01045916

Component

https://doi.org/10.3141/2028-15

http://scholar.google.com...elde&publication_year=2007

Girder displacement is an important component of bridge design and evaluation because it is directly related to bridge stiffness and flexibility. The complex interaction between vehicle and bridge dynamics will result in vibration and deflection greater than that under equivalent static loading. However, field measurement of girder displacement generally is nontrivial. Different sensors and instrumentation systems can be used to measure bridge displacement. Some of these provide direct measurements, whereas others indirectly provide displacement through measurements of the angle of rotation, velocity, or acceleration of the girder. Indirect methods, however, require additional signal processing analyses to remove the effect of small errors in recordings caused by sensor drift, unknown initial bridge conditions, and signal noise. These errors become sufficiently large through successive integrations and greatly distort the integrated velocity and displacement signals. Two correction methods are examined, namely, the velocity estimation method and the linear baseline correction method (BCM), for minimizing such errors in obtaining displacements indirectly from acceleration records. Independently measured girder acceleration and displacement records from a three-span continuous bridge under controlled live load testing are used to evaluate the accuracy of each method. It is found that the linear BCM results in a corrected displacement profile that more reasonably approximates the measured trace under various loading patterns. The choice of integration boundaries is also shown to affect the accuracy of both methods. An objective approach based on the energy content of the signal is proposed.

01089637

English

pp 136-145

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104555

Print

Figures (13) ; Photos; References (16)

Accuracy; Algorithms; Bridge design; Girder bridges; Live loads; Load tests; Mathematical methods; Signal processing

Acceleration records; Correction (Mathematics); Displacement (Structural)

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB, ATRI

Feb 8 2007 8:00PM

• Aesthetics, Design-Build, and Workhorse Bridges
• Alternative Reinforcing Details in Dapped Ends of Precast Concrete Bridge Girders: Experimental Investigation
• Brady Street Posttensioned Concrete Pedestrian Bridge in Milwaukee, Wisconsin
• Design of I-40 Bridges in Guadalupe County, New Mexico
• Development of Live Load Distribution Factor Equation for Girder Bridges
• Effects of Initial Surface Treatment Timing on Chloride Concentrations in Concrete Bridge Decks
• Effects of Multiple Damage–Heat Straightening Repairs on Steel Beams
• Factors Affecting Stress Crack Resistance of Corrugated High-Density Polyethylene Pipe (With Discussion and Closure)
• Fiber-Reinforced Polymer Repair and Strengthening of Structurally Deficient Piles
• Field Tests to Determine Static and Dynamic Response to Traffic Loads of Fiber-Reinforced Polyester No-Name Creek Bridge
• Guideline for Interpreting AASHTO Specifications to Design or Evaluate Buried Structures with Comprehensive Solution Methods
• Impact Echo Data Analysis Based on Hilbert–Huang Transform
• Improving Redundancy of Two-Girder Bridges
• In Situ Materials and Structural Assessment of Stress-Laminated Deck Bridge Treated with Chromate Copper Arsenate
• Load and Resistance Factor Design of Integral Bent Caps
• Longitudinal Progression of Burst Head During Pipe Bursting: Calculation of Pulling Force
• Multiple Presence Statistics for Bridge Live Load Based on Weigh-in-Motion Data
• Performance Evaluation of Concrete Bridge Deck Affected by Chloride Ingress: Simulation-Based Reliability Assessment and Finite Element Modeling
• Reaction Distribution in Highly Skewed Continuous Steel Girder Bridge: Testing and Analysis
• Reliability-Based Procedure for Developing Load and Resistance Factor Seismic Bridge Design Specifications
• Repair and Retrofit Anchorage Designs for Two Texas Department of Transportation Bridge Rails
• Sensitivity Studies of Grout Defects in Posttensioned Bridge Ducts Using Impact Echo Scanning Method
• Soil–Structure Interaction and Imperfect Trench Installations for Deeply Buried Corrugated Polyvinyl Chloride Pipes
• Structured Public Involvement in Context-Sensitive Large Bridge Design Using Casewise Visual Evaluation: Case Study of Section 2 of Ohio River Bridges Project