Abstract
This paper presents the results of creep tests of Laminated Veneer Lumber Sengon (LVL Sengon) beams, aiming to determine the creep factor and to establish the prediction beam deflection based on the initial creep test data. The LVL Sengon beams have a cross section of 40 mm by 80 mm and a clear span length of 2,000 mm, they were loaded at midspan for three different stress levels: 30%, 40%, and 50% of the ultimate load within 30, 60, and 90 days. Each loading level consists of four repetitive beams where one beam was wrapped with a plastic sheet. The test results showed that for 90 days the bending creep test can not determine the secondary creep yet. Curve fitting of bending creep test data indicated that the parameters of the Modified Burger creep model of the first 30 days can be accurately used to predict the beam deflection curve up to 60 and 90 days of loading.
Highlights
Creep is one factor that must be considered in the design of a building structure
Sengon (Paraserianthes falcataria) laminated veneer lumber (LVL Sengon) is an engineered wood material that is recently developed as a structural component in Indonesia and is manufactured by laminating veneers obtained from Sengon timber [5]
This study aims to examine the bending creep of Laminated Veneer Lumber (LVL) Sengon through rheological and phenomenological models
Summary
Creep is one factor that must be considered in the design of a building structure. Creep can cause serviceability problems due to excessive deformation or to a reduction in strength [1]. The total deformation during the service life of a building must be limited. Understanding creep behaviour of material and structure will allow one to predict the behaviour of a building during its service life [2, 3], including buildings using wood and wood based (wood engineered) materials [4]. Sengon (Paraserianthes falcataria) laminated veneer lumber (LVL Sengon) is an engineered wood material that is recently developed as a structural component in Indonesia and is manufactured by laminating veneers obtained from Sengon timber [5]. Sengon is a fast- growing timber that can replace solid wood.
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