196,004 research outputs found
A survey form for the structural health assessment of timber constructions
No full textDespite timber is one of the oldest building materials, it is vulnerable to environmental degradation
actions. Thus, the design of timber structures should integrate the aspects related to the structural
performances together with those related to durability. The vulnerability against decay actions can be
mitigated through several design choices, having different impact on durability performances.
Nevertheless monitoring and maintenance play a fundamental role.
Therefore, given the importance of durability issues in the design and maintenance of timber structures,
a new survey form for the structural health assessment is proposed. The outline is articulated for
addressing structural typology, decay identification and possible interventions. The survey form is
validated on a sample of simple existing structures, demonstrating the reliability and effectiveness of
the evaluation
Development of 3D Advanced Rapid Prototyping Multipurpose Structures with Micro and Nano Materials
No full textA methodology for the service life estimation of timber structures
No full textDriven by the development of energy saving and environmental sustainability policies, the use of timber as a building material has found wide development during the last decades. An integral part of the design of timber buildings is the evaluation of durability, which strongly affects the material performances and therefore the building service life. In the design process the service life of the building components can be estimated through different methodologies. A deterministic approach is based on the Factor Method (ISO 15686). In this regards, the present paper briefly introduce an innovative application of the Factor Method for the prediction of the service life of timber structures. The proposal is based on the use of the Multi-Criteria Decision-Making (MCDM) methods as support tool for the determination of the correction factors. The method is applied and validated on a sample of four case studies
EXPLORING CORRELATIONS BETWEEN NON-DESTRUCTIVE AND DESTRUCTIVE TESTS FOR THE MECHANICAL CHARACTERIZATION OF EXISTING TIMBER STRUCTURES
No full textThe paper focuses on the mechanical characterization and assessment of the state of preservation of existing timber structures. Non-destructive tests (NDT) have great potential in estimating the mechanical properties of wood through in-situ investigations, offering an alternative to destructive laboratory tests. However, their effectiveness depends on the presence of reliable correlations between the NDT parameters and the physical and mechanical properties of wood estimated through destructive test (DT). In this study, a statistical analysis of data obtained from NDT and DT on a sample of ancient timber members in structural dimension from South Italy is presented and the corresponding correlations are showed. The paper includes a brief description of the sample, a focus on the statistical methodology and the results. It also offers a critical analysis of the correlation laws, highlighting those most reliable for in situ investigation
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Endocrine involvement in children with beta-thalassemia major. Transversal and longitudinal studies. I: Pituitary- thyroidal axis function and its correlation with serum ferritin levels
No full text- …
