The paper presents the outcomes of an experimental investigation on the long-term behaviour of timber-to-timber composite (TTC) floors assembled using a cambering-prestressing (CP) procedure previously proposed by the authors. The short-term effectiveness of such technique has been demonstrated in previous literature where it is shown that by exploiting the capability of the screw connectors to apply a compression force on the joining timber members, it is possible to obtain a camber and a prestressed condition without any use of other external devices or propping. To prove the applicability of the aforementioned CP procedure to real life design-scenarios, the long-term efficacy should be investigated. With such aim, four TTC floor specimens of 5.0 m of span and different connection layouts, were loaded in flexure under controlled environmental conditions for a period up to almost 1.5 years. One of the main results from the long-term monitoring of the specimens is that the floors uplift achieved by applying the CP procedure was found to be persistent over time with minimal camber losses.

Testing of long-term behaviour of pre-stressed timber-to-timber composite (TTC) floors / Riccadonna, Daniele; Walsh, Kevin; Schiro, Gianni; Piazza, Maurizio; Giongo, Ivan. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 236:(2020), p. 117596. [10.1016/j.conbuildmat.2019.117596]

Testing of long-term behaviour of pre-stressed timber-to-timber composite (TTC) floors

Riccadonna, Daniele;Schiro, Gianni;Piazza, Maurizio;Giongo, Ivan
2020-01-01

Abstract

The paper presents the outcomes of an experimental investigation on the long-term behaviour of timber-to-timber composite (TTC) floors assembled using a cambering-prestressing (CP) procedure previously proposed by the authors. The short-term effectiveness of such technique has been demonstrated in previous literature where it is shown that by exploiting the capability of the screw connectors to apply a compression force on the joining timber members, it is possible to obtain a camber and a prestressed condition without any use of other external devices or propping. To prove the applicability of the aforementioned CP procedure to real life design-scenarios, the long-term efficacy should be investigated. With such aim, four TTC floor specimens of 5.0 m of span and different connection layouts, were loaded in flexure under controlled environmental conditions for a period up to almost 1.5 years. One of the main results from the long-term monitoring of the specimens is that the floors uplift achieved by applying the CP procedure was found to be persistent over time with minimal camber losses.
2020
Riccadonna, Daniele; Walsh, Kevin; Schiro, Gianni; Piazza, Maurizio; Giongo, Ivan
Testing of long-term behaviour of pre-stressed timber-to-timber composite (TTC) floors / Riccadonna, Daniele; Walsh, Kevin; Schiro, Gianni; Piazza, Maurizio; Giongo, Ivan. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 236:(2020), p. 117596. [10.1016/j.conbuildmat.2019.117596]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/245373
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