轻型木结构剪力墙木骨架的抗侧性能  

Lateral performance of shear wall frame of light timber structure

作　　者：周华 柏洁 文伟 任廷亮 周浩 ZHOU Hua;BAI Jie;WEN Wei;REN Tingliang;ZHOU Hao(College of Civil Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学土木工程学院,贵阳550025

出　　处：《林业工程学报》2021年第4期72-79,共8页Journal of Forestry Engineering

基　　金：贵州省科技计划项目(黔科合基础2018[1405])。

摘　　要：轻型木结构是以规格材作为木骨架,通过木基结构板材或石膏板覆面而成的木结构建筑,规格材与规格材、骨架与面板之间通过钉子连接。轻型木结构墙体在试验研究和实际工程中的破坏往往是由钉节点失效导致的,面板钉节点破坏后水平侧向力仅由木骨架承担,因此,单独研究木骨架水平抗侧力很重要。为了解剪力墙中木骨架在单独作用时的最大承载能力与荷载-位移的关系,首先通过试验研究骨架钉和骨架钉节点力学性能以及空木骨架抗侧性能关系,推导出钉节点计算公式;再通过木骨架几何构造导出自身惯性矩,在水平力作用下,木骨架侧向变形主要由木骨架弯曲变形、骨柱轴向变形、骨架钉节点拔出、剪切和弯曲变形共同作用所至,通过木骨架力矩平衡和钉节点数据分析,导出木骨架抗侧性能计算公式。结果表明:理论推导骨架钉节点计算公式与试验结果相符合;木骨架侧向变形公式仅考虑荷载上升阶段,理论与试验结果相吻合,钉节点抗弯性能和边骨柱钉子拔出对木骨架抗侧承载能力影响最显著。减小木骨架高宽比和骨柱间距、增大其宽度有利于提高木骨架的抗侧承载能力。The light wood structure is a wooden structure building with the dimension lumber as the skeleton, which is made of wood-based structural panels or gypsum covered boards. Being connected by nails, a skeleton of house can be made from the dimension lumber and wood-based panels. During the experiments and engineering practices, the failures of light timber structure walls are often caused by the failure of panel nail joints, while the covered panels and the wood skeleton are not easily damaged, so the horizontal lateral force is only borne by the panel nail joints of the wooden skeleton after the failures. Therefore, it is particularly important to study the horizontal lateral resistance of wood skeleton alone. In order to understand the relationship between the maximum bearing capacity and the load-displacement of the timber skeleton in the shear wall when it acts alone, firstly, the relationship between the mechanical properties of the connection nails and the skeleton nail joints, and the lateral resistance of the empty wood skeleton were studied by experiments, and the calculation formula of nail node was deduced. Then the inertia moment was derived from the geometric structure of the skeleton. Under the action of horizontal force, the lateral deformation of the skeleton was mainly caused by the bending deformation of the skeleton, the axial deformation of the bone column, the pull-out, shear and bending deformations of the skeleton nail joints. The calculation formula of lateral resistance of wooden skeleton was derived by the moment balance and nail node data analysis. The results showed that the theoretical derivation of the calculation formula of skeleton nail joints was in accordance with the experimental results. The lateral deformation formula of timber frame only took into account the rising stage of load, which was in agreement with the experimental results. The lateral deformation of the wooden skeleton was mainly caused by the skeleton nail joints, but the mechanical deformation of each piece of dime

关 键 词：轻型木结构 木骨架 钉节点 力学性能 抗侧承载力 

分 类 号：S781.2[农业科学—木材科学与技术] TU366.2[农业科学—林学]