Interaction diagrams for FRP strengthened RC rectangular columns with large aspect ratio

被引：11
|
作者：
Vuggumudi, Sreelatha [1 ]
Alagusundaramoorthy, P. [1 ]
机构：
[1] IIT Madras, Struct Engn Lab, Madras 600036, Tamil Nadu, India
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 171卷
关键词：
P-n-M-n interaction diagrams; Semi-empirical solutions; Finite element analysis; RC rectangular columns; FRP composites; Large aspect ratio; Shape modification; FIBER-REINFORCED POLYMER; WALL-LIKE COLUMNS; CONFINED CONCRETE; BEHAVIOR; DESIGN; MODEL;
D O I：
10.1016/j.conbuildmat.2018.03.131
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The load carrying capacity of reinforced concrete columns (RC) shall be enhanced by providing lateral confinement using fiber reinforced polymer (FRP). As per ACI 440.2R-08 [I], external strengthening using FRP composites is more effective for circular columns than rectangular columns having an aspect ratio greater than 2.0. The main objective is to develop column interaction diagrams for RC rectangular columns having an aspect ratio greater than 2.0 externally strengthened using FRP composites without any shape modification and subjected to combined axial load (P-n) and bending moment (M-n) due to lateral loading. Tests are conducted and semi-empirical equations developed for FRP strengthened RC rectangular columns with large aspect ratio. P-n-M-n interactions diagrams are developed using the semi empirical solutions and validated with 3D finite element analysis. The column interaction diagrams are developed by varying the unconfined compressive strength of concrete, yield strength of steel, percentage of steel reinforcement and thickness of FRP composite. These diagrams shall be used for the design of FRP strengthened RC rectangular columns with large aspect ratio. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：187 / 196
页数：10
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