Seismic performance and cost-effectiveness of high-rise buildings with increasing concrete strength

Aman Mwafy, Nadeem Hussain, Khaled El-Sawy

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The relationship between the seismic performance and economics of high-rise buildings when designed to different material strengths is investigated in this paper. To represent the modern high-rise construction, five 60-story reinforced concrete buildings with varying concrete strengths, ranging from 45 MPa to 110 MPa, are designed and detailed to fine accuracy keeping almost equal periods of vibration. Detailed fiber-based simulation models are developed to assess the relative seismic performance of the reference structures using incremental dynamic analyses and fragility functions. It is concluded that a considerable saving in construction cost and gain in useable area are attained with increasing concrete strength. The safety margins of high-strength concrete in tall structures may exceed those of normal-strength concrete buildings, particularly at high ground motion intensity levels. The recommendations of this systematic study may help designers to arrive at cost-effective designs for high-rise buildings in earthquake-prone regions without jeopardizing safety at different performance levels.

Original languageEnglish
Pages (from-to)257-279
Number of pages23
JournalStructural Design of Tall and Special Buildings
Volume24
Issue number4
DOIs
Publication statusPublished - Mar 1 2015

Keywords

  • Cost effectiveness
  • High-rise buildings
  • High-strength concrete
  • Incremental dynamic analysis
  • Seismic performance

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction

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