A model of fracture in reinforced concrete arches based on lumped damage mechanics

被引：20
|
作者：
Amorim, David L. N. de F. [1 ]
Proenca, Sergio P. B. [1 ]
Florez-Lopez, Julio [1 ,2 ]
机构：
[1] Univ Sao Paulo, Dept Struct Engn, Engn Sch Sao Carlos, Sao Carlos, SP, Brazil
[2] Univ Los Andes, Dept Struct Engn, Merida 5101, Venezuela
来源：
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2013年 / 50卷 / 24期
基金：
巴西圣保罗研究基金会;
关键词：
Arch; Damage; Lumped damage models; Plastic hinges; Reinforced concrete; NONLINEAR-ANALYSIS; STIFFNESS MATRIX; BEAM ELEMENT;
D O I：
10.1016/j.ijsolstr.2013.08.012
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A simplified model of cracking and damage in RC circular elements is proposed. The model can be used for the structural assessment of arches and rings. The constitutive equations are based on lumped damage mechanics which is an adaptation of fracture and continuum damage mechanics to the theory of frames with plastic hinges. An arch element is assumed to be the assemblage of an elastic circular component and two inelastic hinges where the main inelastic effects, plastic yielding of the longitudinal reinforcement and concrete cracking, are concentrated. Deformations in the elastic part are assumed to be small but the model may include some geometrically nonlinear effects due to large displacements or rotations of the hinges. The numerical examples presented in the paper show that the model describes correctly the global behavior of two structures including the softening phase. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4070 / 4079
页数：10
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