Search results for: POLYMER DAMPERS

• Polymers

  Journals

  ISSN: 2073-4360

• Experimental study on effectiveness of polymer dampers in reduction of structural vibrations

  Publication

  • N. Lasowicz
  • A. Kwiecień
  • B. Zając
  • R. Jankowski

  - Year 2014

  Vibrations of civil engineering structures, generated by dynamic loads, may be very dangerous to the structures themselves as well as may have significant influence on human perception and comfort. A number of different methods have been proposed in order to minimize such situations. This concern newly designed structures as well as those which dynamic properties have to be modified due to problems with excessive vibrations. One...

• Experimental study on the effectiveness of polymer dampers in reduction of structural vibrations

  Publication

  • N. Lasowicz
  • A. Kwiecień
  • B. Zając
  • R. Jankowski

  - Year 2014

  Vibrations of civil engineering structures, generated by dynamic loads, may be very dangerous to the structures themselves as well as may have significant influence on human perception and comfort. A number of different methods have been proposed in order to minimize such situations. This concern newly designed structures as well as those which dynamic properties have to be modified due to problems with excessive vibrations. One...

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• Investigation of behaviour of metal structures with polymer dampers under dynamic loads

  Publication

  • N. Lasowicz
  • R. Jankowski

  - Procedia Engineering - Year 2017

  A large number of accidents concerning structures subjected to dynamic loads have been recently observed. One of the examples of such a structure is a temporary steel grandstand erected using scaffolding system. Dynamic load that is generated by crowd movement has a significant influence on the behaviour of the structure and may lead to excessive structural vibrations. The aim of the study is to consider the idea of using polymer...

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• POLYMER TESTING

  Journals

  ISSN: 0142-9418 , eISSN: 1873-2348

• Polimery

  Journals

  ISSN: 0032-2725

• POLYMER

  Journals

  ISSN: 0032-3861 , eISSN: 1873-2291

• The Effectiveness of Polymer Damper in Damage Reduction of Temporary Steel Grandstand

  Publication

  • N. Lasowicz
  • R. Jankowski

  - Key Engineering Materials - Year 2016

  A large number of accidents involving damage of temporary grandstands during different types of events were observed in the past. The aim of the paper is to analyse numerically the effectiveness of a polymer damper in damage reduction of a temporary steel scaffolding grandstand exposed to dynamic load due to jumping. The element has been installed as a diagonal one at the back part of the structure. The method has been compared...

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• POLYMERS & POLYMER COMPOSITES

  Journals

  ISSN: 0967-3911

• Experimental study on the effectiveness of polymer damper in damage reduction of temporary steel grandstand

  Publication

  • N. Lasowicz
  • A. Kwiecień
  • R. Jankowski

  - Journal of Physics : Conference Series - Year 2015

  A large number of accidents, involving collapses of temporary grandstands during different types of events, were observed in the past. If the synchronized movement of people is tuned with the natural frequency of the affected part of the structure, resonance might occur. It may lead to severe damages of grandstands, their collapse or panic among the spectators. The aim of the paper is to assess, through preliminary experimental...

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• CARBOHYDRATE POLYMERS

  Journals

  ISSN: 0144-8617 , eISSN: 1879-1344

• POLYMER DEGRADATION AND STABILITY

  Journals

  ISSN: 0141-3910 , eISSN: 1873-2321

• POLYMER BULLETIN

  Journals

  ISSN: 0170-0839 , eISSN: 1436-2449

• JOURNAL OF POLYMERS AND THE ENVIRONMENT

  Journals

  ISSN: 1566-2543 , eISSN: 1572-8900

• EUROPEAN POLYMER JOURNAL

  Journals

  ISSN: 0014-3057 , eISSN: 1873-1945

• JOURNAL OF APPLIED POLYMER SCIENCE

  Journals

  ISSN: 0021-8995 , eISSN: 1097-4628

• Water Footprint Assessment of Selected Polymers, Polymer Blends, Composites, and Biocomposites for Industrial Application

  Publication

  • J. Korol
  • A. Hejna
  • D. Burchart-Korol
  • B. Chmielnicki
  • K. Wypiór

  - Polymers - Year 2019

  This paper presents a water footprint assessment of polymers, polymer blends, composites, and biocomposites based on a standardized EUR-pallet case study. The water footprint analysis is based on life cycle assessment (LCA). The study investigates six variants of EUR-pallet production depending on the materials used. The system boundary included the production of each material and the injection molding to obtain a standardized...

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• POLYMER COMPOSITES

  Journals

  ISSN: 0272-8397 , eISSN: 1548-0569

• Effect of soil on the capacity of viscous dampers between adjacent buildings

  Publication

  • E. C. Kandemir
  • R. Jankowski

  - GRADEVINAR - Year 2023

  This study investigated the seismic pounding of two adjacent buildings considering soil–structure interaction (SSI). A comprehensive parametric study of buildings with different heights was performed to reveal the pounding-involved behaviour considering the soil effect. Wavelet transform has been conducted to gain insight into the differences in the frequency contents of the impact forces between fixed- and flexible-base adjacent...

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• Investigating an Optimal Computational Strategy to Retrofit Buildings with Implementing Viscous Dampers

  Publication

  • F. Kazemi
  • N. Asgarkhani
  • A. Manguri
  • R. Jankowski

  - Year 2022

  Civil engineering structures may seriously suffer from different damage states re-‎sult of earthquakes. Nowadays, retrofitting the existing buildings is a serious ‎need among designers. Two important factors of required performance level and ‎cost of retrofitting play a crucial role in the retrofitting approach. In this study, a ‎new optimal computational strategy to retrofit structures by implementing linear ‎Viscous Dampers (VDs)...

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• Going into the research of dampers configuration for bodies under double load conditions.

  Publication

  • K. Lipiński

  - Year 2005

  Jednym z etapów projektowania układów mechanicznych jest dobranie wartości sztywności i tłumienia elementów i dopasowanie ich do planowanego zachowania mechanizmu. Proces ten można uprościć, gdy uda się połączyć komputerowe modelowanie mechanizmów i optymalizację numeryczną. W pracy zajęto się doborem elementów tłumiących. Zaproponowano optymalne ustawienie oraz optymalne wartości współczynników dla układów stabilizujących położenie...

• Optimal segmented dampers configuration for a laminar body carrying variable payload

  Publication

  • K. Lipiński

  - Year 2006

  Publikacja prezentuje zagadnienia analizy doboru tłumienia i konfiguracji elementów tłumiących dla ciała płaskiego poddanego dwóm stanom obciążenia. W pracy zaakceptowano użycie elementów tłumiących o tłumieniu wiskotycznym i o współczynniku tłumienie zależnym od położenia tłoka tego elementu. Ponieważ różne aspekty komfortu prowadzą do przeciwnych wytycznych odnośnie wyboru własności tłumiących, rozwiązanie dobory parametrów tłumienia...

• JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

  Journals

  ISSN: 0887-624X , eISSN: 1099-0518

• Reduction of steel chimney vibrations with a pendlum damper.

  Publication

  • R. Jankowski
  • M. Kujawa
  • C. K. Szymczak

  - Year 2004

  Karman vortices observed around chimneys may induce dangerous structural vi-brations at certain wind velocities. The aim of this paper is to analyse theeffectiveness of pendulum damper in vibration reduction of a steel chimney. A two degree-of-freedom system is used to model the behaviour of the struc-ture equipped with a damper. The results of the study show that the use of pendulum with tuned frequency leads to significant...

• POLYMER-KOREA

  Journals

  ISSN: 0379-153X

• POLYMER INTERNATIONAL

  Journals

  ISSN: 0959-8103 , eISSN: 1097-0126

• Polymer Crystallization

  Journals

  eISSN: 2573-7619

• POLYMER JOURNAL

  Journals

  ISSN: 0032-3896 , eISSN: 1349-0540

• Polymer News

  Journals

  ISSN: 0032-3918

• Novel Cell Permeable Polymers of N-Substituted L-2,3-Diaminopropionic Acid (DAPEGs) and Cellular Consequences of Their Interactions with Nucleic Acids

  Publication

  • A. Romanowska
  • K. Węgrzyn
  • K. Bury
  • E. Sikorska
  • A. Gnatek
  • A. Piwkowska
  • I. Konieczny
  • A. Lesner
  • M. Wysocka

  - International Journal of Molecular Sciences - Year 2021

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• Structural pounding models with Hertz spring and nonlinear damper

  Publication

  • S. Mahmoud
  • X. Chen
  • R. Jankowski

  - Journal of Applied Sciences - Year 2008

  W artykule przedstawiono porównanie możliwości wykorzystania dwóch modeli zderzeń: nieliniowego modelu lepkosprężystego i modelu Hertz'a z dodatkowym tłumieniem. Efektywność każdego z modeli zbadano porównując wyniki analiz numerycznych z wynikami badań eksperymentalnych. Wyniki pracy pokazują, iż zastosowanie nieliniowego modelu lepkosprężystego prowadzi do mniejszych błędów w przebiegach czasowych siły zderzenia oraz do mniejszych...

• Highly antifouling polymer-nanoparticle-nanoparticle/polymer hybrid membranes

  Publication

  • V. Vatanpour
  • M. Jouyandeh
  • S. S. Mousavi Khadem
  • S. Paziresh
  • A. Dehghan
  • M. Ganjali
  • H. Moradi
  • S. Mirsadeghi
  • A. Badiei
  • M. T. Munir... and 7 others

  - SCIENCE OF THE TOTAL ENVIRONMENT - Year 2022

  We introduce highly antifouling Polymer-Nanoparticle-Nanoparticle/Polymer (PNNP) hybrid membranes as multi-functional materials for versatile purification of wastewater. Nitrogen-rich polyethylenimine (PEI)-functionalized halloysite nanotube (HNT-SiO2-PEI) nanoparticles were developed and embedded in polyvinyl chloride (PVC) membranes for protein and dye filtration. Bulk and surface characteristics of the resulting HNT-SiO2-PEI...

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• CHEMICAL PAPERS

  Journals

  ISSN: 0366-6352 , eISSN: 1336-9075

• Express Polymer Letters

  Journals

  ISSN: 1788-618X

• IRANIAN POLYMER JOURNAL

  Journals

  ISSN: 1026-1265 , eISSN: 1735-5265

• REACTIVE & FUNCTIONAL POLYMERS

  Journals

  ISSN: 1381-5148 , eISSN: 1873-166X

• Predicting the seismic collapse capacity of adjacent SMRFs retrofitted with fluid viscous dampers in pounding condition

  Publication

  • F. Kazemi
  • B. Mohebi
  • R. Jankowski

  - MECHANICAL SYSTEMS AND SIGNAL PROCESSING - Year 2021

  Severe damages of adjacent structures due to structural pounding during earthquakes have emphasized the need to use some seismic retrofit strategy ‎to enhance the structural performance. ‎The purpose of this paper is to study the influence of using linear and nonlinear Fluid Viscous Dampers (FVDs) on the seismic collapse capacities of adjacent structures prone to pounding and proposing modification factors to modify the ‎median...

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• Predicting the seismic collapse capacity of adjacent SMRFs retrofitted with fluid viscous dampers in pounding condition

  Publication

  • F. Kazemi
  • R. Jankowski
  • B. Mohebi

  - MECHANICAL SYSTEMS AND SIGNAL PROCESSING - Year 2021

  Severe damages of adjacent structures due to structural pounding during earthquakes have emphasized the need to use some seismic retrofit strategy to enhance the structural performance. The purpose of this paper is to study the influence of using linear and nonlinear Fluid Viscous Dampers (FVDs) on the seismic collapse capacities of adjacent structures prone to pounding and proposing modification factors to modify the median...

• Performance of Vector-valued Intensity Measures for Estimating Residual Drift of Steel MRFs with Viscous Dampers

  Publication

  • B. Mohebi
  • F. Kazemi
  • N. Asgarkhani
  • P. Ghasemnezhadsani
  • A. Mohebi

  - International Journal of Structural and Civil Engineering Research - Year 2022

  Viscous Dampers (VDs) are widely used as passive energy dissipation system for improving seismic performance levels especially in retrofitting of buildings. Residual Inter-story Drift Ratio (R-IDR) is another important factor that specifies the condition of building after earthquake. The values of R-IDR illustrates the possibility of retrofitting and repairing of a building. Therefore, this study aims to explore the vector-valued...

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• Advanced Scalar-valued Intensity Measures for Residual Drift Prediction of SMRFs with Fluid Viscous Dampers

  Publication

  • F. Kazemi
  • B. Mohebi
  • N. Asgarkhani
  • A. Yousefi

  - International Journal of Structural Integrity - Year 2023

  Maximum Residual Inter-story Drift Ratio (RIDRmax) plays an important role to specify the state of a structure after severe earthquake and the possibility of repairing the structure. Therefore, it is necessary to predict the RIDRmax of Steel Moment-Resisting Frames (SMRFs) with high reliability by employing powerful Intensity Measures (IMs). This study investigates the efficiency and sufficiency of scalar-valued IMs for predicting...

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• Polymer Modified Bitumen

  Publication

  • H. Janik
  • M. Sienkiewicz
  • K. Borzędowska-Labuda

  - Year 2018

  In this paper we present the benefits of using polymers as an asphalt modifiers, especially the low molecular weight reactive compounds, which are capable of forming an polymer network with bitumen "in situ" in the process of its modification.

• Rheology of polymer blends

  Publication

  • M. Włoch
  • J. Datta

  - Year 2020

  Polymer blends are physical mixtures of two or more homopolymers or copolymers. This type of materials have wide spectrum of technological applications, and their properties are influenced, e.g., by the properties of single components and morphology of final material. The rheology of polymer blends is connected with the processing of polymer blends and is influenced by thermodynamics, morphology, and their evolution during testing....

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• A comparative study of the performance of passive samplers

  Publication

  • B. Zabiegała
  • C. Sarbu
  • M. Urbanowicz
  • J. Namieśnik

  - JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION - Year 2011

  Podstawowym celem podjętych badań było porównanie pracy dozymetrów pasywnych wykorzystywanych na etapie izolacji i wzbogacania lotnych związków organicznych z powietrza atmosferycznego na terenie aglomeracji Trójmiejskiej. Jako próbniki do pobierania próbek analitów zastosowano komercyjne dozymetry pasywne typu dyfuzyjnego (Radiello i Orsa 5) oraz dozymetry typu permeacyjnego własnej konstrukcji wyposażone w półprzepuszczalną membranę...

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• Polymer Chemistry

  Journals

  ISSN: 1759-9954 , eISSN: 1759-9962

• Mitigating the seismic pounding of multi-story buildings in series using linear and nonlinear fluid viscous dampers

  Publication

  • H. Elwardany
  • R. Jankowski
  • A. Seleemah

  - Archives of Civil and Mechanical Engineering - Year 2021

  Seismic-induced pounding between adjacent buildings may have serious consequences, ranging from minor damage up to total collapse. Therefore, researchers try to mitigate the pounding problem using different methods, such as coupling the adjacent buildings with stiff beams, connecting them by using viscoelastic links, and installing damping devices in each building individually. In the current paper, the effect of using linear and...

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• Friction Tuned Mass Dampers in Seismic-Excited High-Rise Buildings with SSI Effects: A Reliability Assessment

  Publication

  • S. Etedali
  • M. Akbari
  • M. Seifi

  - Journal of Earthquake and Tsunami - Year 2023

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• Seismic Response of High-Rise Buildings Equipped with Base Isolation and Non-Traditional Tuned Mass Dampers

  Publication

  • H. Naderpour
  • N. Naji
  • D. Burkacki
  • R. Jankowski

  - Applied Sciences-Basel - Year 2019

  One of the methods in structural control is the application of combinational control systems in order to reduce the response of structures during earthquakes. The aim of the present paper is to verify the effectiveness of a hybrid control strategy, combining base isolation and non-traditional tuned mass dampers (TMDs) (i.e., TMDs with dashpots directly connected to the ground) in suppressing structural vibrations of high-rise buildings....

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• COLLOID AND POLYMER SCIENCE

  Journals

  ISSN: 0303-402X , eISSN: 1435-1536

• Journal of Polymer & Composites

  Journals

  ISSN: 2321-8525 , eISSN: 2321-2810

• POLYMER REACTION ENGINEERING

  Journals

  ISSN: 1054-3414