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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 23 Abstracts search results
Document:
SP-351_01
Date:
April 1, 2022
Author(s):
J.W. Wright and C.P. Pantelides
Publication:
Symposium Papers
Volume:
351
Abstract:
Axial compression performance of concrete columns reinforced with GFRP bars and spiral, 2304 duplex stainless bars and spiral, and 316L stainless clad bars, in varying combinations is examined after exposure to accelerated corrosion. The hybrid columns were reinforced with a combination of metallic and GFRP reinforcement. After corrosion exposure the columns were tested under axial compression to failure. Columns with GFRP vertical bars and stainless steel spiral were less corrosion resistant and had smaller axial load capacity than hybrid columns with stainless clad or stainless steel vertical bars and GFRP spiral. Columns reinforced with stainless steel spiral achieving two to three times the maximum axial displacement of columns with GFRP spiral. Axial compression capacity of hybrid columns in both corroded and uncorroded conditions was modeled using concrete confinement models for metallic and GFRP reinforcement with good agreement.
DOI:
10.14359/51734671
CI4304Awards
April 1, 2021
Concrete International
43
Issue:
4
For their outstanding achievements and service to the Institute, ACI recognized select members at the ACI Virtual Concrete Convention – Spring 2021.
CI4304Ghosh
S.K. Ghosh and Andrew W. Taylor
Only three sections in Chapter 18—Earthquake-Resistant Structures of ACI 318-19 remain unchanged in comparison to ACI 318-14. This is the second of two articles that outline these changes and is focused on special structural walls, diaphragms and trusses, foundations, and members not designated as part of the seismic force-resisting system.
CI4304Roller
John J. Roller
Concrete cracking presents a significant obstacle to achieving a liquid-tight environmental engineering concrete structure. The minimum shrinkage and temperature (S&T) reinforcement requirements cited in ACI 350-20 should prove to be beneficial with respect to limiting crack widths and reducing the likelihood of leakage. However, in some instances, simply increasing the amount of S&T reinforcement alone may not be enough.
SP328-05
September 12, 2018
Salah R. Sarhat and Edward G. Sherwood
328
The research described in this paper studies the effect of the effective depth, d, on the shear behavior of large reinforced masonry beams. Five fully grouted shear critical reinforced masonry beams ranging in effective depth from 300 mm to 1400 mm were tested to failure under three point loading to investigate their cracking behavior and ultimate shear strengths. The experimental shear strengths were compared with the failure shear stresses predicted using three different design codes: the TMS 402 code, the CSA S304.1-2004 code and the CSA A23.3-14 code for reinforced concrete. The test results show that the size effect in reinforced masonry is real and very significant, in that failure shear stresses decreased as the effective depth increased. It is shown that as the effective depth increases, the longitudinal crack width and spacing at mid-depth increase as well. These wider cracks initiate shear failure at a lower shear stress due to reduced aggregate interlock capacity. It is shown that the TMS masonry design code gives non-conservative predictions of the shear strength of large masonry beams. The most accurate prediction of the size effect in masonry is given by the CSA A23.3 -2014 code which is based on the General Method of shear design used extensively to design reinforced concrete. The paper highlights the necessity to revise masonry design codes to address the size effect.
10.14359/51711149
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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.