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Dr. Samir Chidiac
B.Eng., M.Eng.,
Ph.D. (McMaster), P.Eng., FCSCE


Office JHE A414
Extension 27768
Email address chidiac@mcmaster.ca


Professor, Civil Engineering



Structures and Earthquake Engineering

Research Interests

  • Structural materials
  • Concrete repair technologies
  • Stone masonry structures
  • Numerical methods
  • Building Science

Specific Research Interests and Activities:

Workability, durability and strength of structural materials

Despite the extensive research work on defining the workability of fresh concrete, proposed test methods have yet to yield consistent rheological properties for the same concrete mix design. The objectives of this research project are two folds. First objective is to quantify the effect of cement type, water, admixtures, and aggregates' size and shape on the rheological properties of fresh concrete, strength and permeation properties.

The second objective is to investigate the relationship between rheological properties of fresh concrete and strength and permeation properties of hardened concrete. This research project comprises of laboratories and field studies together with a mathematical model. The aim is to develop a concrete mix design methodology that includes durability in the design process.

Concrete repair

Performance of the repair material used on bridge decks and parking garages has been inconsistent. Mechanical, chemical and electrical compatibility issues of a repair material are being studied. In addition, the requirement conditions for a stable repair material are being studied to reduce failures of repair materials such as cracking, bond, curling, creep, etc. Research in this area comprises of laboratory and site studies together with theoretical modeling.

Behaviour and rehabilitation of stone masonsry structures

Most stone masonry structures (historic masonry) were built at a time when seismic risk was neither well understood nor even considered in the design specifications. The potential problem magnifies when deterioration of the lime mortar and poor maintenance program are considered. This is an on-going research program in collaboration with Public Work & Government Service Canada with the objective of developing guidelines for assessing and upgrading the structural performance of stone masonry. This research program comprises of developing field and analytical tools to investigate the residual structural capacity of stone masonry and assessing the use of fiber reinforced polymers as repair materials for stone masonry.

Building science

Modeling of coupled heat, air, salt and moisture transport processes and its application to building envelope are essential for understanding the thermal and hygric behaviour and for optimizing the performance of the buildings' envelope. The objective of this research program is to develop a stochastic 3-dimensional, transient numerical model capable of evaluating the behavior of building envelopes and considering temperature, moisture and salt as the major actions contributing to damage. The model will be employed to study air movement through the building envelope as this accounts for 10% to 20% of the total energy use and is the most common source of moisture related building envelope failures.

Publications

  • Elayache, F., Chidiac, S.E., and Kallas, N., "Concrete durability issues for the Gulf region", Proceedings of the ICPCM - A New Era of Building, Cairo Egypt, 2003, 10 pages. (Proceedings did not appear yet).
  • Chidiac, S.E., Maadani, O., Razaqpur, A.G., and Mailvaganam, N.P., "Correlation of Rheological Properties to Durability and Strength of Hardened Concrete", Journal of Materials in Civil Engineering, ASCE, 15(4), 391-399, 2003
  • Ghobarah, A, Ghorbel M.N., and Chidiac S.E., "Upgrading torsional resistance of RC beams using FRP", Journal of Composites for Construction, ASCE, 6(4), 257-263, 2002.
  • Blanchet, L., Chidiac, S.E., and Chui, Y.H., "The establishment of service life and risk assessment for the Rideau Canal NHS of Canada wooden lock gates". Appearing in Proceeding of The 7th World Conference On Timber Engineering, Selangor, Malaysia, August 2002, 8 pages.
  • Chidiac, S.E., "New design concept for durability of concrete". Proceeding of the 3rd Int. Conf on Concrete Under Severe Conditions: Environmental & Loading, Vancouver, June 2001, pp. 819-826.
  • Korany, Y., Drysdale R., and Chidiac S.E.,, "Retrofit of unreinforced masonry builidings: The state-of-the-art". Proceedings of the 9th Canadian Masonry Symposium, Fredricton, New Brunswick, Canada, June 2001, pp. 88 - 15 pages (CD format).
  • Chidiac, S.E., Madaani, O., Razaqpur, A.G. and Mailvaganam, N.P., "Controlling the Quality of Fresh Concrete-A New Approach", Magazine of Concrete Research, 52(5) 353-364, 2000
  • Chidiac, S.E., Foo, S., and Cheung M.S., "Seismic guidlines for stone-masonry components and structures", Proceedings of the Int. Conference on the Seismic Performance of Traditional Buildings, Turkey, November 2000.
  • Books

  • Cheung, M. S., and Chidiac, S. E., "Finite strip analysis of bridges", E & FN SPON, London, First edition, 1996, 347 pages