Burning Test of Steel Bar - Timber Composite Beam

Abstract

From a viewpoint of the current climate crisis, there has been much recent interest in using timber structural members in large buildings because timber can be used as renewable natural resource, and moreover, in severe earthquake prone zones, such as Japan, they are more desired on the grounds of light weight of timber members. We are developing a frame system consisting of hybrid timber members reinforced with deformed steel bar using epoxy resin adhesive. In order to practice the system, it is necessary to investigate fire resistance performance of the members. This paper reports a burning test of a beam burned for 60-minute semi-fireproof using burning marginal layer ,i.e., charring layer.

A New Method for Modelling Temperature Within Steel Bar - Timber Composite Beam Using Data by Burning Test

“…In reality, the charring border approaches the point/m, but from the perspective of the charring border, the point/m can be considered to be approaching with a relative velocity/vc toward. The distance/S between the point/m and the charring border is expressed by Equation (1).…”

“…Moreover, verification of the capacity calculated using the modelled temperature distribution and reduction ratio of strength and elasticity of wood of beam is necessary to be conducted by using capacities obtained by loading during the beam burning test. We conducted 60-minute-burning test of a timber-steel rebar composite beam and will report its outline and experimental results in WCTE2023 [1]. This paper reports results of temperature variation inside the glulam timber and a new concept of modelling of temperature within the beam with finite measured temperature data.…”