Load Testing

What is Load Testing?

Bridge Load Testing

Load testing involves collecting structural responses from a structure under a known, controlled applied load. The load responses can provide insight into the behavior of the structure, help identify and quantify key structural parameters, and can be used as the basis of a refined evaluation of the structure.

Bridge Load Testing

BDI is known throughout the industry as a leader and pioneer for diagnostic bridge load testing. We deploy our in-house manufactured specialized testing system to measure the structural responses while a heavy vehicle of known weight/dimensions crosses the structure without other traffic present. BDI specializes in diagnostic level load tests, which use an operating load to safely evaluate bridge behavior, and extrapolate responses for heavier design, legal and permit loads. BDI also has experience with proof level load testing of bridges based on a variety of codes and methods.

 

Load Testing for Buildings and Other Structures

The general methodologies used for diagnostic-level and proof-level load testing of bridges can also be applied to other structures. To better understand a structure’s behavior under applied load, BDI works with the client to develop and execute a testing plan targeted to provide answers to their structural concerns.

Load Testing for Buildings

What We Measure?

Load testing is a method of measuring real structural responses under an applied load. Utilizing BDI’s in-house systems, we are capable of measuring a multitude of different parameters, including strains, deflections, and rotations. Parameters that can be assessed using these responses include:

  • Load Testing

Effective Material and Member Stiffness

Support Behavior

Live-Load Distribution

Span Continuity

Composite vs Non-Composite Behavior

Contribution of Secondary Members

Blurb: Magnitudes and comparisons between measured and theoretical responses can provide insight on the effective stiffnesses of structural members.

Blurb: Responses near the supports can be used to evaluate the support behavior.

Blurb: Relative response magnitudes across its width can be used to indicate how well the structure distributes live load.

Responses on either side of a support can provide insight on span continuity behavior (intended or unintended)

Responses along the depth of a member can provide insight on the member’s effective neutral axis and in turn composite/non-composite behavior.

Responses along or near secondary members (curbs, parapets, diaphragms) can provide insight on potential participation of these members and their influence on overall load ratings.

What We Deliver

BDI offers flexible bridge load testing and evaluation services to match your project needs: