Authors : Ragheed Fatehi Makki, Salah Talib Nimnim and Ashraf Aamir Mohamed
Abstract: This study aims to offer the applicable strengthening technique for axially loaded timber columns using steel angles and battens. The columns which manufactured from timber in buildings oftentimes need strengthening for several reasons such as shortcoming in the columns themselves, having to prop up additional loads than those expected in the primary design or as the result of old age or occasional damage. Experimental work is achieve to study the behavior of timber columns strengthened from outside by steel jacket under axial loads effect. This search includes fabricate nine specimens of timber columns with the same square cross section of 89×89 mm and height of 1000 mm. These specimens classified to four categories, the first category (comprises one column) represents the comparative sample without any kind of reinforcing while second category (involves three columns) strengthened by different sizes of four vertical steel angles at column corners fastened by horizontal battens of the constant size and spacing, the study expanded to third category (comprises three specimens) strengthened by constant sizes of four vertical steel angles at column corners fastened by different sizes of steel plates at top and bottom of columns, the other variable was studied in the fourth category which (involves two columns) strengthened by constant sizes of four vertical steel angles at column corners fastened by (horizontal battens of constant sizes but different in spacing). The results indicated that the strengthening technique of timber columns by using outside steel jacket can improve the ultimate load by 38.7-112.9%.
Ragheed Fatehi Makki, Salah Talib Nimnim and Ashraf Aamir Mohamed, 2019. Load Carrying Capacity of Timber Columns Strengthening by Steel Jacket. Journal of Engineering and Applied Sciences, 14: 6747-6752.