Tension Development Length of Large-Diameter Bars for Severe Cyclic Loading

被引：0

作者：

Murcia-Delso, Juan ^{[1
]}

Stavridis, Andreas ^{[2
]}

Shing, P. Benson ^{[3
]}

机构：

[1] Tecnalia, Donostia San Sebastian, Gipuzkoa, Spain

[2] SUNY Buffalo, Dept Civil Struct & Environm Engn, Buffalo, NY 14260 USA

[3] UCSD, Struct Engn, La Jolla, CA USA

来源：

ACI STRUCTURAL JOURNAL | 2015年 / 112卷 / 06期

关键词：

bond slip; cyclic loading; development length; finite element analysis; large-diameter bars; pull-push tests; reinforced concrete; reinforcing bars; reliability; BOND STRENGTH;

D O I：

10.14359/51687937

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents a study on the tension development length of large-diameter reinforcing bars embedded in well-confined concrete. Pull-push tests were conducted on No. 14 and 18 (43 and 57 mm) bars to evaluate whether the development length requirements in the AASHTO LRFD Specifications are adequate for large-diameter bars subjected to severe cyclic loading. The data have been used to validate finite element models, which have been subsequently employed in a parametric study to establish a formula to determine the tensile capacity of a bar as a function of the embedment length, and the concrete and steel strengths. Monte Carlo simulations conducted with this formula have shown that the AASHTO requirements are adequate to develop the yield strength of a bar in tension, but they do not have the desired reliability to develop its ultimate tensile strength when uncertainties are considered. Hence, an improved development length requirement is proposed.

引用

页码：689 / 700

页数：12