不同覆面材料木剪力墙抗侧性能试验研究

Experimental Study on Racking Performance of Light-frame Shear Walls with Various Sheathing Materials

摘要:

对10片尺寸为2.44 m×2.44 m且覆面板分别为进口OSB板、国产OSB板、国产胶合板、玻镁板和石膏板的木框架剪力墙进行了单向加载试验,得到了不同覆面板剪力墙的破坏模式、荷载位移关系,通过计算分析获得了各种剪力墙的屈服和极限荷载、弹性阶段刚度、板材延性等性能指标.研究结果表明:国产胶合板及OSB板剪力墙在承载能力、延性和耗能方面较进口OSB板剪力墙有较大的提高;玻镁板不仅具有较好的防火、防水性能,而且比石膏板的强度高、韧性好.因此国产板材具有良好的力学性能,可以作为轻型木结构剪力墙的覆面板材.

Abstract:

Monotonic experimental study on racking performance of ten light frame shear walls of 2.44 m×2.44 m with five different sheathing materials were conducted.The sheathing materials investigated was the imported OSB panels,domestic OSB panels,domestic plywood panel,magnesium board and gypsum board.Failure modes and load-displacement curves of shear walls with various sheathing materials are obtained and yield load,ultimate load,elastic stiffness and ductility of those shear walls were found through calculation and analysis.Test results show that comparing with shear wall with imported OSB panel,shear walls with domestic plywood and OSB panels improve the bearing capacity,ductility and energy dissipation a lot.Magnesium board is not only of good water and fire resistance but also better strength and toughness compared with gypsum board.Good mechanical properties of domestic sheathing make it applicable in the shear walls of light wood-frame house.