Flexural behavior of ungrouted post-tensioned concrete masonry beams with unbonded bars

被引：6

作者：

Garcia, John M. ^{[1
]}

Bonett, Ricardo L. ^{[1
]}

Schultz, Arturo E. ^{[2
]}

Carrillo, Julian ^{[3
]}

Ledezma, Christian ^{[4
]}

机构：

[1] Univ Medellin, Fac Engn, Dept Civil Engn, Medellin, Colombia

[2] Univ Minnesota, Dept Civil Engn, Minneapolis, MN USA

[3] Nueva Granada Mil Univ, UMNG, Dept Civil Engn, Bogota, Colombia

[4] Pontificia Univ Catolica Chile, Escuela Ingn, Struct & Geotech Engn Dept, Santiago, Chile

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 203卷

关键词：

Post-tensioning; Masonry; Beams; Ungrouted; Unbonded; Eccentric bar; Flexural behavior;

D O I：

10.1016/j.conbuildmat.2018.12.101

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Precast and post-tensioned systems increase the efficiency of masonry beams in terms of labor and time of construction. This study is aimed at evaluating the flexural behavior of ungrouted post-tensioned concrete masonry beams, with eccentric bars, and the effect of the main design parameters on their structural performance when subjected to monotonic and unidirectional cyclic loading until failure. All beams failed in flexure by crushing of the masonry in the compression region. Masonry strength was the design parameter that had the most significant effect on the load-deflection behavior of post tensioned masonry beams. The test results showed that the measured nonlinear load-deflection behavior and the correlation between bar stress increase and midspan deflection can be estimated using a multi linear relationship. Beams tested under monotonic and unidirectional cyclic loading exhibited comparable load-deflection envelope response. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：210 / 221

页数：12

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