ELASTO-PLASTIC SHEAR BEHAVIOR OF STEEL-INSERTED GLULAM-BEAMS
In recent years various types of hybrid structures such as steel-plate-inserted glulam-beams are adopted for timber road bridges. Since glulams are materials with very Iow shear stiffness which is not always improved by the steel-plate insertion, it is very important to investigate elasto-plastic behaviors of the steel-glulam hybrid beams. In this study, we try to numerically investigate glulam beams and three types of steel-glulam hybrid beams with vertically inserted steel plates (for example on the compression side of all types of the beams, a steel plate is vertically inserted, while on the tension side of each type of the beams, one, two or three steel plates are vertically inserted) in asymmetric four-point-bending test. The numerical calculations are carried out by the GPL-license FEM program CalculiX.F The value of shear stress of each type of hybrid beams reach to the value of shear fracture before the value of axial stress of glulam parts on tension side reach to the value of bending fracture. The results may be caused by the fact that the shear stiffness of the beams is not much improved by the steel insertion, while the bending stiffness of the beams is improved sufficiently. This suggests that shear fracture is more critical than bending fracture in this type of steel-plate-inserted glulam-beams.However, it may be possible to improve shear stiffness of glulam parts depend on insertion condition.
steel-plate-inserted glulam-beams shear stiffness shear stress
Tomohiro Chida Humihiko Gotou Seizo Usuki Atusi Toyoda Takanobu Sasaki
Akita University, Japan University, Japan Mitsui Consultants Co., Ltd., Japan Akita Prefectural University, Japan
国际会议
The 9th International Conference on Steel Space & Composite Structures(第九届国际钢材、空间结构、组合结构会议)
烟台·北京
英文
315-321
2007-10-10（万方平台首次上网日期，不代表论文的发表时间）