Reducing the Seismic Vulnerability for RC Buildings by Using Steel Bracing Elements

Open access

Abstract

This article aims to highlight, through a comparative study, the efficiency of steel bracing systems used to reduce seismic vulnerabilities in existing buildings with reinforced concrete structures (reinforced concrete frames and reinforced concrete dual structures, general building structures including those used in transport infrastructure). In order to simplify the calculations, the analysis was reduced to the study of the behavior of resistance lines corresponding to four-, nine- and fifteen-level buildings with the same plane distribution. In order to obtain features similar to those of existing building elements, structures were initially loaded with seismic forces corresponding to code P13-63. The next step was to apply to previously dimensioned structures the seismic loads according to P100-3: 2008 in relation to P100-1: 2013, thus obtaining the deficiencies of the existing structures against the requirements of these norms. Correction of these strength and stiffness deficiencies was attempted by introducing X-shaped centric brace systems. The bracing systems used as consolidation methods are of three types: direct bracings stuck in the reinforced concrete frames and bracings of the indirect type, made of internal and external bracing steel frames. Structural calculations were made in the linear elastic field using the ETABS program.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] Bush TD Jones EA Jirsa JO. Behavior of RC frame strengthened using structural-steel bracing. J Struct Eng-ASCE 1991;117(4):1115–26

  • [2] Badoux M Jirsa JO. Steel bracing of RC frames for seismic retrofitting. J Struct Eng-ASCE 1990;116(1):55–74

  • [3] Mario D’AnielloSteel Dissipative Bracing Systems for Seismic Retro fitting of Existing Structures: Theory and Testing

  • [4] Dr. Durgesh C RaiReview of Documents on Seismic Strengthening of Existing Buildings Department of Civil Engineering Indian Institute of Technology Kanpur

  • [5] Elizabeth A.Jones James O. JirsaSeismic Strengthening of a reinforced concrete frame using structural steel bracing

  • [6] M.A. Youssef H. Ghaffarzadeh M. Nehdi - Seismic performance of RC frames with concentric internal steel bracing

  • [7] Viswanath K.G Prakash K.B. Anant Desai-Seismic Analysis of Steel Braced Reinforced Concrete Frames

  • [8] Marc Eric BadouxSeismic retrofitting of seismic reinforced concrete structures with steel bracing systems

  • [9] Ciro Faella Carmine Lima Enzo Martinelli Roberto Realfonzo - Steel bracing configurations for seismic retrofitting of a reinforced concrete frame – Structures and Buildings – Volume 167 Issue SB1 – ICE proceedings 2014

  • [10] http://www.nexus.globalquakemodel.org/gem-building-taxonomy/overview/glossary/braced-frame-lfbr

  • [11] P100-3:2007 Code for evaluation and design of consolidation works on existing seismically vulnerable buildings

  • [12] P100-1:2006 Design provisions for buildings

  • [13] SR EN 1993-1-1 Eurocod 3 Design of steel structures. Part 1-1: General rules and rules for buildings

Search
Journal information
Metrics
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 21 21 21
PDF Downloads 17 17 17