scholarly journals A macro-element model for multidirectional cyclic lateral loading of monopiles in clay

2019 ◽  
Vol 106 ◽  
pp. 314-326 ◽  
Author(s):  
Ana M. Page ◽  
Gustav Grimstad ◽  
Gudmund R. Eiksund ◽  
Hans Petter Jostad
Keyword(s):  
Element Model ◽  
Lateral Loading ◽  
Macro Element

scholarly journals Numerical Modelling of Reinforced Concrete Slender Walls Subjected to Coupled Axial Tension–Flexure

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Xiaowei Cheng ◽  
Haoyou Zhang
Keyword(s):  
Reinforced Concrete ◽  
Plastic Hinge ◽  
Element Model ◽  
Lateral Loading ◽  
Design Parameters ◽  
Seismic Behaviour ◽  
High Rise ◽  
Ultimate Deformation ◽  
Axial Tension ◽  
Plastic Hinge Length

AbstractUnder strong earthquakes, reinforced concrete (RC) walls in high-rise buildings, particularly in wall piers that form part of a coupled or core wall system, may experience coupled axial tension–flexure loading. In this study, a detailed finite element model was developed in VecTor2 to provide an effective tool for the further investigation of the seismic behaviour of RC walls subjected to axial tension and cyclic lateral loading. The model was verified using experimental data from recent RC wall tests under axial tension and cyclic lateral loading, and results showed that the model can accurately capture the overall response of RC walls. Additional analyses were conducted using the developed model to investigate the effect of key design parameters on the peak strength, ultimate deformation capacity and plastic hinge length of RC walls under axial tension and cyclic lateral loading. On the basis of the analysis results, useful information were provided when designing or assessing the seismic behaviour of RC slender walls under coupled axial tension–flexure loading.

Macro Element for Pile Head Cyclic Lateral Loading

2011 ◽  
pp. 129-145 ◽  
Author(s):  
Michael Pender ◽  
Liam Wotherspoon ◽  
Norazzlina M. Sa’don ◽  
Rolando Orense
Keyword(s):  
Lateral Loading ◽  
Pile Head ◽  
Macro Element

scholarly journals Macro-element modelling of suction-embedded plate anchors for floating offshore structures

2019 ◽  
Vol 92 ◽  
pp. 16009
Author(s):  
Anderson Peccin Da Silva ◽  
Andrea Diambra ◽  
Dimitris Karamitros
Keyword(s):  
Good Accuracy ◽  
Large Range ◽  
Element Model ◽  
Offshore Structures ◽  
Hardening Rule ◽  
Centrifuge Tests ◽  
Wide Range ◽  
Plastic Potential ◽  
Macro Element ◽  
Plate Anchors

This work presents a new macro-element model to predict the behaviour of Suction Embedded Plate Anchors (SEPLAs) for floating offshore structures during keying and loading stages. Differently from previously published models for anchors, this new model is characterised by (i) a non-associated plastic potential with the aim of improving the prediction of anchor trajectory for the whole displacement domain and for a large range of padeye offsets; and (ii) by a strain-hardening rule enabling to predict the force and displacement mobilisation from the early stages of the keying process. The model was calibrated against LDFE analyses and compared with a broad set of LDFE and centrifuge tests results. The model proves capable of reproducing anchor rotation and displacement with good accuracy for a wide range of padeye offsets and distinct studies from the literature.

THIN-WALLED STEEL TUBULAR COLUMNS WITH UNIFORM AND GRADED THICKNESS UNDER CYCLIC LOADING

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Qusay Al-Kaseasebh ◽  
Iraj H.P Mamaghani
Keyword(s):  
Local Buckling ◽  
Element Model ◽  
Lateral Loading ◽  
Steel Columns ◽  
Tubular Columns ◽  
Aesthetic Appearance ◽  
Significant Strength ◽  
Global Buckling ◽  
Thin Walled ◽  
Graded Thickness

Thin-walled steel tubular circular columns are widely used as cantilever bridge piers due to their geometric efficiency, aesthetic appearance, and high earthquake resistance. However, local buckling, global buckling, or interaction between both is usually the main reason of significant strength and ductility loss in these columns, which eventually leads to their collapse. This paper investigates the behavior of uniform circular (C) and graded-thickness circular (GC) thin-walled steel tubular columns under constant axial and cyclic lateral loading. The GC column with size and volume of material equivalent to the C column is introduced and analyzed under constant axial and cyclic lateral loading. The analysis carried out using a finite-element model (FEM), which considers both material and geometric nonlinearities. The accuracy of the employed FEM is validated based on the experimental results available in the literature. The results revealed that, significant improvements in strength, ductility, and post-buckling behavior of thin-walled steel columns obtained using the GC column.

A macro-element model for inelastic building analysis

2000 ◽  
Vol 29 (12) ◽  
pp. 1725-1757 ◽  
Author(s):  
Juan C. de la Llera ◽  
Jorge V�squez ◽  
Anil K. Chopra ◽  
Jos� L. Almaz�n
Keyword(s):  
Element Model ◽  
Macro Element

scholarly journals Empirical Models to Formulate the Nonlinear Response of Rocking Shallow Foundations

2021 ◽  
Author(s):  
Sara Hamidpour ◽  
Hamzeh Shakib ◽  
Roberto Paolucci ◽  
António Correia ◽  
Masoud Soltani
Keyword(s):  
Nonlinear Response ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Empirical Models ◽  
Shallow Foundations ◽  
Stiffness Degradation ◽  
Variable Parameters ◽  
Numerical Investigations ◽  
Macro Element ◽  
Rocking Foundations

Abstract This paper aims to introduce a simplified moment-rotation backbone model for exploring the nonlinear behavior of shallow foundations subjected to rocking. The model is developed based on parametric numerical investigations of rectangular footings on dense dry sand, taking advantage of a nonlinear macro-element model verified based on a set of experimental results. Empirical expressions are proposed for rocking stiffness degradation due to gravity loads and foundation rotation as a function of the factor of safety against vertical loads and aspect ratio of foundations. Similar to previous researches, the uplift reference rotation was introduced to explore a new closedform expression appropriate for normalizing the foundation response in a non-dimensional form. The proposed approach for stiffness degradation and nonlinear backbone model of rocking foundations aims to be simple, to minimize the dependence on the variable parameters, and to provide physically sound selections for engineering applications.

scholarly journals A non-associative macro-element model for vertical plate anchors in clay

2021 ◽  
Author(s):  
Anderson Peccin da Silva ◽  
Andrea Diambra ◽  
Dimitrios K. Karamitros ◽  
Shiao Huey Chow
Keyword(s):  
Peak Load ◽  
Element Model ◽  
Offshore Structures ◽  
Model Parameters ◽  
Hardening Rule ◽  
Pull Out ◽  
Proposed Model ◽  
Plastic Potential ◽  
Plastic Hardening ◽  
Macro Element

This work proposes a new plastic hardening, non-associative macro-element model to predict the behaviour of anchors in clay for floating offshore structures during keying and up to the peak load. Building on available models for anchors, a non-associated plastic potential is introduced to improve prediction of anchor trajectory and loss of embedment at peak conditions for a large range of padeye offsets and different pull-out directions. The proposed model also includes a displacement-hardening rule to simulate the force and displacement mobilisation at the early stages of the keying process. The model is challenged and validated against different sets of numerical and centrifuge data. This extensive validation process revealed that two of the four newly introduced model parameters assume a constant value for the range of simulated cases. This suggests that only two of the newly introduced parameters may need to be calibrated for the use of the proposed macro-element model in practice.

Sign in / Sign up

Export Citation Format

Share Document