scholarly journals Elastic modulus reduction method for stable bearing capacity analysis of dumbbell-shaped CFST arches

2021 ◽  
Vol 2044 (1) ◽  
pp. 012163
Author(s):  
YuFeng Zhao ◽  
WeiWei Xie ◽  
Lu Feng Yang
Keyword(s):  
Elastic Modulus ◽  
Bearing Capacity ◽  
Reduction Method ◽  
Capacity Analysis ◽  
Modulus Reduction

Limit Bearing Capacity Analysis of Structure System with Different Types of Element Using Elastic Modulus Reduction Method

2011 ◽  
Vol 189-193 ◽  
pp. 2335-2340
Author(s):  
Wei Zhang ◽  
Lu Feng Yang ◽  
Li Wen Liu
Keyword(s):  
Elastic Modulus ◽  
Bearing Capacity ◽  
Reduction Method ◽  
Capacity Analysis ◽  
Governing Parameter ◽  
Structure System ◽  
Different Types ◽  
Plastic Limit Analysis ◽  
Element Bearing ◽  
Modulus Reduction

Limit bearing capacity analysis of structure system with different types of element (SSDE) is difficult to elastic modulus adjustment procedures. In this paper, elastic modulus reduction method (EMRM) is introduced for evaluation of the limit bearing capacity of SSDE, using the element bearing ratio (EBR) as the governing parameter. As a dimensionless quantity, the EBR can be used to measure the bearing state of every element, and the scheme of reducing elastic modulus can be expressed using a uniform equation for different types of element. When the structure system destroys, all elements will tend to reach their own strength. The algorithm is then extended to the plastic limit analysis of SSDE. Numerical examples are employed to demonstrate the applicability, accuracy and efficiency of the method.

Elastic Modulus Reduction Method Based Limit Analysis of Steel Lined Reinforced Concrete Penstocks Containing Flaws

2013 ◽  
Vol 671-674 ◽  
pp. 879-883
Author(s):  
Shu Lin Liu ◽  
Chuan Xiong Fu ◽  
Wei Zhang
Keyword(s):  
Elastic Modulus ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Reduction Method ◽  
Internal Force ◽  
Ultimate Bearing Capacity ◽  
Curve Beam ◽  
Beam Model ◽  
Force Calculation ◽  
Modulus Reduction

In the context of ultimate bearing capacity of steel lined reinforced concrete penstock (SLRCP) containing flaws, the use of the elastic modulus reduction method (EMRM) in conjunction with curve beam based internal force calculation is presented. The corrosion models for steel bar and lining are introduced from the literature. The SLRCP is considered bearing load together with lining and reinforced concrete, and its internal force is determined based on a simplified curve beam model. The element bearing ratio of SLRCP is given through the internal force and sectional strength, and is employed by the EMRM. The change of ultimate bearing capacity of some typical SLRCP within their operating life is then evaluated.

Limit Analyisis of Frame Structure Based on the Elastic Modulus Reduction Method

2014 ◽  
Vol 578-579 ◽  
pp. 950-953
Author(s):  
Qiu Hua Duan ◽  
Yan Qing Guo ◽  
Dan Dan Zeng ◽  
Yue Jing Luo
Keyword(s):  
Elastic Modulus ◽  
Reduction Method ◽  
Yield Criterion ◽  
Bending Moment ◽  
Limit Load ◽  
Frame Structure ◽  
Structure Damage ◽  
Linear Elastic ◽  
Element Bearing ◽  
Modulus Reduction

An efficient linear elastic iterative finite element method, namely, the elastic modulus reduction method is introduced to calculate limit load of frame structure. The elastic modulus reduction method defines the element bearing ratio on the basis of the generalized yield criterion and the strain energy equilibrium principle. Because the bending moment is the main factor inducing the frame structure damage, the element bearing ratio only considering the bending moment yield is proposed. Numerical examples demonstrate the applicability and precision of the elastic modulus reduction method for limit analysis of frame structures.

Study on the Strategy of Elastic Modulus Adjustment of the Elastic Modulus Reduction Method for Limit Analysis of Structures Containing Flaws

2010 ◽  
Vol 163-167 ◽  
pp. 655-663
Author(s):  
Wei Zhang ◽  
Li Wen Liu ◽  
Lu Feng Yang
Keyword(s):  
Elastic Modulus ◽  
Limit Analysis ◽  
High Efficiency ◽  
Reduction Method ◽  
Reference Element ◽  
Reference Stress ◽  
Integral Element ◽  
Element Bearing ◽  
Limit Analysis Method ◽  
Modulus Reduction

As a limit analysis method lately presented, the elastic modulus reduction method (EMRM) has the advantages of simplicity and high efficiency. In this paper, the strategy of elastic modulus adjustment of the EMRM is studied in order to extend the method applicable to the limit analysis of structures containing flaws (SCF). Two new algorithms of the reference element bearing ratio, reference element bearing ratio based on reference stress (REBS) and reference element bearing ratio based on integral element bearing ratio gradient (REBG), are proposed. Numerical examples show that the problems of instability and non-convergence in iterative process of limit analysis of SCF are improved, when the REBS or REBG is used in the strategy of elastic modulus adjustment of the EMRM.

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