Application of shrinkage prediction models to restraint crack formation in unbonded post-tensioned slabs

被引：0

作者：

Lara, Gabriela R. Martinez ^{[1
,2
]}

Shin, Myoungsu ^{[3
]}

Byun, Yong-Hoon ^{[4
]}

Zi, Goangseup ^{[5
]}

Kang, Thomas H-K. ^{[1
,2
]}

机构：

[1] Seoul Natl Univ, Dept Architecture & Architectural Engn, 1 Gwanak Ro, Seoul 08826, South Korea

[2] Seoul Natl Univ, Inst Engn Res, 1 Gwanak Ro, Seoul 08826, South Korea

[3] Ulsan Natl Inst Sci & Technol UNIST, Sch Urban & Environm Engn, 50 UNIST Gil, Ulsan 44919, South Korea

[4] Kyungpook Natl Univ, Sch Agr Civil & Bioind Engn, 80 Daehak Ro, Daegu 41566, South Korea

[5] Korea Univ, Sch Civil Environm & Architectural Engn, Seoul 02841, South Korea

来源：

COMPUTERS AND CONCRETE | 2024年 / 33卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

crack formation; post-tensioning concrete slabs; restraint crack; shrinkage prediction; DRYING SHRINKAGE; CREEP; DESIGN;

D O I：

10.12989/cac.2024.33.4.349

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This study aims to investigate the effect of restraint configuration on crack formation due to shrinkage-and-creep-induced volumetric change in unbonded post-tensioned slabs. The first part of this study focuses on the comparison of existing shrinkage and creep calculation models that are used to predict the volume-changing behavior of concrete. The second part of this study presents the finite element analysis of a series of architectural configuration prototypes subjected to shrinkage and creep, which comprise unbonded post-tensioned slabs with various restraint configurations. The shrinkage and creep effects were simulated in the analysis by imposing strains obtained from one selected calculation model. The results suggest that a slab up to 300 ft. (90 m) in length does not require a closure strip if it is unrestrained by perimeter walls, and that the most effective restraint crack mitigation strategy for a slab restrained by perimeter walls is a partial wall release.

引用

页码：349 / 359

页数：11