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Development of a new wonder frame constriction by applying posts and beams with follow core

通过应用带跟随核心的柱和梁开发出一种新的奇迹框架收缩

基本信息

批准号：
02556020
负责人：
OKUMA Motoaki
金额：
$ 3.71万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02556020/
关键词：
Glue-lam LVL Axial bolt Hollowed post Finger joint Long span beam Bearing wall 中空材長尺(長スパン)梁材木構造継手仕口カラマツ材実大試験長軸ボルトシュミレ-ション

项目摘要

Studies were divided into following two subjects.I. Shearing properties of wall frameworks composed of LVL posts with hollow cores Shearing tests of wall frameworks fixed with long bolts were conducted.Experimental results are summarized as follows:* The rising of the post where the lateral load was applied and sinking of the opposite side was so small that the rotation of the wall was almost equal to zero.* When a post was subjected to lateral loading, the post remained straight and did not bend. Consequently, the post resistance to the lateral load may have been due to the partial compression strength generated at the bottom of the post towards the horizontally attached sill and girder. For this reason, the shearing strength was smaller than expected.II. End jointing of glue-lam beam and bending properties of the jointed beams. Larch glue-lams with two or four holes longitudinaly on the cross section were end jointed by finger jointing and fastened with long bolts. These end jointed beams were tested by four points bending. The MOE was shown to be increased by the moment at the both ends of the beam which generated by the tensile stress of the bolts. Also, the MOR of the jointed beam increased. After the failure of finger jointing, the beam still keeps a load bearing capacity to a certain extent on account of the existence of bolts. This system is recognized to be safe and very reliable.

本研究主要分为以下两个方面：一、研究方法。空心单板层积材立柱组合墙体框架的抗剪性能进行了长螺栓连接墙体框架的抗剪试验，试验结果表明：侧力作用下立柱的上升和对侧的下沉很小，墙体的转动几乎为零。当立柱承受侧向载荷时，立柱保持平直，没有弯曲。因此，支柱对横向荷载的抵抗力可能是由于支柱底部朝向水平连接的门槛和大梁产生的部分压缩强度。因此，抗剪强度比预期的要小.胶合板梁端部连接及连接梁的弯曲性能。落叶松胶合板采用指接法进行端接，用长螺栓固定，胶合板横截面上开有两孔或四孔。对端接梁进行了四点弯曲试验。研究表明，螺栓拉应力在梁两端产生的弯矩会使莫伊增大。同时，节点梁的莫尔比也有所增加。指接失效后，由于螺栓的存在，梁仍保持一定的承载能力。该系统被认为是安全和非常可靠的。