ACI investigates tension-stiffening behaviour of cracked RC panels

The American Concrete Institute (ACI) has published a paper on an investigation into the effect of limited tension-stiffening behaviour of cracked RC panels under pure shear stresses.

ACI says the principal tensile strength of cracked concrete is not well defined in existing models for predicting the shear response of reinforced concrete (RC) membrane elements. As a result, the shear strength of RC elements is generally overestimated due to the unrealistic decreasing slope of tensile stress as the crack accumulates

The paper, Effect of Limited Tension Stiffening on Behavior of Reinforced Concrete Panels in Shear, says the investigation was carried out by proposing an analytical model named as the tension-stiffening fixed-angle truss model (TFTM).

According to ACI: “The proposed model includes the limited tension-stiffening effect of post-cracking reinforced concrete and adopts the fixed-angle theory.”

In the analysis of TFTM, an iterative root-finding technique and a search method genetic algorithm are applied for solving the stress-strain relationship. The limited tension-stiffening effect on RC panels is examined with a series of tests.

“Predictions by the proposed model show very good agreement with experimental results, and the elapsed time for each calculation loop is reduced significantly,” ACI adds.

This paper was written by Xueying Wang and J. S. Kuang.

Source

 

(Visited 1 times, 1 visits today)

Get involved

Register

As a member of this site you will be able to receive aggregates news relating only to those categories that are most relevant to you, submit job listings for FREE, post questions in the Q&A, and more.

Register Now

Feature your company

The Feature Your Company listing is your custom-made (by us) profile page that allows you to add any of the following content: text, videos, links, images. The page will also be listed on the Featured Company landing page. Over 560 unique aggregates users visit the site per day! Complete the enquiry form now to contact us.

Contact us

Jobs

Are you looking for an aggregate related job? Click here to see our jobs listing supplied by industry experts United Employment.

See Jobs

Advertise

Reach thousands of budget holders and decision makers by promoting your company on the longest established aggregate website in the US & Canada. Or advertise in our emails which are sent to opted-in subscribers according to their chosen categories. All advertising will display correctly on tablets and mobiles as this site is responsive.