Rok 2024

• Deformation mitigation and twisting moment control in space frames

  Publikacja

  • A. Manguri
  • N. Saeed
  • R. Jankowski

  - Structures - Rok 2024

  Over the last five decades, space frames have centered on the modernization of touristic zones in view of architectural attractions. Although attempts to control joint movement and minimize axial force and bending moment in such structures were made sufficiently, twisting moments in space frames have been underestimated so far. In space frames, external load or restoring the misshapen shape may cause twisting in members. We herein...

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• Optimal shape and stress control of geometrically nonlinear structures with exact gradient with respect to the actuation inputs

  Publikacja

  • A. Manguri
  • D. Magisano
  • R. Jankowski

  - Structures - Rok 2024

  This paper presents an efficient and robust optimization methodology for stress and shape control of actuated geometrically nonlinear elastic structures, applied to 3D trusses. The actuation inputs, modeled as prescribed strains, serve as the optimization variables. The objective is to minimize total actuation while satisfying several constraints: (i) actuation bounds in each actuated element and (ii) target ranges for nodal displacements...

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• Prediction of the fatigue lifetime of PUR structural elements using a combined experimental-numerical approach

  Publikacja

  • G. Lesiuk
  • K. Junik
  • S. Duda
  • T. Socha
  • K. Kula
  • A. Denisiewicz
  • D. Medyński
  • W. Macek
  • J. A. Correia

  - Structures - Rok 2024

  This paper presents a method for estimating the fatigue life of polyurethane elastomeric components. A rubber replacement - polyurethane of hardness 80ShA commonly used in vibration damping systems, for example, in motor vehicle suspensions, was used for the study. A metal-rubber bushing component was selected for analysis, and numerical analysis was carried out along with a fatigue model proposal based on a modification of the...

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Rok 2023

• A novel hybrid adaptive framework for support vector machine-based reliability analysis: A comparative study

  Publikacja

  • S. Yang
  • Z. He
  • J. Chai
  • D. Meng
  • W. Macek
  • R. Branco
  • S. Zhu

  - Structures - Rok 2023

  This study presents an innovative hybrid Adaptive Support Vector Machine - Monte Carlo Simulation (ASVM-MCS) framework for reliability analysis in complex engineering structures. These structures often involve highly nonlinear implicit functions, making traditional gradient-based first or second order reliability algorithms and Monte Carlo Simulation (MCS) time-consuming. The application of surrogate models has proven effective...

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• Optimum number of actuators to minimize the cross-sectional area of prestressable cable and truss structures

  Publikacja

  • A. Manguri
  • N. Saeed
  • F. Kazemi
  • M. Szczepański
  • R. Jankowski

  - Structures - Rok 2023

  This paper describes a new computational method for determining the optimum number of actuators to design the optimal and economic cross-sectional area of pin-jointed assemblies based on the conventional force method. The most active members are selected to be prestressed to redistribute stress in the whole structure, resulting in regulating the internal force of bars that face high stress. Reducing stress in critical members allows...

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• Optimum shapes and dimensions of rubber bumpers in order to reduce structural pounding during seismic excitations

  Publikacja

  • S. M. Khatami
  • H. Naderpour
  • A. Mortezaei
  • M. Maddah
  • N. Lasowicz
  • R. Jankowski

  - Structures - Rok 2023

  Large displacement of structures observed during seismic excitations may lead to collisions between two adjacent, insufficiently-separated buildings and may result in major damages of both of them. In many building codes, appropriate equations or approximately recommended distances between structures in order to avoid pounding hazard have been introduced. Unfortunately, further, more detailed considerations show that safety situation...

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Rok 2022

• Shaking table experimental study on pounding between adjacent structures founded on different soil types

  Publikacja

  • M. Miari
  • R. Jankowski

  - Structures - Rok 2022

  The aim of this study is to extensively investigate the effect of the soil type on the response of colliding structures based on shaking table experimental tests. Two single-storey models of steel buildings with different dynamic parameters were considered in this study. Three pounding scenarios were taken into account by applying different seismic gaps (0.5 cm, 1 cm and 1.5 cm as well as the no pounding case). First, the effect...

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Rok 2021

• Direct measurements, numerical predictions and simple formula estimations of welding-induced biaxial residual stresses in a full-scale steel stiffened plate structure

  Publikacja

  • M. Yi
  • S. Noh
  • D. Lee
  • D. Seo
  • J. Paik
  • M. Yi

  - Structures - Rok 2021

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• Impact response of novel layered two stage fibrous composite slabs with different support type

  Publikacja

  • R. Rithanyaa
  • G. Murali
  • M. Salaimanimagudam
  • R. Fediuk
  • H. Abdelgader
  • A. Siva

  - Structures - Rok 2021

  The performance of novel Layered Two Stage Fibrous Composite slabs (LTSFC) was pioneered under falling mass collisions using a combined experimental and numerical study. Such LTSFC slabs consist of three layers with and without the insertion of glass fibre mesh between the layers. LTSFC techniques were used to fabricate the composite slabs with three layers including 3%, 1.5%, and 3% of fibre content for the top, middle, and...

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Rok 2020

• Impact performance of novel multi-layered prepacked aggregate fibrous composites under compression and bending

  Publikacja

  • G. Murali
  • S. R. Abid
  • Y. M. Amran
  • H. Abdelgader
  • R. Fediuk
  • A. Susrutha
  • K. Poonguzhali

  - Structures - Rok 2020

  Multi-layered Prepacked aggregate fibrous composite (MLPAFC) is a new type of concrete, which is prepared in two subsequent stages of aggregate-fibre skeleton prepacking and cementitious grouting. In this study, ten MLPAFC mixtures were prepared in three subsequent layers incorporating different contents of four different types of steel fibres. Long and short hooked-end and crimped steel fibers were adopted with 3.0 and 1.5% dosages...