THREE‐LEVEL PERFORMANCE‐BASED OPTIMIZATION METHOD OF STEEL FRAMES

Authors

  • QIMAO LIU ABB CORPORATE RESEARCH CENTER, VASTERAS, 72226, SWEDEN / DEPARTMENT OF CIVIL ENGINEERING, AALTO UNIVERSITY, ESPOO, 02150, FINLAND

Abstract

THIS PAPER DESCRIBES A THREE-LEVEL PERFORMANCE-BASED OPTIMIZATION MODEL AND AN ESTIMATE METHOD OF RESIDUAL TOP DISPLACEMENT FOR STEEL FRAMES AT THREE EARTHQUAKE LEVELS. THE STEEL FRAMES ARE ELASTIC AT FRE-QUENT EARTHQUAKE, INELASTIC AND HARDENING AT OCCASIONAL AND RARE EARTHQUAKES. THE ESTIMATE FORMULA IS DERIVED AND ESTIMATE PROCEDURE IS GIVEN IN DETAIL. THE ESTIMATE METHOD NEEDS TO DEMONSTRATE A PUSHO-VER ANALYSIS UNTIL STEEL FRAMES YIELD. THE YIELD POINT IS OBTAINED AUTO-MATICALLY IN THE PROPOSED METHOD. THE ESTIMATE METHOD MAKES OPTI-MIZATION PROCESS UNINTERRUPTED. OPTIMAL DESIGN OF A 3-STORY 2-BAY STEEL FRAME IS DEMONSTRATED USING THE PROPOSED METHOD.

Published

2018-03-21

Issue

Section

Articles