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Article
Publication date: 1 June 1998

C.P. Providakis and G. Toungelidis

A boundary element method for solving problems dealing with the dynamic analysis of thin elastoplastic flexural plates of arbitrary geometry and conditions inside the domain is…

247

Abstract

A boundary element method for solving problems dealing with the dynamic analysis of thin elastoplastic flexural plates of arbitrary geometry and conditions inside the domain is proposed here. All possible edge boundary conditions, with any interior support conditions, such as isolated points (columns), lines (walls) or regions (patches) can be treated. The formulation by using the static fundamental solution of the problem leads to a system of boundary integral equations involving values of the layers along the edge. The solution of the problem with interior support conditions is achieved by an elimination of the unknown boundary layers. Subsequently, a descritization leads to a system of simultaneous algebraic equations which is solved numerically. A step‐by‐step time integration algorithm is employed to evaluate the dynamic inelastic response of the plate. Several examples are presented to illustrate the efficiency of the method.

Details

Engineering Computations, vol. 15 no. 4
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 1 September 2002

C.P. Providakis and S.G. Kourtakis

The feasibility of advanced viscoplastic models for non‐linear boundary element analysis of metallic structural components with dependence on thermomechanical history is…

335

Abstract

The feasibility of advanced viscoplastic models for non‐linear boundary element analysis of metallic structural components with dependence on thermomechanical history is investigated. Several numerical examples are presented using the boundary element implementation of two different internal state variable viscoplastic models to the solution of time‐dependent inelastic problems arising in creeping metallic structural components under the combined action of high temperature loading gradients and quasi‐static mechanical loading conditions. To demonstrate the efficiency of the implemented viscoplastic models, the results obtained using the direct boundary element methodology are compared with those obtained by both analytical and finite element solution as well as, for different numerical results of plane strain thermoviscoplastic deformation problems under general thermomechanical loading.

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Engineering Computations, vol. 19 no. 6
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 21 September 2020

Shishir Gupta, Soumik Das and Rachaita Dutta

The purpose of this paper is to investigate the mathematical model comprising a heterogeneous fluid-saturated fissured porous layer overlying a non-homogeneous anisotropic…

131

Abstract

Purpose

The purpose of this paper is to investigate the mathematical model comprising a heterogeneous fluid-saturated fissured porous layer overlying a non-homogeneous anisotropic fluid-saturated porous half-space without fissures. The influence of point source on horizontally polarized shear-wave (SH-wave) propagation has been studied intensely.

Design/methodology/approach

Techniques of Green’s function and Fourier transform are applied to acquire displacement components, and with the help of boundary conditions, complex frequency equation has been constructed.

Findings

Complex frequency relation leads to two distinct equations featuring dispersion and attenuation properties of SH-wave in a heterogeneous fissured porous medium. Using MATHEMATICA software, dispersion and damping curves are sketched to disclose the effects of heterogeneity parameters associated with both media, parameters related to rigidity and density of single porous half-space, attenuation coefficient, wave velocity, total porosity, volume fraction of fissures and anisotropy. The fact of obtaining classical Love wave equation by introducing several particular conditions establishes the validation of the considered model.

Originality/value

To the best of the authors’ knowledge, effect of point source on SH-wave propagating in porous layer containing macro as well as micro porosity is not analysed so far, although theory of fissured poroelasticity itself has vast applications in real life and impact of point source not only enhances the importance of fissured porous materials but also opens a new area for future research.

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Engineering Computations, vol. 38 no. 4
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 7 September 2021

Shishir Gupta, Soumik Das and Rachaita Dutta

The purpose of the present study is to investigate the dispersion and damping behaviors of Love-type waves propagating in an irregular fluid-saturated fissured porous stratum…

101

Abstract

Purpose

The purpose of the present study is to investigate the dispersion and damping behaviors of Love-type waves propagating in an irregular fluid-saturated fissured porous stratum coated by a sandy layer.

Design/methodology/approach

Two cases are analyzed in this study. In case-I, the irregular fissured porous stratum is covered by a dry sandy layer, whereas in case-II, the sandy layer is considered to be viscous in nature. The method of separation of variables is incorporated in this study to acquire the displacement components of the considered media.

Findings

With the help of the suitable boundary conditions, the complex frequency relation is established in each case leading to two distinct equations. The real and imaginary parts of the complex frequency relation define the dispersion and attenuation properties of Love-type waves, respectively. Using the MATHEMATICA software, several graphical implementations are executed to illustrate the influence of the sandiness parameter, total porosity, volume fraction of fissures, fluctuation parameter, flatness parameters and ratio of widths of layers on the phase velocity and attenuation coefficient. Furthermore, comparison between the two cases is clearly framed through the variation of aforementioned parameters. Some particular cases in the presence and absence of irregular interfaces are also analyzed.

Originality/value

To the best of the authors' knowledge, although many articles regarding the surface wave propagation in different crustal layers have been published, the propagation of Love-type waves in a sandwiched fissured porous stratum with irregular boundaries is still undiscovered. Results accomplished in this analytical study can be employed in different practical areas, such as earthquake engineering, material science, carbon sequestration and seismology.

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Multidiscipline Modeling in Materials and Structures, vol. 17 no. 6
Type: Research Article
ISSN: 1573-6105

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Article
Publication date: 1 October 2010

H. Taheri and A. Beitollahi

The purpose of this paper is to develop a proper tool for structural analysis and designing in near‐fault regions where the level of earthquake hazard is more and its nature is…

278

Abstract

Purpose

The purpose of this paper is to develop a proper tool for structural analysis and designing in near‐fault regions where the level of earthquake hazard is more and its nature is different from far‐field regions.

Design/methodology/approach

The paper uses near‐fault records and pulse extraction using wavelet analysis and designs a spectra concept.

Findings

The paper developed a proper design spectra for near‐fault structural analysis and design.

Originality/value

This paper using pulse extraction for developing a 3D response spectrum with paying attention to earthquake magnitude is new and final design spectra proposed is valuable.

Details

International Journal of Disaster Resilience in the Built Environment, vol. 1 no. 3
Type: Research Article
ISSN: 1759-5908

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Article
Publication date: 20 April 2012

Naill M. Momani

There are several researches which addressed earthquake probabilistic and deterministic risk assessment without linking the decision‐making process in order to implement policies…

838

Abstract

Purpose

There are several researches which addressed earthquake probabilistic and deterministic risk assessment without linking the decision‐making process in order to implement policies, plans, and procedures to prevent or reduce human and monetary losses. This paper aims to address this issue.

Design/methodology/approach

This study suggests an integrated framework for earthquake consequences management. The framework consists of earthquake consequences model, value analysis, and socio‐economic analysis, as well as dynamic integration for implementing strategies, policies, and plans.

Findings

The developed integrated framework for earthquakes consequences management could be used for a study area especially in developing countries in which human and capital resources are limited.

Research limitations/implications

There is a need to have different case studies to demonstrate how the integrated framework for earthquake consequence management could reduce human and monetary losses due to earthquakes for a study area.

Originality/value

It is important to consider earthquake risks as part of strategic planning for societies that are vulnerable to future earthquakes.

Details

Disaster Prevention and Management: An International Journal, vol. 21 no. 2
Type: Research Article
ISSN: 0965-3562

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Article
Publication date: 21 June 2011

Naill M. Momani

The aim of this paper is to link earthquake probabilistic and deterministic risk assessment with the decision‐making process in order to implement policies, plans, and procedures…

1129

Abstract

Purpose

The aim of this paper is to link earthquake probabilistic and deterministic risk assessment with the decision‐making process in order to implement policies, plans, and procedures to prevent or reduce human and monetary losses.

Design/methodology/approach

This study suggests an integrated framework for earthquake consequences management. The framework consists of an earthquake consequences model, value analysis, and socio‐economic analysis, as well as dynamic integration for implementing strategies, policies, and plans.

Findings

The developed integrated framework for earthquake consequences management could be used for a study area, especially in developing countries in which human and capital resources are limited.

Research limitations/implications

There is a need to have different case studies to demonstrate how the integrated framework for earthquake consequence management could reduce human and monetary losses due to earthquakes for a study area.

Originality/value

It is important to consider earthquake risks as part of strategic planning for societies that are vulnerable to future earthquakes.

Details

Disaster Prevention and Management: An International Journal, vol. 20 no. 3
Type: Research Article
ISSN: 0965-3562

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Article
Publication date: 21 November 2024

Shaohua Jiang, Jingqi Zhang, Jingting Shi and Yunze Wu

This paper introduces a novel method to improve building safety management by leveraging building information modeling (BIM) and adaptive information retrieval techniques. The…

56

Abstract

Purpose

This paper introduces a novel method to improve building safety management by leveraging building information modeling (BIM) and adaptive information retrieval techniques. The integration aims to overcome the limitations of traditional safety management methods in connecting construction processes with risk management efficiently.

Design/methodology/approach

The proposed method involves developing industry foundation classes (IFC) ontologies and integrating them with a safety document ontology to form a comprehensive BIM-based safety context framework. Custom reasoning rules and an inference engine are constructed to enable automatic context-aware safety information retrieval. The methodology is demonstrated through an adaptive information retrieval system using job hazard analysis (JHA) documents.

Findings

The implementation of the BIM-based adaptive information retrieval system shows significant improvements in identifying and managing construction risks. By mapping job-specific risks to corresponding safety measures, the system enhances risk detection and management tailored to particular construction tasks. The results indicate a marked improvement in the precision and accuracy of safety assessments and recommendations, aligning them closely with planned construction activities and conditions.

Originality/value

This paper offers an innovative approach to construction safety management through the development of a BIM-facilitated context-aware information retrieval system. This approach provides a more intelligent and automated framework for identifying and managing risks in construction projects. By focusing on specific job steps and related risks, the system enhances the effectiveness and accuracy of safety measures, contributing to better overall building safety management.

Details

Engineering, Construction and Architectural Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0969-9988

Keywords

Available. Content available
Article
Publication date: 12 September 2022

Hossein Omrany, Amirhosein Ghaffarianhoseini, Ali Ghaffarianhoseini and Derek John Clements-Croome

This paper critically analysed 195 articles with the objectives of providing a clear understanding of the current City Information Modelling (CIM) implementations, identifying the…

1259

Abstract

Purpose

This paper critically analysed 195 articles with the objectives of providing a clear understanding of the current City Information Modelling (CIM) implementations, identifying the main challenges hampering the uptake of CIM and providing recommendations for the future development of CIM.

Design/methodology/approach

This paper adopts the PRISMA method in order to perform the systematic literature review.

Findings

The results identified nine domains of CIM implementation including (1) natural disaster management, (2) urban building energy modelling, (3) urban facility management, (4) urban infrastructure management, (5) land administration systems, (6) improvement of urban microclimates, (7) development of digital twin and smart cities, (8) improvement of social engagement and (9) urban landscaping design. Further, eight challenges were identified that hinder the widespread employment of CIM including (1) reluctance towards CIM application, (2) data quality, (3) computing resources and storage inefficiency, (4) data integration between BIM and GIS and interoperability, (5) establishing a standardised workflow for CIM implementation, (6) synergy between all parties involved, (7) cybersecurity and intellectual property and (8) data management.

Originality/value

This is the first paper of its kind that provides a holistic understanding of the current implementation of CIM. The outcomes will benefit multiple target groups. First, urban planners and designers will be supplied with a status-quo understanding of CIM implementations. Second, this research introduces possibilities of CIM deployment for the governance of cities; hence the outcomes can be useful for policymakers. Lastly, the scientific community can use the findings of this study as a reference point to gain a comprehensive understanding of the field and contribute to the future development of CIM.

Details

Smart and Sustainable Built Environment, vol. 12 no. 5
Type: Research Article
ISSN: 2046-6099

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Article
Publication date: 24 October 2021

Quan Zhai, Jicheng Zhang, Guofeng Du, Yulong Rao and Xiaoyu Liu

At present, piezoelectric impedance technology has been used in the study of wood damage monitoring. However, little effort has been made in the research on the application of…

131

Abstract

Purpose

At present, piezoelectric impedance technology has been used in the study of wood damage monitoring. However, little effort has been made in the research on the application of piezoelectric impedance system to monitor the change of wood moisture content (MC). The monitoring method of wood MC is used by piezoelectric impedance technique in this study.

Design/methodology/approach

One piezoceramic transducer is bonded to the surface of wood specimens. The MC of the wood specimens increases gradually from 0% to 60% with 10% increments; the mechanical impedance of the wood specimen will change, and the change in the mechanical impedance of the structure is reflected by monitoring the change in the electrical impedance of lead zirconate titanate. Therefore, this paper investigates the relationship between wood MC change and piezoelectric impedance change to verify the feasibility of the piezoelectric impedance method for monitoring wood MC change.

Findings

The experiment verified that the real part of impedance of the wood increased with the increase of wood MC. Besides, the damage index root mean square deviation is introduced to quantify the damage degree of wood under different MC. At the same time, the feasibility and validity of this experiment were verified from the side by finite element simulation. Finally, MC monitoring by piezoelectric impedance technique is feasible.

Originality/value

To the best of the authors’ knowledge, this work is the first to apply piezoelectric ceramics to the monitoring of wood MC, which provides a theoretical basis for the follow-up study of a wide range of wood components and even wood structure MC changes.

Details

Sensor Review, vol. 42 no. 1
Type: Research Article
ISSN: 0260-2288

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