weaken the lateral stiffness. Combined with horizontal direction orthogonal seismic action, arch effect can significantly reduce the axial force of rib, while increase the moment and shear of the arch foot and the displacement of the arch. The rib arch, the 1/4 points and the junctions of ribs and beams are the seismic control points. PSSI is the key factor of bridge seismic.

scholarly journals Improved Live Load Distribution Factors for Use in Load Rating of Older Slab and T-Beam Reinforced Concrete Bridges

2021 ◽  
Author(s):  
Faezeh Ravazdezh ◽  
Julio A. Ramirez ◽  
Ghadir Haikal
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Load Distribution ◽  
Load Rating ◽  
Flat Slab ◽  
3D Finite Element ◽  
On Demand ◽  
Load Distribution Factors ◽  
The Impact ◽  
T Beam

This report describes a methodology for demand estimate through the improvement of load distribution factors in reinforced concrete flat-slab and T-beam bridges. The proposed distribution factors are supported on three-dimensional (3D) Finite Element (FE) analysis tools. The Conventional Load Rating (CLR) method currently in use by INDOT relies on a two-dimensional (2D) analysis based on beam theory. This approach may overestimate bridge demand as the result of neglecting the presence of parapets and sidewalks present in these bridges. The 3D behavior of a bridge and its response could be better modeled through a 3D computational model by including the participation of all elements. This research aims to investigate the potential effect of railings, parapets, sidewalks, and end-diaphragms on demand evaluation for purposes of rating reinforced concrete flat-slab and T-beam bridges using 3D finite element analysis. The project goal is to improve the current lateral load distribution factor by addressing the limitations resulting from the 2D analysis and ignoring the contribution of non-structural components. Through a parametric study of the slab and T-beam bridges in Indiana, the impact of selected parameters on demand estimates was estimated, and modifications to the current load distribution factors in AASHTO were proposed.

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