1,721,008 research outputs found
Long-term and collapse tests on a timber-concrete composite beam with glued-in connection
No full textThe paper reports the results of a comprehensive experimental test performed on a 6 m span timber-concrete composite beam with glued re-bar connection. The beam had first been subjected to sustained load in unsheltered outdoor conditions for 5 years. Eventually a ramp loading test up to failure was performed. The long-term test showed an increase in deflection mainly during the first two years, while the slip rose during the whole testing period. Thermohygrometric variations of environment caused an important fluctuation of all quantities on both yearly and daily scale. By comparing experimental and analytical results, it is highlighted that composite beams in outdoor conditions should be assigned to the 3rd service class according to the Eurocode 5 (EC5). Analytical predictions based on approximate formulae suggested by such regulation are found to be not conservative for the long-term behaviour and fairly accurate for the collapse behaviour. Since the simplified formulae proposed by the latest versions of the EC5-Parts 1.1 and 2 largely underestimate the actual connection stiffness and strength, it is recommended that realistic values of these properties, such as those obtained through push-out tests, be used when designing timber-concrete composite beams
A LINEAR FINITE ELEMENT MODEL TO STUDY CREEP AND SHRINKAGE EFFECTS IN A TIMBER-CONCRETE COMPOSITE BEAM WITH DEFORMABLE CONNECTIONS
No full textA finite element model for collapse and long-term analysis of steel-concrete composite beams
No full textInfluence of viscous phenomena on steel-concrete composite beams with normal or high performance slab
No full textSimplified approach for the long-term behaviour of timber-concrete composite beams according to the Eurocode 5 provisions
Full text linkThe aim of this paper is to propose a simplified yet accurate solution for the long-term behaviour of TCC’s. The approach will allow the designer to account for the whole loading history of the structure including concrete shrinkage, effect of props during construction, and inelastic strains due to environmental variations. The accuracy will be assessed by comparison with numerical solutions on a number of TCC’s of technical interest. Finally the influence of different environmental conditions such as outdoor and heated indoor conditions on the long-term performance will be discussed
Short- and long-term performance of the “Tecnaria” stud connector for timber-concrete composite beams
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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