Doctoral Dissertations


Song Wang


"This study presents an experimental investigation on durability of fiber-reinforced polymer (FRP) confined concrete cylinders subjected to various environmental conditions. Two types of cylinders were tested in this experiment: concrete-filled FRP tube (CFFT) and hollow-core FRP-concrete-steel (HC-FCS), with FRP tubes having two different constitutive resin components: polyester and epoxy. The specimens were subjected to three different environmental conditions: combined freeze/thaw, wet/dry and heating/cooling cycles with options of continuous water immersion and sustained axial load in an environmental chamber, UV exposure in an UV chamber, and seawater immersion in water tanks with sustained axial load. Mechanical and material characterization tests were conducted on the conditioned specimens to evaluate any degradation due to conditioning. Results of environmental chamber experiment showed both polyester-based CFFT and HC-FCS were slightly degraded in strength, but significantly degraded in strain capacity. Epoxy-based CFFT cylinders, however, were barely affected by the environmental conditions in both strength and strain capacities. Additional continuous water immersion and sustained axial load caused further deterioration on both strength and strain of cylinders. On the other hand, both polyester-based CFFT and HC-FCS cylinders after seawater immersion demonstrated continuous degradation on both strength and axial strain capacities as the immersion time and ambient temperature increased. The polyester-based CFFT and HC-FCS bridge columns built in marine environment with annual seawater temperature of 55°F were estimated to be degraded by 12% and 40% in strength after 50 years, respectively"--Abstract, page iv.


ElGawady, Mohamed

Committee Member(s)

Schonberg, William P.
Yan, Guirong Grace
Chandrashekhara, K.
Birman, V. (Victor)


Civil, Architectural and Environmental Engineering

Degree Name

Ph. D. in Civil Engineering


Missouri University of Science and Technology

Publication Date

Spring 2018

Journal article titles appearing in thesis/dissertation

  • Effects of combined environmental exposures and axial load on CFFT
  • Durability of hollow-core GFRP-concrete-steel columns (HC-GFCS) under severe weather conditions
  • Effects of combined environmental exposures, water immersion, and axial load on the mechanical properties of CFFTs
  • Effects of accelerated seawater corrosion on CFFT cylinders under sustained axial load
  • Effects of accelerated seawater corrosion on HC-FCS columns under sustained axial load


xxii, 216 pages

Note about bibliography

Includes bibliographic references.


© 2018 Song Wang, All rights reserved.

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 11728

Electronic OCLC #