การประเมินประสิทธิภาพของคานไม้ยางพาราประกอบลามิเนตเสริมกำลังด้วยวัสดุโพลิเมอร์เสริมเส้นใยภายใต้การดัด

Abstract

The main purpose of this research is to develop and evaluate mechanical properties of Para-wood glue laminated beam reinforced with GFRP (glass fiber reinforced polymer) for residential and light – construction. The effects of joint patterns and GFRP reinforcement positions on flexural and shear stiffness, strength, reduction factor due to shear deformation, and failure mode were studied under three and four point (ASTM D198-97) bending beam test. For Para-wood Glulam beam without GFRP reinforcement, test specimens were failed near finger joints on the beam tension side. In case of Para-wood Glulam beams with GFRP reinforcement, joint failure on the tension side following by delamination of GFRP reinforcement was found. In addition, Para-wood Glulam beams with the second joint pattern are recommended in this study. Joint efficiency can be improved by increasing the length of joints.