Compressive response of substandard steel-jacketed RC columns strengthened under sustained service loads: From the local to the global behavior

被引：25
作者：
Ferrotto, M. F. [1 ]
Cavaleri, L. [1 ]
Papia, M. [1 ]
机构：
[1] Univ Palermo, Dept Civil Environm Aerosp Mat Engn, Palermo, Italy
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 179卷
关键词：
Preloading; Confinement; Confined concrete; Steel jacketing; Confinement lateral pressure; Sustained loads; STRESS-STRAIN MODEL; REINFORCED-CONCRETE COLUMNS; RECYCLED AGGREGATE CONCRETE; CONFINED CONCRETE; PRELOAD; ANGLES; STRIPS; REPAIR;
D O I：
10.1016/j.conbuildmat.2018.05.247
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper presents an experimental investigation on substandard partially steel jacketed RC columns strengthened under sustained loads and loaded until failure. The aim of the study is to compare the compressive response of preloaded columns with respect to the tests without preload to obtain a more realistic prediction of load-carrying capacity of structural columns after retrofitting under serviceability loads. The influence of the preload level, the delayed contribution of the confining device during the loading process and the time dependent effects are highlighted for the tested specimens. Based on the experimental observations, an analysis-oriented model is proposed for the reproduction of the compressive response of steel jacketed columns taking into account the effects of the preload. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：500 / 511
页数：12
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