Racking Tests of Plywood Sheathed Frames and Braced Frames
Racking Tests of Plywood Sheathed Frames and Braced Frames
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胶合板护套框架和支撑框架的货架试验
DOI：
10.2488/jwrs.52.312
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发表时间：
2006
影响因子：
0.3
通讯作者：
M. Tahara
中科院分区：
文献类型：
--
作者：
Y. Hirashima;M. Tahara
为了明确9 mm厚胶合板木框架和截面45 mm×90 mm支撑木框架的结构性能，进行了货架试验。在胶合板护套框架中，观察到的框架的唯一故障是用于安装胶合板的钉子被拔出。另一方面，在支撑框架中观察到多种故障，包括支撑屈曲。观察到的荷载和剪切变形角曲线包络线表明，支撑框架的刚度、最大荷载、最大荷载剪切变形角、最大荷载百分之八十的荷载及其对应的变形角均低于胶合板框架。根据测试结果计算出的胶合板框架和支撑框架的乘数分别为 2.84 和 1.91。胶合板护套框架和支撑框架的参考剪切强度分别由屈服点处的载荷和结构特征系数得出的载荷确定。胶合板护套框架和支撑框架的等效粘胶阻尼系数分别为 0.139 和 0.104。支架中的拉力与压力之比为0.719。
Racking tests were conducted to clarify experimentally the structural performance of wooden frames sheathed with 9 mm-thick plywood and frames with braces 45 mm×90 mm in cross section. In the plywood sheathed frames the only failure observed of the frames was by withdrawal of nails used for installation of the plywood. On the other hand, in the braced frames many sorts of failure were observed including brace buckling. The envelopes observed on load and shear deformation angle curves showed that the braced frames had lower values than the plywood sheathed frames for stiffness, maximum load, shear deformation angle at the maximum load, the load at eighty percent of the maximum load and deformation angle corresponding to it. The multipliers calculated from the test results were 2.84 and 1.91 for the plywood sheathed frame and the braced frame, respectively. The reference shear strengths for the plywood sheathed frame and the braced frame were determined by the load at the yield point and the load derived from the structural characteristic factor, respectively. The equivalent viscose damping factors were 0.139 and 0.104 for the plywood sheathed frame and the braced frame, respectively. The ratio of tensile to compressive force in the brace was 0.719.