Apparent thermal coefficient of expansion of concrete building with restraint

Magued Iskander, Saumil Parikh, Walid Aboumoussa

Research output: Contribution to journalArticle

Abstract

The expansion coefficient of a four-story open reinforced concrete parking structure subjected to wide temperature variation was measured. The structure consists of a waffle-slab floor system with regularly placed columns and measures 52.42 ×1.32 m (172 × 234 ft). An expansion joint was instrumented and monitored for 4.5 years. The joint was instrumented using four vibrating wire displacement transducers with integrated temperature sensors. Transducer measurements were recorded hourly. A description of the instrumentation and monitoring results is presented, including annual, seasonal, and daily ranges of movement and the corresponding values of the apparent coefficient of thermal expansion (ACTE) of the constructed structure in service. In general, it was found that values of the annual ACTE were primarily dependent on the degree of restraint and, to a lesser extent, temperature. The measured ACTE ranged from 0.000586 to 0.0793% per 10O°C (0.00032 to 0.044% per 100°F), depending on the temperature and imposed structural restraint.

Original languageEnglish (US)
Pages (from-to)63-70
Number of pages8
JournalACI Materials Journal
Volume109
Issue number1
StatePublished - Jan 2012

Fingerprint

Concrete buildings
Thermal expansion
Transducers
Expansion joints
Parking
Temperature sensors
Temperature
Reinforced concrete
Wire
Monitoring

Keywords

  • Crack meter
  • Elongation
  • Expansion joint
  • Instrumentation
  • Joint meter
  • Monitoring
  • Thermal stresses
  • Vibrating wire displacement transducers

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)
  • Civil and Structural Engineering

Cite this

Apparent thermal coefficient of expansion of concrete building with restraint. / Iskander, Magued; Parikh, Saumil; Aboumoussa, Walid.

In: ACI Materials Journal, Vol. 109, No. 1, 01.2012, p. 63-70.

Research output: Contribution to journalArticle

Iskander, Magued ; Parikh, Saumil ; Aboumoussa, Walid. / Apparent thermal coefficient of expansion of concrete building with restraint. In: ACI Materials Journal. 2012 ; Vol. 109, No. 1. pp. 63-70.
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