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Organization Title

Visualization of Nonlinear Seismic Behavior of the Interstate 5/14 North Connector Bridge

by Robert K. Dowell

Dowell, Robert K. (2005). Visualization of Nonlinear Seismic Behavior of the Interstate 5/14 North Connector Bridge. SMIP05 Seminar on Utilization of Strong-Motion Data, p. 51 - 70.

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Abstract

This paper discusses modifications to the existing bridge visualization program, previously developed by the author, to properly include nonlinear behavior of the 5/14 North Connector bridge expected from future, severe, design-level earthquake motions. Such modifications recognize that nonlinear behavior will develop at predetermined column locations, based on current state-of-the-art seismic design practice. For single-column-bent bridges, plastic hinges are expected to develop at the base of the column in transverse bending and at both ends of the column under longitudinal loading. The bridge can now be viewed in full 3-D animation, developing plastic hinges at all critical locations and showing color-coded damage or ductility levels for transverse and longitudinal behavior for each bridge column. Spline functions were modified from cubic equations representing elastic member response to a combination of plastic and elastic responses.