DYNAMIC VEHICLE LOADING ON A SLAB BRIDGE USING MULTIPLE ACTUATORS

An analytical method is presented that approximates passage along a bridge deck of discrete wheel loads by a group of actuators. Actuators are fixed in position but controlled in a sequential manner according to a mathematical algorithm developed from a flexibility matrix approach. As an example, a large-scale laboratory model of a posttensioned flat slab bridge is loaded by an array of four actuators that simulates dynamic movement of a heavy truck. A total of 200,000 cycles of service load is applied to the slab in a region where transverse posttensioning forces impose high gradients of stress. Experimental readings from the laboratory are compared with predictions from numerical simulation. The algorithm can be applied to other types of bridge structures that undergo dynamic traffic loads.

Language

  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 31-31
  • Monograph Title: Steel, concrete, and wood bridges
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00711791
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 25 1995 12:00AM