ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Fatigue Behavior of Partially Composite-Insulated Concrete Sandwich Walls

Author(s): Nathan Teixeira and Amir Fam

Publication: Structural Journal

Volume: 114

Issue: 1

Appears on pages(s): 125-136

Keywords: axial load; basalt fiber-reinforced polymer; composite action; cyclic; fatigue; insulated; sandwich wall; shear connector

DOI: 10.14359/51689153

Date: 1/1/2017

Abstract:
Seven fatigue tests were performed on four precast insulated sandwich panels with either steel or basalt fiber-reinforced polymer (BFRP) flexural reinforcement and shear connectors. Cyclic bending was conducted at two loading amplitudes: high (Pdef) and low (Pstr), representing serviceability limits for deflection and stress, respectively; both were considerably higher than the maximum national wind load. The effect of a moderate axial load, as in load-bearing walls, was examined. The panels initially had a degree of composite action (DCA) of 76 to 84%. The axially loaded steel-reinforced panel achieved 1 million cycles under Pstr, then another 1 million under Pdef. Its DCA reduced to 73, then 65%. Without axial load, 1 and 0.24 million cycles were achieved under Pstr and Pdef, and DCA reduced to 69% and 22%, respectively. The BFRP panel failed at 0.07 million cycles at Pstr. Its DCA reduced from 76 to 69%. It was then axially loaded and retested successfully to 1 million cycles. Stiffness degradations of 12 to 50%—consistent with DCA reductions—were observed.