Behavior of Reinforced Concrete Structures with External Strengthening of Columns

Authors

  • Weerachai Hirunwattanakasem นักศึกษา หลักสูตรวิศวกรรมศาสตรมหาบัณฑิต สาขาวิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Tanyada Pannachet รองศาสตราจารย์ ภาควิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Maetee Boonpichetvong รองศาสตราจารย์ ภาควิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Panomthep Natepra นักศึกษา หลักสูตรวิศวกรรมศาสตรมหาบัณฑิต สาขาวิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น

Keywords:

Fiber reinforced polymer, Reinforced concrete, Pushover analysis

Abstract

This paper presents a study on dynamic properties and comparison of structural behavior of reinforced concrete buildings strengthened by fiber-reinforced polymer (FRP) jacketing and by reinforced concrete (RC) jacketing. The structures were evaluated according to additional earthquake and analyzed by the pushover analysis. The result indicated that the strengthened structures could resist more lateral load and had higher ductility. The dynamic properties of the FRP-strengthened structures, as well as distribution of the bending moments and the shear forces, did not show any difference from its original structure. Besides higher strength and ductility, higher structural stiffness was also obtained in the RC-strengthened structure. The significant enlargement of the column sections was a cause to change in dynamic properties of the original structure and redistribution of the bending moments and the shear forces, also affecting the other structural members besides the strengthened ones.

References

Janpila A. Seismic hazard assessment in the North-Eastern Area of Thailand [MSc thesis]. Khon Kaen: Khon Kaen University; 2017. Thai.

Department of Public Works and Town & Country Planning. Standard seismic resistant design of building (DPT1302-52). Bangkok: Thailand. 2009. Thai.

Natepra P. Damage Assessment of Deteriorated RC Residential Structures under Possible Earthquake Loading in the Northeastern region of Thailand [MSc thesis]. Khon Kaen: Khon Kaen University; 2019. Thai.

Kaplan H, Yılmaz S. Seismic strengthening of reinforced concrete buildings. In Earthquake-Resistant Structures-Design, Assessment and Rehabilitation. InTechOpen. 2012; 407-428.

Balsamo A, Colombo A, Manfredi G, Negro P, Prota A. Seismic behavior of a full-scale RC frame repaired using CFRP laminates. Engineering Structures. 2005; 27: 769-780.

Tayeh BA, Naja MA, Shihada S, Arafa M. Repairing and strengthening of damaged RC columns using thin concrete jacketing. Advances in Civil Engineering. 2019; 1-16.

The Thailand Research Fund (TRF). Handbook of engineers and technicians. 2016: 41-70.

ACI Committee. Building Code Requirements for Structural Concrete and Commentary (ACI318-19). American Concrete Institute. 2019.

SAP2000 21. CSI, Integrated Software for Structural Analysis and Design", Computers and Structures Inc., Berkeley, CA, U.S.A.

American Society of Civil Engineers. Seismic Evaluation and Retrofit of Existing Buildings (ASCE/SEI 41-13). Reston, VA.: American Society of Civil Engineers. 2013.

Inel M, Ozmen HB. Effects of plastic hinge properties in nonlinear analysis of reinforced concrete buildings. Engineering Structures. 2006; 28(11): 1494-1502.

Lam L, Teng JG. Design-oriented stress-strain model for FRP-confined concrete. Construction and Building Materials. 2003; 17(6–7): 471-489.

Downloads

Published

2021-07-30

Issue

Section

บทความวิจัย