Time-dependent behaviour of simply-supported steel-concrete composite beams

1991 ◽  
Vol 43 (157) ◽  
pp. 265-274 ◽  
Author(s):  
M. A. Bradford ◽  
R. I. Gilbert
Keyword(s):  
Composite Beams ◽  
Time Dependent ◽  
Simply Supported ◽  
Time Dependent Behaviour ◽  
Dependent Behaviour

Time-dependent behaviour of composite beams with blind bolts under sustained loads

2015 ◽  
Vol 112 ◽  
pp. 196-207 ◽  
Author(s):  
Huiyong Ban ◽  
Brian Uy ◽  
Sameera Wijesiri Pathirana ◽  
Ian Henderson ◽  
Olivia Mirza ◽  
...  
Keyword(s):  
Composite Beams ◽  
Time Dependent ◽  
Sustained Loads ◽  
Time Dependent Behaviour ◽  
Dependent Behaviour

State-of-the-art review on the time-dependent behaviour of composite steel-concrete beams

2021 ◽  
pp. 61-82
Author(s):  
Gianluca Ranzi ◽  
Graziano Leoni ◽  
Raymond Ian Gilbert ◽  
Luigino Dezi ◽  
Riccardo Zandonini
Keyword(s):  
Concrete Beams ◽  
Structural Response ◽  
Composite Beams ◽  
Time Dependent ◽  
Time Effects ◽  
Shear Connection ◽  
Time Dependent Behaviour ◽  
Dependent Behaviour ◽  
Composite Steel

<p>This chapter provides an overview of the work carried out to date on the long-term behaviour of composite steel-concrete beams. In the first part of the chapter, a description of the components forming a composite member is presented. This is followed by an outline of the main kinematic concepts, such as full and partial shear interaction, that influence the structural response of this form of construction due to the flexibility of the shear connection provided between the concrete and steel components. The review of the work performed on the time-dependent behaviour of concrete and its influence on the long-term structural response of composite beams for building and bridge applications is then presented. The modelling and experimental work considered in the review highlights the importance of considering concrete time effects, when predicting the in-service response of composite beams.</p>

Application of shotcrete constitutive model to the time dependent behavior of TBM tunnel lining

2018 ◽  
Vol 7 (3) ◽  
pp. 1826
Author(s):  
Heyam H. Shaalan ◽  
Mohd Ashraf Mohamad Ismail ◽  
Romziah Azit
Keyword(s):  
Constitutive Model ◽  
Steel Fibre ◽  
Tunnel Lining ◽  
Time Dependent ◽  
Elastic Behaviour ◽  
Elastic Analysis ◽  
Time Dependent Behaviour ◽  
Shotcrete Lining ◽  
Creep And Shrinkage ◽  
Dependent Behaviour

Shotcrete is ordinary concrete applied to the surface under high pressure. It demonstrates a highly time-dependent behaviour after few hours of application. Traditional approaches assume a simple linear elastic behaviour using a hypothetical young modulus to investigate the time-dependency and creep effects. In this paper, a new constitutive model of shotcrete is applied to evaluate the time-dependent behaviour of a TBM tunnel lining and investigate the parameters that can influence this behaviour. The Shotcrete model is based on the framework of Elasto-plasticity and designed to model shotcrete linings more realistically. The basic data of Pahang-Selangor Raw Water Transfer Project is used for the analysis study. An attempt is made to investigate the influence of some input parameters of the shotcrete model on the time-dependent behaviour of the shotcrete lining. These parameters include the time-dependent stiffness/strength parameters, creep and shrinkage parameters and steel fibre parameters. The variation in shotcrete strength classes causes a noticeable influence on the development of shotcrete compressive strength with time, particularly during the first days of application. The creep and shrinkage strain cause a considerable reduction in the development of the shotcrete stress with time. The impact of steel fibre content is determined, and the result indicated that the development of plain shotcrete stresses with time is lower than that of the reinforced shotcrete. In addition, a comparison study is performed to analyse the tunnel lining behaviour using both shotcrete model and an elastic analysis. Significant differences in shotcrete lining stresses are achieved when using the elastic analysis while the shotcrete model results in a reasonable result that can be used for the design requirements. 

scholarly journals Application of micro-computer tomography and inverse finite element analysis for characterizing the visco-hyperelastic response of bulk liver tissue using indentation

2021 ◽  
Vol 3 (5) ◽  
Author(s):  
Rajeswara R. Resapu ◽  
Roger D. Bradshaw
Keyword(s):  
Finite Element ◽  
Liver Tissue ◽  
Loading Rate ◽  
Time Dependent ◽  
Nonlinear Material ◽  
Computational Time ◽  
List Type ◽  
Prony Series ◽  
Time Dependent Behaviour ◽  
Dependent Behaviour

Abstract In-vitro mechanical indentation experimentation is performed on bulk liver tissue of lamb to characterize its nonlinear material behaviour. The material response is characterized by a visco-hyperelastic material model by the use of 2-dimensional inverse finite element (FE) analysis. The time-dependent behaviour is characterized by the viscoelastic model represented by a 4-parameter Prony series, whereas the large deformations are modelled using the hyperelastic Neo-Hookean model. The shear response described by the initial and final shear moduli and the corresponding Prony series parameters are optimized using ANSYS with the Root Mean Square (RMS) error being the objective function. Optimized material properties are validated using experimental results obtained under different loading histories. To study the efficacy of a 2D model, a three dimensional (3D) model of the specimen is developed using Micro-CT of the specimen. The initial elastic modulus of the lamb liver obtained was found to 13.5 kPa for 5% indentation depth at a loading rate of 1 mm/sec for 1-cycle. These properties are able to predict the response at 8.33% depth and a loading rate of 5 mm/sec at multiple cycles with reasonable accuracy. Article highlights The visco-hyperelastic model accurately models the large displacement as well as the time-dependent behaviour of the bulk liver tissue. Mapped meshing of the 3D FE model saves computational time and captures localized displacement in an accurate manner. The 2D axisymmetric model while predicting the force response of the bulk tissue, cannot predict the localized deformations.

Displacement-based simulation of time-dependent behaviour of RC beams with prestressed FRP or steel tendons

2015 ◽  
Vol 16 (3) ◽  
pp. 406-417 ◽  
Author(s):  
Daniel Knight ◽  
Phillip Visintin ◽  
Deric J. Oehlers
Keyword(s):  
Time Dependent ◽  
Rc Beams ◽  
Time Dependent Behaviour ◽  
Displacement Based ◽  
Dependent Behaviour
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