BENCHMARK STRUCTURAL CONTROL MODEL FOR A HIGHWAY BRIDGE

Anil K. AGRAWAL

Associate Professor, Department of Civil Engineering, City College of New York

             Convent Avenue at 140^th Street, New York, NY 10031

Ping TAN

 Post Doctoral Research Associate, Department of Civil Engineering, City College of New York

             Convent Avenue at 140^th Street, New York, NY 10031

Satish Nagarajaiah

Associate Professor, Departments of Civil and Env. Eng. and Mech. Eng. and Mat. Sc., Rice University

             MS318, 6100 Main Street, Houston, TX 77005

Jian ZHANG

Assistant Professor, Department of Civil Engineering, University of Illinois at Urbana-Champaign

205 N. Mathews Avenue, Urbana, IL 61801 

SUMMARY

This paper presents the development of a benchmark structural control model for a highway bridge. The model is based on the newly constructed 91/5 highway over-crossing in southern California. The 91/5 overcrossing is a continuous two-span, cast-in-place prestressed concrete box-girder bridge isolated at the end-abutments and supported at the center bent. A 3-D finite-element model is developed in MATLAB to represent the complex behavior of the full-scale highway crossing. The ground motions are considered to be applied simultaneously in two directions. Control devices are assumed to be installed between the deck and the end-abutments of the bridge. The nonlinear behavior of center columns and isolation bearing are considered in formulating bilinear force-deform relationship, and the soil-structure interaction is also considered herein.  The benchmark model package will allow researchers to investigate the effectiveness of different types of passive, semi-active and active control devices for protection of highway bridges.