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1 – 10 of 160Riza Suwondo, Lee Cunningham, Martin Gillie, Made Suangga and Irpan Hidayat
The robustness of building structures in a fire has recently drawn wide attention. This study presents the progressive collapse analysis of steel frame building structures under…
Abstract
Purpose
The robustness of building structures in a fire has recently drawn wide attention. This study presents the progressive collapse analysis of steel frame building structures under localised fire. The main objective of this study is to propose methods to enhance the structural collapse resistance of such structures in fire.
Design/methodology/approach
A modelling method was developed and validated against both experimental and analytical studies. Then, a series of robustness analyses were performed to investigate the interaction among the members and the pattern of load distribution within the structures. These analyses show that lateral resistance and load redistribution have a vital role in the robustness of the building. Thus, two approaches have been adopted to enhance the robustness of the focused steel frame during a fire.
Findings
It is found that increased size of floor beams and vertical bracing systems are effective measures in preventing whole structure collapse. The larger beam section is able to prevent catenary action so that the load in the failed columns can safely transfer to the adjacent columns without buckling. On the other hand, the bracing system improves the lateral resistance that can accommodate the lateral force when catenary action occurs in the beam.
Originality/value
Previous studies have focused on the collapse mechanism of steel frame structures. However, the parameters affecting the structural robustness in a fire have not yet been explored. To address this gap, this study adopted numerical modelling to undertake parametric studies to identify effective methods to improve the robustness of such structures under fire conditions.
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Umesh Sharma, Virendra Kumar, Praveen Kamath, Bhupinder Singh, Pradeep Bhargava, Yogendra Singh, Asif Usmani, Jose Torero, Martin Gillie and Pankaj Pankaj
In present study, a full-scale testing of reinforced concrete (RC) frame sub-assemblage has been investigated under fire subsequent to simulated seismic loading. First part of the…
Abstract
In present study, a full-scale testing of reinforced concrete (RC) frame sub-assemblage has been investigated under fire subsequent to simulated seismic loading. First part of the sequential loading consisted of a quasi-static cyclic lateral loading corresponds to life safety level of structural performance on the test frame. In the second part of the test, a compartment fire was ignited to the pre-damaged test frame for one hour duration simulating fire following earthquake (FFE) scenario. The results showed that the first cracking was observed at the end joints of the roof beams after the frame experienced a 30 mm cyclic lateral displacement. One hour heating and eleven hour cooling was tracked and temperatures were recorded. A knocking sound was heard from the fire compartment after 5 minutes of the fire ignition. An excessive degradation of the concrete material at a number of locations of the frame sub-assemblage was observed during visual inspection after the fire test. The Nondestructive tests (NDT) were also conducted to ascertain the damage in the RC frame at the various stages of loading. The test results developed an understanding of the behaviour of RC frame sub-assemblage in FFE.
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John Gales, Luke Bisby and Martin Gillie
The fire-safe structural design and construction of unbonded post-tensioned (UPT) flat plate concrete structures has recently come under debate in the UK, and questions are being…
Abstract
The fire-safe structural design and construction of unbonded post-tensioned (UPT) flat plate concrete structures has recently come under debate in the UK, and questions are being raised regarding the response to fire of post-tensioned concrete slabs. Related to these concerns is the real world response of continuous UPT tendons inside such structures both during and after a fire, which is largely unknown and depends on many potentially important factors which are not currently accounted for in standard fire tests. Several credible concerns exist for UPT concrete structures in fire, most notably the potential for premature tendon rupture due to localized heating which may result from a number of possible causes (discussed herein). The research presented in this paper deals specifically with the time-temperature-stress-strength interdependencies of stressed UPT tendons under localized transient heating, as may be experienced by tendons in a real UPT building in a real fire. Nineteen high temperature stress relaxation tests on UPT tendons of realistic length and parabolic longitudinal profile are reported. It is shown that localized heating of UPT tendons is likely to induce premature tendon rupture during fire, even in structures which meet the prescriptive concrete cover requirements imposed by available design codes.
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John Gales, Luke Bisby and Martin Gillie
This is Part II of a two part paper dealing with the current state of knowledge of the fire-safe structural design and construction of unbonded post-tensioned (UPT) flat plate…
Abstract
This is Part II of a two part paper dealing with the current state of knowledge of the fire-safe structural design and construction of unbonded post-tensioned (UPT) flat plate concrete structures. Part I provided detailed results of nineteen transient high temperature stress relaxation tests on restrained UPT tendons of realistic length and parabolic longitudinal profiles. Experimentation identified several credible concerns for UPT concrete structures in fire, most notably the potential for premature tendon rupture due to localized heating, which may result from a number of possible causes in a real structure. The real world response of continuous UPT tendons both during and after heating is largely unknown, and is dependent on factors which are not currently accounted for either in standard fire tests or by available prescriptive design guidance. This second part of the paper presents and applies a numerical model to predict the time-temperaturestress-strength interdependencies of stressed UPT tendons under localized transient heating, as may be experienced by tendons in a real concrete building in a real fire. The model is used, along with previously developed and validated computational models for heat transfer and prestress relaxation in UPT tendons, to assess existing prescriptive concrete cover requirements for UPT slabs. It is shown that localized heating of UPT tendons is likely to induce premature tendon rupture during fire, and that current prescriptive code procedures based on concrete cover alone are, in general, insufficient to prevent this. Based on the data presented it appears that minimum code prescribed concrete covers for UPT structures require revision if premature tendon rupture during fire is to be avoided.
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Annemaree Carroll, Robyn M. Gillies, Ross Cunnington, Molly McCarthy, Chase Sherwell, Kelsey Palghat, Felicia Goh, Bernard Baffour, Amanda Bourgeois, Mary Rafter and Tennille Seary
Student competency in science learning relies on students being able to interpret and use multimodal representations to communicate understandings. Moreover, collaborative…
Abstract
Purpose
Student competency in science learning relies on students being able to interpret and use multimodal representations to communicate understandings. Moreover, collaborative learning, in which students may share physiological arousal, can positively affect group performance. This paper aims to observe changes in student attitudes and beliefs, physiology (electrodermal activity; EDA) and content knowledge before and after a multimodal, cooperative inquiry, science teaching intervention to determine associations with productive science learning and increased science knowledge.
Design/methodology/approach
A total of 214 students with a mean age of 11 years 6 months from seven primary schools participated in a multimodal, cooperative inquiry, science teaching intervention for eight weeks during a science curriculum unit. Students completed a series of questionnaires pertaining to attitudes and beliefs about science learning and science knowledge before (Time 1) and after (Time 2) the teaching intervention. Empatica E3 wristbands were worn by students during 1 to 3 of their regularly scheduled class sessions both before and after the intervention.
Findings
Increases in EDA, science knowledge, self-efficacy and a growth mindset, and decreases in self-esteem, confidence, motivation and use of cognitive strategies, were recorded post-intervention for the cohort. EDA was positively correlated with science knowledge, but negatively correlated with self-efficacy, motivation and use of cognitive strategies. Cluster analysis suggested three main clusters of students with differing physiological and psychological profiles.
Practical implications
First, teachers need to be aware of the importance of helping students to consolidate their current learning strategies as they transition to new learning approaches to counter decreased confidence. Second, teachers need to know that an effective teaching multimodal science intervention can not only be associated with increases in science knowledge but also increases in self-efficacy and movement towards a growth mindset. Finally, while there is evidence that there are positive associations between physiological arousal and science knowledge, physiological arousal was also associated with reductions in self-efficacy, intrinsic motivation and the use of cognitive strategies. This mixed result warrants further investigation.
Originality/value
Overall, this study proposes a need for teachers to counter decreased confidence in students who are learning new strategies, with further research required on the utility of monitoring physiological markers.
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Jason Paul Mika, Graham Hingangaroa Smith, Annemarie Gillies and Fiona Wiremu
This paper aims to examine indigenous governance and economies of iwi Maori (Maori tribes) in Aotearoa New Zealand. Research into persisting inequities amongst iwi that have…
Abstract
Purpose
This paper aims to examine indigenous governance and economies of iwi Maori (Maori tribes) in Aotearoa New Zealand. Research into persisting inequities amongst iwi that have settled treaty claims and the potential for intervention through new governance models and indigenous entrepreneurship contextualise the paper.
Design/methodology/approach
Kaupapa Maori (Maori philosophy) is used as an indigenous methodology to facilitate and empower transformative change, underpinned by Maori knowledge, language and culture. A multi-level approach is used to collect data from international, national and local tribal organisations. Validity is established through stakeholder engagement.
Findings
A central challenge in the post-treaty settlement context is exponentialising tribal capabilities because of the multiple purposes ascribed to post-settled iwi. Four themes, characterised as “unfolding tensions”, offer a critique and basis for solving tribal development challenges: how do tribes create culturally grounded global citizens; how do tribes rebalance wealth creation and wealth distribution; how do tribes recalibrate tribal institutions; and how do tribes embed entrepreneurship and innovation within their economies?
Research limitations/implications
As data collection is still underway, the paper is conceptual.
Practical implications
Five strategies to address unfolding tensions are identified for tribes to consider.
Social implications
Tribal governors and tribal members are implicated in the analysis, as well as the architects of post-treaty settlement governance models.
Originality/value
The paper contributes to theorising about tribal governance, economies and entrepreneurship.
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Mohammad Tayeenul Hoque, Mohammad Faisal Ahammad, Nikolaos Tzokas and Gillie Gabay
The purpose of this paper is to develop a conceptual framework on the dimensions of dynamic marketing capability (DMC) and its relationship with export performance. The paper also…
Abstract
Purpose
The purpose of this paper is to develop a conceptual framework on the dimensions of dynamic marketing capability (DMC) and its relationship with export performance. The paper also proposes the mediating role of competitive hybrid strategy and the moderating role of environmental responsiveness in explaining the relationship between DMC and export performance.
Design/methodology/approach
By following the dynamic capability notion of the marketing and competitive strategy literature, this paper proposes a novel conceptualization of the DMC development process and the possible effect of DMC on attaining competitive advantage.
Findings
The paper postulates that a firm’s DMC can reflect complementary power when its higher-level marketing capabilities are bundled together to detect distributing channel members’ crucial needs, competitors’ action plans and satisfying market demand. As yet little is known about the main underlying dimensions of higher-level DMC construct, the paper contributes in proposing the key dimensions of DMC.
Originality/value
This research advances the knowledge-based view and resource-based views and evolves a solid foundation of DMC constructs comprising four higher-order marketing capabilities, namely, ambidextrous market orientation, customer relationship management capability, brand management capability and new product development capability. Thus, this paper contributes in DMC literature in explaining export performance.
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Vijay Pereira, Glenn Muschert, Arup Varma, Pawan Budhwar, Michael Babula and Gillie Gabay
In the last four years, since Volume I of this Bibliography first appeared, there has been an explosion of literature in all the main functional areas of business. This wealth of…
Abstract
In the last four years, since Volume I of this Bibliography first appeared, there has been an explosion of literature in all the main functional areas of business. This wealth of material poses problems for the researcher in management studies — and, of course, for the librarian: uncovering what has been written in any one area is not an easy task. This volume aims to help the librarian and the researcher overcome some of the immediate problems of identification of material. It is an annotated bibliography of management, drawing on the wide variety of literature produced by MCB University Press. Over the last four years, MCB University Press has produced an extensive range of books and serial publications covering most of the established and many of the developing areas of management. This volume, in conjunction with Volume I, provides a guide to all the material published so far.
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Kieron Sheehy, Rajni Kumrai and Martin Woodhead
The paper aims to explore young people's experiences of having access to personal advisors (PAs), from Connexions, a support and guidance service.
Abstract
Purpose
The paper aims to explore young people's experiences of having access to personal advisors (PAs), from Connexions, a support and guidance service.
Design/methodology/approach
Semi‐structured interviews were conducted, in two phases, with young people in a large new town. Thematic analysis highlighted significant issues and suggested factors that might differentiate between those in employment, education and training and those not in this position.
Findings
Young people's relationship with their Connexions PA emerged as a significant factor in mediating the extent to which they used the service as a “portal” to opportunities and resources. For some young people faced with complex and challenging circumstances, the relationship with their PA provided a uniquely stable and valued source of support.
Research limitations/implications
Although drawn from a small and focused sample, the results suggests that the large‐scale cuts to the service, currently underway, could have a significant impact on young people in difficult circumstances.
Practical implications
The identity of the Connexions service creates issues of access for potential service users.
Originality/value
The research illustrates the positive impact that PAs can have in the complex and challenging situations which some young people encounter. It highlights the nature of the relationship developed with PA as a key issue in facilitating positive changes in the lives of young people. It also suggest that the categories of not in education, employment and training and education, employment and training are too simplistic as descriptors of the young peoples lives or the work undertaken with them by PAs.
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