Towards an efficient method of predicting vehicle-induced response of bridge

2016 ◽  
Vol 33 (7) ◽  
pp. 2067-2089 ◽  
Author(s):  
Zhen Sun ◽  
Zilong Zou
Keyword(s):  
Iterative Method ◽  
Design Methodology ◽  
Computational Algorithm ◽  
Interaction Force ◽  
Induced Response ◽  
Vehicle Model ◽  
Content Type ◽  
Bridge Model ◽  
Beam Bridge ◽  
Bridge Models

Purpose The purpose of this paper is to present a practical and efficient iterative method for predicting vehicle-induced response of bridge. Design/methodology/approach The vehicle-bridge interaction (VBI) problem is generalized mathematically and a computational algorithm for VBI is proposed. This method rests on an iterative procedure, which utilizes the whole interaction process for iteration. By this means, vehicle and bridge become totally uncoupled and are only linked by the contact force history. This method provides flexibility to choose simplified or refined vehicle and bridge models for the VBI problem, as well as open options for different commercial FEM software without specialized codes. Findings The method is verified through two numerical examples. The first example uses a simple 1D beam bridge model, which illustrates the procedure of this method and demonstrates its fast convergence in several iterations. The second example employs a realistic full 3D finite element bridge model, which shows that the method easily connects complex FEM bridge models in ABAQUS with a calibrated vehicle model in Matlab. The dynamic response of the bridge is reliably calculated within only a few iterations. Originality/value The proposed iterative method separates vehicle and bridge into independent subsystems in the computational process, thus providing more flexibility to utilize commercial FEM softwares. Its efficiency is realized through choosing the whole interaction force process for iteration, which considerably reduces the iteration steps.

Improving stability in physical human–robot interaction by estimating human hand stiffness and a vibration index

2019 ◽  
Vol 46 (4) ◽  
pp. 529-540 ◽  
Author(s):  
Feifei Bian ◽  
Danmei Ren ◽  
Ruifeng Li ◽  
Peidong Liang
Keyword(s):  
Time Delay ◽  
Real Time ◽  
Time Domain ◽  
Design Methodology ◽  
Interaction Force ◽  
Human Robot Interaction ◽  
Experimental Results ◽  
Human Hand ◽  
Robot Interaction ◽  
Content Type

Purpose The purpose of this paper is to eliminate instability which may occur when a human stiffens his arms in physical human–robot interaction by estimating the human hand stiffness and presenting a modified vibration index. Design/methodology/approach Human hand stiffness is first estimated in real time as a prior indicator of instability by capturing the arm configuration and modeling the level of muscle co-contraction in the human’s arms. A time-domain vibration index based on the interaction force is then modified to reduce the delay in instability detection. The instability is confirmed when the vibration index exceeds a given threshold. The virtual damping coefficient in admittance controller is adjusted accordingly to ensure stability in physical human–robot interaction. Findings By estimating the human hand stiffness and modifying the vibration index, the instability which may occur in stiff environment in physical human–robot interaction is detected and eliminated, and the time delay is reduced. The experimental results demonstrate significant improvement in stabilizing the system when the human operator stiffens his arms. Originality/value The originality is in estimating the human hand stiffness online as a prior indicator of instability by capturing the arm configuration and modeling the level of muscle co-contraction in the human’s arms. A modification of the vibration index is also an originality to reduce the time delay of instability detection.

Mediator assisted simultaneous negotiations with multiple customers for order acceptance decision

2019 ◽  
Vol 26 (5) ◽  
pp. 1581-1604 ◽  
Author(s):  
Sujan Piya
Keyword(s):  
Iterative Method ◽  
Decision Process ◽  
Design Methodology ◽  
Research Work ◽  
Aspiration Level ◽  
Order Acceptance ◽  
Working Mechanism ◽  
Content Type ◽  
Make To Order ◽  
Multiple Issues

Purpose The purpose of this paper is to develop a framework for the manufacturer of a make-to-order company to simultaneously negotiate with multiple customers through mediator to achieve order acceptance decisions (OADs). Design/methodology/approach The paper developed mathematical models for the manufacturer, as well as customers to revise their offers during negotiations. Moreover, the paper also proposed a method for the mediator to carry out his assigned duties to assist in negotiation. In the decision process, mediator acts as a bridge between the manufacturer and customers to reach an agreement. A numerical example is enumerated to illustrate the working mechanism and superiority of proposed framework as compared to the framework where simultaneous negotiations are carried out without the presence of mediator. Findings Iterative method of negotiation conducted without mediator leads to delay in reaching agreement as the aspiration level of manufacturer offer and counter-offer of customer will never cross each other. In addition, the party who submits the offer first may suffer as the opponent can take the advantage of his/her offer during negotiation, thereby, derailing the issue of fairness. Introducing mediator between the manufacturer and the customer for their negotiations could overcome these two issues. Numerical analysis clearly illustrates that, in average, the rounds of negotiation to reach an agreement can be reduced by 22 percent using proposed negotiation framework. In addition, the fairness in negotiations can be improved by 33 percent with the incorporation of mediator. Originality/value Through continuing research efforts in this domain, certain models and strategies have been developed for negotiation. Iterative method of negotiations without mediator will help neither the manufacturer nor the customer in terms of fairness and negotiations round to reach an agreement. To the best of the author’s knowledge, so far, this is the first instance of research work in the domain of OAD and negotiation framework that attempts to incorporate mediator for simultaneous negotiation between manufacturer and customers on multiple issues simultaneously.

Engaging with a Laclau & Mouffe informed discourse analysis: a proposed framework

2014 ◽  
Vol 9 (4) ◽  
pp. 351-370 ◽  
Author(s):  
Sara Walton ◽  
Bronwyn Boon
Keyword(s):  
Data Analysis ◽  
Social Science ◽  
Iterative Method ◽  
Analytical Method ◽  
Design Methodology ◽  
Discourse Theory ◽  
Content Type ◽  
Political Analysis ◽  
Textual Data ◽  
Data Analytic

Purpose – The purpose of this paper is to present an analytical method through which a political analysis of intra and inter-organizational conflicts may be conducted. Design/methodology/approach – The iterative method of data analysis the paper presents is based on a consolidation of work using Laclau and Mouffe’s discourse theory across both management and organization and social science disciplinary domains. Findings – While the politically orientated discourse theory of Laclau and Mouffe has begun to be used by management and organization researchers, little guidance is available for how to actually conduct the analysis of data using this discourse approach. The method the paper proposes involves making explicit an analytical process for reading available textual data. Originality/value – The value of this paper is primarily for management and organization researchers who are attracted to discourse theory but feel intimidated or confused about how to operationalize this theory into data analytic practice.

The Study of Diaphragm Beam Influence to Load Transverse Distribution of T-Beam Bridge

2011 ◽  
Vol 368-373 ◽  
pp. 557-562
Author(s):  
Guo Hui Gao ◽  
Zhen Yu Xie ◽  
Ran He ◽  
Jian Yi Song
Keyword(s):  
Theoretical Data ◽  
Mechanical Analysis ◽  
Concentrated Load ◽  
Transverse Distribution ◽  
Finite Element Software ◽  
Bridge Model ◽  
Diaphragm Beam ◽  
Beam Bridge ◽  
Bridge Models ◽  
T Beam

Diaphragm beam has grate influence to load transverse distribution factors of T-beam bridge. Two steel T-beam bridge models were made in this article, one have diaphragm beam and the other one have not. Concentrated load was applied to both of them, and mechanical analysis of the T-beam bridge model was carried out by finite element software. Compared with experiment data and theoretical data, it shows that: when the concentrated load was applied to mid-span of 1#,2# and 3# beam of the two kind bridges, the 1#,2# and 3# beam load transverse distribution factors of T-beam bridge without diaphragm beam is larger than that of T-beam bridge with diaphragm beam by 19.3%~23.2%、25.3%~30.6% and 48.1%~50.1% respectively.

Experimental study on blast damage of RC T-beam bridge

Sensor Review ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sheng Peng ◽  
Lu-jun Cai ◽  
Tian-hua Jiang ◽  
Xu Kai
Keyword(s):  
Damage Evaluation ◽  
Concrete Material ◽  
Content Type ◽  
Blast Damage ◽  
Damage Repair ◽  
Expansion Stage ◽  
Technical Specifications ◽  
Beam Bridge ◽  
Bridge Models ◽  
T Beam

Purpose The purpose of this paper is to investigate the explosive performance and explosion damage mechanism of T-beam bridge structure. Design/methodology/approach On the basis of the existing specification, two T-beam bridge models were designed and fabricated. Test specimens of different explosive dosage and different blast height were carried out. The mechanical process, failure mode, blast damage model, damage identification mechanism and blast evolution law and quantitative evaluation were taken into account. Findings The results revealed that the web plate fracture failure is the key to the unstable failure of the whole T-beam bridge. The explosion failure phenomenon and blast damage evaluation criterion of RC T-beam bridge was divided into five stages: the original cracks stage of concrete material (D = 0 ∼ 0.1), the fractures initiation stage of concrete material (D = 0.1 ∼ 0.3), the stable expansion stage of cracks in concrete material (D = 0.3 ∼ 0.55), the unstable expansion stage of cracks in concrete material (D = 0.55 ∼ 0.8), the explosion fracture of steel bars and the overall instability and damage of the bridge (D = 0.8 ∼ 1.0), which can also be described as basically intact, slight damage, moderate damage, severe damage and collapsed. Social implications The research result will provide basis for the antiknock evaluation and damage repair technical specifications of the RC T-beam bridge. Originality/value The research results of damage evaluation serve as a basis for damage repair and reinforcement of bridge structures after explosion.

Building internal heat dissipation of special shaped columns composed of concrete-filled square steel tubes based on thermal bridge models

2019 ◽  
Vol 38 (3) ◽  
pp. 441-449
Author(s):  
Zijing Wang
Keyword(s):  
Finite Element ◽  
Energy Saving ◽  
Heat Dissipation ◽  
Residential Buildings ◽  
Condensation Temperature ◽  
Steel Tubes ◽  
Content Type ◽  
Thermal Bridge ◽  
Bridge Model ◽  
Bridge Models

Purpose Special shaped columns composed of concrete-filled square steel tubes have broad application prospects in steel structure residential buildings. The paper aims to discuss this issue. Design/methodology/approach In this paper, the thermal bridge problem of special-shaped column structures is studied, T-shaped column composed of concrete-filled square steel tubes is taken as an example, the finite element thermal bridge model is established by ANSYS software, the heat treatment is calculated by the software and the results are output. Findings According to the finite element results, it can be found that in the thermal bridge model, the temperature distribution is uniform, the heat flux density is small and the heat dissipation where the steel plate locates is serious. The lowest temperature of the thermal bridge is greater than the air condensation temperature, and the affected area is about 0.2 m, which is larger than the thickness of the wall and will not cause too much impact on the wall. It will help to suppress heat dissipation and achieve energy-saving and heat preservation inside the buildings. Originality/value The experimental results prove the effectiveness of the special-shaped column structure for building energy-saving buildings. This study provides some theoretical basis for further application of special-shaped column structures in architecture.

scholarly journals Vulnerable adults in police custody

2019 ◽  
Vol 22 (1) ◽  
pp. 5-8
Author(s):  
Ian Cummins
Keyword(s):  
Design Methodology ◽  
Research Literature ◽  
Police Custody ◽  
England And Wales ◽  
Content Type ◽  
Increased Risk ◽  
Vulnerable Adults

Purpose The purpose of this paper is to discuss the recent National Appropriate Adult Network (NAAN) report on the role of the appropriate adult. Design/methodology/approach This paper is based on the NAAN report and a review of relevant policy and research literature. Findings There to Help 2 highlights that there are still significant gaps in the provision of appropriate adult schemes across England and Wales. These gaps potentially place vulnerable adults at increased risk. Originality/value This paper is a review of recent research.

Co-workers’ perceptions of and reactions to employee’s involuntary demotion

2019 ◽  
Vol 41 (4) ◽  
pp. 740-757 ◽  
Author(s):  
Sophie Hennekam ◽  
Subramaniam Ananthram ◽  
Steve McKenna
Keyword(s):  
Design Methodology ◽  
Emotional Responses ◽  
Emotional Reaction ◽  
Content Type ◽  
Informational Justice ◽  
Behavioural Responses ◽  
Behavioural Reaction ◽  
Three Stages ◽  
Depth Interviews ◽  
The Way

Purpose The purpose of this paper is to investigate how individuals perceive and react to the involuntary demotion of a co-worker in their organisation. Design/methodology/approach The authors draw on 46 semi-structured in-depth interviews (23 dyads) with co-workers of demoted individuals. Findings The findings suggest that an individual’s observation of the demotion of a co-worker has three stages: their perception of fairness, their emotional reaction and their behavioural reaction. The perception of fairness concerned issues of distributive, procedural, interpersonal and informational justice. The emotional responses identified were feelings of disappointment/disillusion, uncertainty, vulnerability and anger. Finally, the behavioural reactions triggered by their emotional responses included expressions of voice, loyalty, exit and adaptation. Originality/value Perceptions of (in)justice perpetrated on others stimulate emotional and behavioural responses, which impacts organisational functioning. Managers should therefore pay attention to the way a demotion is perceived, not only by those directly concerned, but also by co-workers as observers.

Consumer value creation through WhatsApp use

2019 ◽  
Vol 32 (4) ◽  
pp. 455-471
Author(s):  
Jorge Cruz-Cárdenas ◽  
Jorge Guadalupe-Lanas ◽  
Ekaterina Zabelina ◽  
Andrés Palacio-Fierro ◽  
Margarita Velín-Fárez ◽  
...  
Keyword(s):  
Latin American ◽  
Value Creation ◽  
Emotional Support ◽  
Design Methodology ◽  
Instant Messaging ◽  
Role Performance ◽  
Content Type ◽  
Consumer Value ◽  
Depth Interviews ◽  
Practical Implications

Purpose The purpose of this paper is to understand in-depth how consumers create value in their lives using WhatsApp, the leading mobile instant messaging (MIM) application. Design/methodology/approach The study adopts the perspective of customer-dominant logic (CDL) and uses a qualitative multimethod design involving 3 focus groups and 25 subsequent in-depth interviews. The research setting was Ecuador, a Latin American country. Findings Analysis and interpretation of the participants’ stories made it possible to identify and understand the creation of four types of value: maintaining and strengthening relationships; improving role performance; emotional support; and entertainment and fun. In addition, the present study proposes a conceptual model of consumer value creation as it applies to MIM. Practical implications Understanding the way consumers create value in their lives using MIM is important not only for organizations that offer MIM applications, but also for those companies that develop other applications for mobile phones or for those who wish to use MIM as an electronic word-of-mouth vehicle. Originality/value The current study is one of the first to address the topic of consumer behavior in the use of technologies from the perspective of CDL; this perspective enables an integrated qualitative vision of value creation in which the consumer is the protagonist.

scholarly journals Advantages and potential challenges of data management in e-maintenance

2019 ◽  
Vol 25 (3) ◽  
pp. 378-396 ◽  
Author(s):  
Arian Razmi-Farooji ◽  
Hanna Kropsu-Vehkaperä ◽  
Janne Härkönen ◽  
Harri Haapasalo
Keyword(s):  
Data Management ◽  
Design Methodology ◽  
Management Practices ◽  
Future Research ◽  
Conceptual Approach ◽  
Content Type ◽  
Different Types ◽  
Maintenance Systems ◽  
Industry Leader ◽  
Practical Implications

Purpose The purpose of this paper is twofold: first, to understand data management challenges in e-maintenance systems from a holistically viewpoint through summarizing the earlier scattered research in the field, and second, to present a conceptual approach for addressing these challenges in practice. Design/methodology/approach The study is realized as a combination of a literature review and by the means of analyzing the practices on an industry leader in manufacturing and maintenance services. Findings This research provides a general understanding over data management challenges in e-maintenance and summarizes their associated proposed solutions. In addition, this paper lists and exemplifies different types and sources of data which can be collected in e-maintenance, across different organizational levels. Analyzing the data management practices of an e-maintenance industry leader provides a conceptual approach to address identified challenges in practice. Research limitations/implications Since this paper is based on studying the practices of a single company, it might be limited to generalize the results. Future research topics can focus on each of mentioned data management challenges and also validate the applicability of presented model in other companies and industries. Practical implications Understanding the e-maintenance-related challenges helps maintenance managers and other involved stakeholders in e-maintenance systems to better solve the challenges. Originality/value The so-far literature on e-maintenance has been studied with narrow focus to data and data management in e-maintenance appears as one of the less studied topics in the literature. This research paper contributes to e-maintenance by highlighting the deficiencies of the discussion surrounding the perspectives of data management in e-maintenance by studying all common data management challenges and listing different types of data which need to be acquired in e-maintenance systems.

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