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Analitical Model of Seismic Behavior of Wooden Houses

木结构房屋抗震性能分析模型

基本信息

批准号：
09660181
负责人：
YASUMURA Motoi
金额：
$ 2.11万
依托单位：
Shizuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09660181/
关键词：
Shear Walls Nailed Joiuts Wood frame construction Earthquake response Analysis Hysteresis Model Yield strength Ultimate strength 地震時挙動変形性能

项目摘要

1. Reversed cyclic loading tests on Shear walls and nailed jointsWood-farmed shear walls and nailed joints sheathed with various sheet materials were subjected to reversed cyclic lateral loading to obtain the database for modeling the seismic behavior of wood-framed buildings. Monotonic and reversed cyclic, loading tests were conducted on the shear walls composed of S-P-F two-by-four framing sheathed with 9.5mm. plywood, OSB and 12.5mm gypsum board with GN 50 and GN40, and the followings were concluded. (1) Ultimate strength of nailed joints and shear walls subjected to reversed cyclic loading decreased 20 to 40% and around 20% respectively in nailed joints and shear walls comparing to those in monotonic loading test. (2) Yield and ultimate strength of shear walls obtained from those of nailed joints showed good agreement with experimental results. (3) Equivalent viscous damping rate of shear walls and nailed joints was approximately 15% regardless of displacements.2. Modeling of earthquake response analysisLoad-displacement relationships of nailed joints were modeled from the experimental results. The back-borne curves were, modeled by the different functions within and beyond a boundary displacement in which the displacement larger than the boundary displacement in the opposite direction caused the degradation of strength. The simulation of load-displacement relationship by this model showed good agreement with the experimental results. Load-displacement relationships of wood-framed shear walls were also simulated by using this model. The simulation showed good agreement with the experimental results, and it was proved that this model is applicable to earthquake response analysis of wood-framed structures.

1. 剪力墙和钉接节点的反循环荷载试验采用不同板材覆盖的木结构剪力墙和钉接节点进行了反循环横向荷载试验，获得了木结构建筑抗震性能建模的数据库。对S-P-F 2 × 4框架、9.5mm胶合板、OSB、12.5mm石膏板、GN 50、GN40复合护墙板组成的剪力墙进行了单调和反循环加载试验，得出如下结论：(1)与单调加载试验相比，反向循环荷载作用下钉接节点和剪力墙的极限强度分别降低20 ~ 40%和20%左右。(2)钉接节点剪力墙的屈服和极限强度与试验结果吻合较好。(3)剪力墙与钉接节点的等效粘性阻尼率在不受位移影响的情况下均约为15%。地震反应分析的建模根据试验结果对钉接节点的荷载-位移关系进行了建模。采用边界位移内、边界位移外的不同函数对后载曲线进行建模，其中相反方向的位移大于边界位移会导致强度退化。该模型对荷载-位移关系的模拟结果与试验结果吻合较好。利用该模型对木结构剪力墙的荷载-位移关系进行了数值模拟。仿真结果与试验结果吻合较好，证明该模型适用于木结构的地震反应分析。