Load testing of a steel beam bridge using acoustic strain gauges

1998 ◽  
Author(s):  
Wayne Clendennen
Keyword(s):  
Strain Gauges ◽  
Steel Beam ◽  
Load Testing ◽  
Beam Bridge

Preparation, Installation and Signal Processing of Strain Gauges in Bridge Load Testing

2015 ◽  
Vol 725-726 ◽  
pp. 903-912 ◽  
Author(s):  
Rok Kamnik ◽  
Boštjan Kovačič ◽  
Andrej Štrukelj ◽  
Nikolay Vatin ◽  
Vera Murgul
Keyword(s):  
Signal Processing ◽  
Time Domain ◽  
Fourier Transformation ◽  
Concrete Beam ◽  
Measured Data ◽  
Strain Gauges ◽  
Fast Fourier Transformation ◽  
Load Testing ◽  
Strain Gauge Sensor ◽  
Bridge Load Testing

Practical approach of strain gauges using is introduced. The use of strain gauges and signal processing of measured data at static experimental load testing of a concrete beam are carried out. The ability of the strain gauge sensor to pick up the specific deformation / strain signals during loading is investigated. The Fast Fourier Transformation (FFT) is applied to obtain the signal in frequency domain and reverse FFT to transform the processed signal back to time domain. The measurements are confirmed with some inductive transducers and total station. This approach is tested on 2.7 m long concrete beam in laboratory. A practical use of strain gauges with bridge constructions under complex inspection is described.

Prestressed Concrete Continuous Beam Bridge Span Arrangement and Structure Size Proposed Analytical

2014 ◽  
Vol 496-500 ◽  
pp. 2516-2519
Author(s):  
Chun Hui Dong
Keyword(s):  
Prestressed Concrete ◽  
Limit State ◽  
Steel Beam ◽  
Live Load ◽  
Cross Sectional ◽  
Bridge Span ◽  
Continuous Beam Bridge ◽  
Stress And Deformation ◽  
Beam Bridge

By analyzing the bridge structure in the course of the dead load and live load, taking into account different load safety factor for load combinations that will limit state as a result of the combination of two kinds of forces calculated tendon force estimates, estimate the various sections of the steel beam, in accordance with certain requirements of the steel beam is a good layout, construction and consider re-simulate prestress for the role of the second combination, the process of the construction and use of a cross-sectional strength checking, stress and deformation checking checking.

Instrumentation Results of New Manual for Assessing Safety Hardware Crash Tested Barriers for William P. Lane, Jr. Bridge

2021 ◽  
pp. 036119812110548
Author(s):  
Travis A Hopper ◽  
Maria Lopez ◽  
Scott Eshenaur
Keyword(s):  
Reinforced Concrete ◽  
Base Plate ◽  
Strain Gauges ◽  
Load Testing ◽  
Steel Rail ◽  
Test Configuration ◽  
Vehicle Impact ◽  
Plate Connections ◽  
Plate Connection ◽  
Deck Slab

Two new bridge barriers were crash tested in accordance with AASHTO Manual for Assessing Safety Hardware (MASH) guidelines for future use on the William P. Lane Bridge over the Chesapeake Bay: (1) a combination barrier consisting of a reinforced concrete parapet with a top steel rail evaluated for Test Level 4 (TL-4); and (2) a combination barrier consisting of a steel parapet with a top steel rail evaluated for test levels TL-4 and TL-5. For the first test configuration, the reinforced concrete barrier was attached to a representative overhang deck slab using anchor rods. In the vicinity of the vehicle impact points, load cells were installed to measure forces in anchor bolts, and strain gauges were attached to reinforcing bars to resolve measured strain data into forces through the overhang deck slab. In the second test configuration, the steel barrier was supported by evenly spaced representative floorbeams using a bolted base plate connection. Strain gauges were attached to elements of the barrier at support locations adjacent to the vehicle impact point to evaluate force transfer through the barrier system into the base plate connections. Linear potentiometers were installed to measure lateral dynamic deflection of the barrier near the vehicle impact region. This paper presents the analysis results of the force, strain, and displacement data measured in the barrier and deck structural components during crash load testing.

Prestressed Concrete Beam Bridge Design and Main Parameters of Prestressed Steel Beam Calculations and Arrangement

2014 ◽  
Vol 496-500 ◽  
pp. 2501-2504
Author(s):  
Xi Jun Yin
Keyword(s):  
Cross Section ◽  
Prestressed Concrete ◽  
Concrete Beam ◽  
Steel Beam ◽  
Prestressed Concrete Beam ◽  
Steel Welds ◽  
Prestressed Reinforcement ◽  
Edge Cracking ◽  
Beam Bridge ◽  
Beam Edge

Prestressed concrete beam bridge cross-section using T-shaped cross-section. Anti-shrinkage reinforcement requirements adopted under the dense arrangement of all the memorial steel welds are double-sided welding, using a special form of prestressed reinforcement arranged in assembly is completed, tension on the deck to prevent the beam edge cracking.

Experimental and computational investigation of a load-posted steel beam bridge

2021 ◽  
Vol 245 ◽  
pp. 112963
Author(s):  
Matthew Stieglitz ◽  
Tevfik Terzioglu ◽  
Mary Beth D. Hueste ◽  
Stefan Hurlebaus ◽  
John B. Mander ◽  
...  
Keyword(s):  
Steel Beam ◽  
Computational Investigation ◽  
Beam Bridge

Load Rating a Prestressed Concrete Double T-Beam Bridge without Plans by Field Testing

2015 ◽  
Vol 2522 (1) ◽  
pp. 90-99 ◽  
Author(s):  
Carlos V. Aguilar ◽  
David V. Jáuregui ◽  
Craig M. Newtson ◽  
Brad D. Weldon ◽  
Tamara M. Cortez
Keyword(s):  
New Mexico ◽  
Prestressed Concrete ◽  
Field Testing ◽  
Concrete Bridges ◽  
Load Rating ◽  
Load Testing ◽  
Prestressing Steel ◽  
Lack Of Information ◽  
Beam Bridge ◽  
T Beam

Bridges with no design plans are an issue in New Mexico because of the many that exist throughout the state. Conventional load rating techniques cannot be used because these bridges have limited or no design documentation. This lack of information has created uncertainties regarding the load-carrying capacity of these structures. Only a few states have formal procedures on how these particular bridges should be load rated. A project was conducted for the New Mexico Department of Transportation to develop a procedure for load rating bridges without plans, including prestressed concrete bridges. In accordance with the AASHTO Manual for Bridge Evaluation, a prestressed concrete double T-beam bridge was evaluated with advanced analyses and experimental methods (including load testing and nondestructive material evaluation techniques). A four-step load rating procedure was implemented that included estimating the prestressing steel by Magnel diagrams, verifying the estimate with a rebar scanner, testing the bridge at both diagnostic and proof loads based on strain measurements, and using the proof test results to rate the bridge. Rating factors and posting loads were determined for AASHTO and New Mexico legal loads. Because of the poor condition of the shear keys (some of which were broken), it is shown that the load distribution between beams was adversely affected and the bridge should be load posted.

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