Seismic Behavior of Precast Concrete Shear Walls with Different Confined Boundary Elements
- 25 Downloads
To ensure the mechanical property of lapped spliced reinforcement and concrete confinement of boundary elements for precast concrete shears, two kinds of constraints, local constraint by additional spiral stirrups placed around each reinforcement splicing and overall constraint by lapped welding closed stirrups replacing traditional stirrups and ties, were proposed in this paper. Low-cyclic reversed loading tests were conducted on three full scale specimens, including one reference cast-in-situ specimen, one precast concrete specimen with local constraint and one precast concrete specimen with overall constraint. By comparing the aspects of strength, stiffness, ductility and energy-dissipation capacity with that of cast-in-situ specimen, it is found that local constraint and overall constraint can be considered equivalent. However, due to the over restraint by local constraint detail, the specimen with local constraint exhibited earlier yielding, poorer energy-dissipation capacity and better ductility than that with overall constraint. Coupled with the consideration of steel usage and construction simplicity, overall constraint detail should be preferred in practical engineering.
Keywordsprecast concrete shear walls boundary elements concrete confinement seismic performance
Unable to display preview. Download preview PDF.
- American Concrete Institute (ACI) (2009). Guide to emulating cast-inplace detailing for seismic design of precast concrete structures, ACI, Farmington Hills, MI, p. 2.Google Scholar
- American Concrete Institute (ACI) (2011). Building code requirements for structural concrete, ACI, Farmington Hills, MI, p. 230.Google Scholar
- Jansson, P. O. (2008). Evaluation of grout-filled mechanical splices for precast concrete construction, Report No. R-1512, Michigan Department of Transportation, Lansing, MI.Google Scholar
- McLean, D. I. and Smith, C. L. (1997). Noncontact lap splices in bridge column-shaft connections, Report No. WA-RD 417.1, Washington State Department of Transportation, Pullman, Washington.Google Scholar
- Park, R. (1989). “Evaluation of ductility of structures and structural subassemblages from laboratory testing.” Bull. New Zealand Natl. Soc. Earthquake Eng., Vol. 22, No. 3, pp. 155–166.Google Scholar
- Wood, S. L., Wight, J. K., and Moehle, J. P. (1987). The 1985 Chile earthquake: observations on earthquake-resistant construction in Viña del Mar, Report UILU-ENG-87-2002, University of Illinois at Urbana-Champaign, Urbana, Illinois.Google Scholar