SEISMIC DESIGN OF BRIDGE PIERS WITH STIFFENED BOXSECTIONS USING LP PLATES

摘要

Bridge piers with a low structural indeterminacy need to have enough strength and ductility to absorbamounts of seismic energy. It is one of the solution to use Longitudinally Profiled Steel Plate (LP plate)for flanges and webs rather than plates of uniform thickness, allowing a better fitting of the bendingmoment distribution resulting from the applied loading, and thus also a larger spread of the plate yielding.Based upon the results of a series of experimental and analytical studies, this paper presents structuraldesign recommendations for bridge piers with LP plates. Feasibility study is proposed both in strengthand ductility, then in economy in the aspect of cost saving views. Design flow is just the same as that ofpiers with uniform thickness, initially with uniform thickness, then replacing them by LP plates. Thispaper describes following items: (1) Fundamental knowledge of beam-column with LP plates based upona series of testing and analytical works, mainly done in the laboratory of Aichi Institute of Technology; (2)Performance assessment of them, using test mainly conducted in the laboratory of Fukuyama University;and (3) Design and FEM analysis of a rigid frame pier using the testing model followed by a proposal forthe application of LP plates to bridge piers using a few case studies.