11,752 research outputs found

    Designing for tapers and defects in FRP-strengthened metallic structures

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    Adhesively bonded FRP strengthening for metallic structures relies critically on the adhesive joint between the FRP and the metal. Current best-practice in design allows the distribution of shear and peel stress along the adhesive connection to be determined, which are compared to the strength of the adhesive joint. This paper considers how this technique can be applied to (a) design stress reduction measures such as tapers, stepped plates and clamps; and (b) assess the significance of defects within the adhesive layer.</p

    Business Model Innovation of JF Logistics Company

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    摘要 随着全球化经济的发展,市场竞争变得越来越复杂。信息时代使得物流供应链管理已上升到企业的战略管理高度。在这样的背景下,本文应用翁君奕老师的介观商务模式创新观点,对JF物流公司所处行业现状进行剖析,重新审视了外部客户市场以及内部自身情况,找出了JF物流公司自身的优势,并结合外部市场客户的需求,提出了“为客户提供个性化的集物流、资金流、信息流于一体的供应链物流服务”这一价值主张,并在此基础上,重新定位客户市场,创新服务产品,理顺内部管理架构和业务流程以支撑和保持这一价值主张。文中同时以例证来说明依据新价值主张所创新的服务产品给JF物流公司所带来的变化,以此说明通过商务模式创新来实行自身的战略...Abstract With the development of the global economy, the competition in market becomes more complicated. In the era of information, logistics and supply chain management is regarded as important as part of the company strategy. Under such background , the author of this essay uses the concept of “JieGuan Business Model Innovation” proposed by Professor Weng Junyi of Xiamen University, and analy...学位:管理学硕士院系专业:管理学院高级经理教育中心(EMBA项目)_管理经济学学号:X200615614

    RC beams shear-strengthened with FRP: Stress distributions in the FRP reinforcement

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    Reinforced concrete (RC) beams may be strengthened for shear with externally bonded fibre reinforced polymer (FRP) composites through complete wrapping, U-jacketing or bonding on their sides only. The two main shear failure modes of such strengthened beams are FRP rupture and debonding. In both modes of failure, the contribution of the bonded FRP reinforcement to the shear capacity of the beam depends strongly on the stress (or strain) distribution in the FRP at the ultimate limit state. This paper presents a numerical study of the FRP stress distribution at debonding failure in U-jacketed or side-bonded beams using a rigorous FRP-to-concrete bond-slip model and assuming several different crack width distributions. Numerical results indicate that Chen and Teng's early simple assumption [Chen JF, Teng JG. Shear capacity of FRP-strengthened RC beams: FRP debonding. Constr Build Mater 2003;17:27-41] for the stress distribution in the FRP results in satisfactory predictions for the effective FRP stress in most cases for both U-jacketed and side-bonded beams. However, it may become unconservative for side-bonded beams that have only light flexural steel reinforcement.Department of Civil and Environmental Engineerin
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