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Behaviour of lightweight composite trusses in fire – A case study
Ian Burgess,Roger Plank,Seng-Kwan Choi 국제구조공학회 2007 Steel and Composite Structures, An International J Vol.7 No.2
On September 11th 2001, the twin towers of the World Trade Center in New York City were struck by two hijacked airplanes. Despite severe local damage induced by the impact, the towers were able to sustain 102 and 56 minutes of the subsequent multi-storey fires before collapsing. The purpose of this study is to contribute to the understanding of the in-fire performance of composite trusses by examining the behaviour of the longer-span type used in the towers. It makes no attempt to be a forensic study of the actual events. Using the finite element package Vulcan, the structural mechanics of typical long-span composite floor trusses are explained, under a variety of scenarios, as the fire temperatures rise. Different boundary conditions, degrees of protection and loading are all covered, the results being presented mainly in the form of graphs of deflection and internal force of members against time.
Peter J. Burgess 한국식품연구원 2014 Journal of Ethnic Foods Vol.1 No.1
Background: This study provides development guidance to manufacturers of gochujang to optimize its appeal among UK consumers. Preliminary studies focused on consumer attitudes toward the traditional product and decided on the development of a new ethnic product concept. It was concluded that the modified product should be positioned in the narrow speciality/oriental accompaniments retail category as a distinctive, premium, and regionally authentic table sauce. A structured approach to consumer research was used to investigate consumer acceptability and preferences. This paper describes how these methods were used to optimize the product in terms of market positioning and use. Methods: Two principal approaches were used in the study: (1) a choice-based conjoint test to consider options in terms of packaging, design, pricing, product descriptions and attributes; and (2) a home placement test to explore the relative appeal of the sensory properties of two product variants and their potential applications. Results: Across all six attributes assessed in the conjoint study (n = 676), the sensory properties of the product (43%) followed by brand (24%) were the most important attributes in driving preference. Price (12%) and country of origin (11%) were the next most important, with packaging size and material at 6% and 5%, respectively, being least important. From the home placement study (n = 58), the proposed products were aligned with consumers' existing consumption behaviors. However, it was evident that the products segmented consumer response due principally to their hotness. Conclusion: While reducing the hotness of the product has the potential to broaden appeal, this could erode its positioning as a distinctive, premium product with authentic flavors appealing to a specific market segment. Retaining the modified gochujang flavor profile but linking to an established UK speciality sauce brand may offer the most effective platform to enter the UK market.