THE ANATOMY OF THE WOODS OF THE HISTORIC DARAN BRIDGE

This study presents the wood anatomy analysis of the historic Daran Bridge, a traditional wooden cantilever structure located over the Daran river (Sarıveliler, Türkiye), that has been in use since the 19th century. Two structural timber samples were examined microscopically using transverse, tangential, and radial sections. Anatomical features such as distinct growth rings, absence of normal resin canals, dentate torus in bordered pits of the tracheid walls, and cross-field pits with a piceoid to taxodioid shape led to the taxonomic identification of Cedruslibani L. (Taurus cedar). The species is native to Southern Anatolia, and the bridge is located within its natural distribution area. Physical and mechanical property analysis (e.g., density: 530 kg/m³; bending strength: 70–85 N/mm²) confirmed the wood’s high durability, strength, and suitability as a load-bearing element. Historically, the selection of Taurus cedar was based on its local availability and resistance to environmental degradation.

IMPACT OF HOLLOW CORE DIAMETER AND BFRP WRAPPING ON AXIAL COMPRESSIVE STATIC PERFORMANCE OF TIMBER

This paper presents an experimental study on the axial compressive static performance of the cylindrical timber-wrapped basalt fiber reinforced polymer (BFRP). Beech and black pine woods were used as cylindrical timber material, polyurethane (PUR) adhesive was used as the adhesive agent, and BFRP was used as fiber-reinforced polymers (FRP). The stress on compression tests was applied to 70 pieces of test samples prepared. The results showed that there was found out that the highest average stress value of 51.8 MPa was achieved inthe black pine cylindrical timber- BFRP wrapping- hollow core (Ø=70 mm)- the beech cylindrical timber blocks- BFRP wrapping samples under compression loading. The lowest average value stress value of 30.78 MPa was found in the black pine cylindrical timber- none hollow core samples. On average, the stress of the black pine cylindrical timber- BFRP wrapping- hollow core (Ø=70 mm)- the beech cylindrical timber blocks- BFRP wrapping samples were68% higher than the stress of the black pine cylindrical timber- none hollow core samples. The influence of the hollow core diameter and the BFRP wrapping type were found statistically significant