实心锯材用于住宅式龙门架的研究（英文）

Development of residential-use portal frame made of solid-sawn timbers

一个具有较高木材干燥技术以及精确预切割技术的商业企业开发出了由大截面实心锯材制备的住宅用龙门架体系。该体系的梁柱节点由梁端部和柱端部组成,每个部件都在工厂预制并现场组装,以便与钢滑轨锁在一起。另一方面,柱腿节点由柱子部分和腿部分组成,并采用开槽螺栓连接法将两部分现场连接。通过局部足尺试验评价了梁柱节点与柱腿节点的弯矩转角关系,并将其非线性关系建模为多边形骨架曲线和相应的滞回模型。为了确保由实心锯材制备住宅用龙门架的可能性,由5 m跨距长度、2.7 m檐口高度的干燥后的大截面实心日本雪松锯材制备了足尺龙门架试件,并进行了静态推-拉循环加载测试。结果表明,木质龙门架具有优异的延展性,在1/10弧度的剪切变形角下未出现任何脆性构件失效。同时,利用商业有限元程序进行数值分析,可以预测龙门架的整体非线性性能。

With good timber drying know-how and precise pre-cut techniques, a residential-use portal frame systemmade of large cross sectional solid-sawn timber was developed by a commercial company. The beam-column jointsconsisted of beam-side parts and column-side parts. Each part was prefabricated in factory and assembled on site to-gether along with steel sliding rails. On the other hand, column-leg joints consisted of column-part and leg-part. Twoparts were connected using the slotted bolt connection method on site. Moment-rotational angle relationships of beam-column joints and column-leg joints were evaluated by partial full-scale experiments, and their non-linear relationshipwere modelled into polygonal skeleton curve and corresponding appropriate hysteretic models. In order to make surethe possibility of realizing residential-use portal frame made of solid-sawn timbers, full-scale portal frame specimensof 5 m span length and 2.7 m eave＇ s height made of large cross sectional dried Japanese cedar solid-sawn timberswere fabricated and tested by static push-pull cyclic loading protocol. From the results of this experiment, it was con-firmed that the wooden portal frames showed excellent ductility subject to 1/10 rad shear deformation angle withoutany brittle member failures. Furthermore, by using the numerical analysis （ a commercial finite element method pro-gram）, it was predicted that the portal frames had non-linear behaviors.