Yazar "Stephenson, Victoria" seçeneğine göre listele

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    Environmental performance assessment using monitoring and DVS testing
    (Ice Publishing, 2015) Aktaş, Yasemin Didem; D'Ayala, Dina; Erkal, Aykut; Stephenson, Victoria
    It is now widely accepted that the adverse effects of climate change have become more visible over recent last decades, and current climatic trends suggest that more severe conditions are to follow. In relation to extreme weather events due to climate change, various material degradation phenomena and loss of structural integrity, due mostly to moisture-related deteriorating agents, have been observed on the existing building stock, especially historic buildings. The identification and quantification of such adverse effects is therefore of utmost importance, and environmental monitoring is one of the strongest tools to achieve this aim. This paper provides detailed information regarding on-site environmental monitoring work carried out on a sixteenth century timber frame cottage in Tewkesbury, Gloucestershire, England, along with hygroscopic characterisation using the dynamic vapour sorption (DVS) technique. The results obtained from monitoring and DVS testing are discussed to give detailed insight into hygrothermal damage mechanisms and the resulting loss of strength/physical integrity due to adverse environmental impacts on historic building envelopes.
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    Öğe
    Evaluation of environmental impact on historical stone masonry through on-site monitoring appraisal
    (Geological Soc Publ House, 2013) Erkal, Aykut; D'Ayala, Dina; Stephenson, Victoria
    This paper presents the design and application of an environmental monitoring system on the historical site of Odda's Chapel in Deerhurst, Gloucestershire, UK, and the determination of hygroscopic behaviour of the original building materials to obtain long-term moisture content variation. The monitoring system provides a comprehensive profile of hygrothermal conditions in the walls at the locations where moisture conditions are potentially causing decay and damage. The system makes use of temperature and relative humidity sensing technology placed on the wall construction, providing continuous data including rainfall, wind-driven rain and runoff rain measurements. The relative merits and results of the designed system are evaluated and discussed, as well as the implications of its application in the conservation of historical structures. The environmental monitoring results show general deterioration in the shell of the building. Internal wall surface measurements are essential for the documentation of wall interior response and should be conducted across the wall section at several locations. The fact that 91% of in-wall recorded relative humidity (RH) values are greater than 75% RH throughout the monitoring period demonstrates the need for measures to conserve this historical stone masonry.