Seismic Assessment and Retrofit of Pre-Northridge High Rise Steel Moment Resisting Frame Buildings with Bilinear Oil Dampers

Author:

Akcelyan SarvenORCID,Lignos Dimitrios G.

Abstract

This paper presents quantitative information on the effectiveness of seismic retrofit solutions using bilinear oil dampers for seismically deficient existing tall steel buildings. For this purpose, a benchmark 40-story steel space moment-resisting frame building is studied that represents 1970s design practice in North America. Rigorous seismic performance assessment based on ASCE 41 recommendations reveals a high collapse risk for the existing building. The local engineering demand parameters are comprehensively assessed to quantify the impact of seismic retrofit on steel columns and column splices, which are particularly vulnerable due to the time of construction. Multiple retrofit schemes are explored with numerous damping levels and vertical damping distribution methods. The dampers are designed via a recently developed multi-degree-of-freedom performance curves method. A new balanced vertical damping method is proposed to account for the effects of frame inelasticity. This strongly depends on the supplemental damping level, and it determines the effectiveness of the employed vertical damping distribution method. The results indicate that the proposed retrofit strategies can minimize the collapse risk of the tall building. It is shown that the balanced vertical damping distribution method provides the most uniform drift distribution along the building height. Despite the reduction in story drift ratios, the axial force demand in exterior columns remains relatively high in the bottom stories regardless of the seismic retrofit solution. On the other hand, bilinear oil dampers produce relative constant forces despite exhibiting higher velocity demands than expected.

Funder

Fonds de recherche du Québec Nature et technologies

Natural Sciences and Engineering Research Council of Canada

Individual Research Fund of Kadir Has University

internal funding from École Polytechnique Fédérale de Lausanne

Publisher

MDPI AG

Subject

Building and Construction,Civil and Structural Engineering,Architecture

Reference65 articles.

1. Almufti, I., Hutt, C.M., Willford, M., and Deierlein, G. (2012, January 24–28). Seismic assessment of typical 1970s tall steel moments frame buildings in downtown San Francisco. Proceedings of the 15th World Conference of Earthquake Engineering, Lisbon, Portugal.

2. ICBO (1973). Uniform Building Code (UBC) 73, International Conference of Buildings Officials.

3. Estimation of seismic drift demands for frame structures;Gupta;Earthq. Eng. Struct. Dyn.,2000

4. Seismic performance evaluation of pre-Northridge steel frame buildings with brittle connections;Lee;J. Struct. Eng.,2002

5. Near-source ground motion and its effects on flexible buildings;Hall;Earthq. Spectra,1995

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