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STUDY ON ENERGY ABSORPTION CAPACITY AND FRACTURE OF HAUNCHED BEAMS WITH FRICTION-SLIP DIVICES

摩擦滑移装置弓形梁吸能能力及断裂研究

基本信息

批准号：
11650598
负责人：
TSUJIOKA Shizuo
金额：
$ 2.3万
依托单位：
FUKUI UNIVERSITY OF TECNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

The objective of this study is to create the haunched rolled-H beams with the friction-slip device preventing brittle fracture against a major seismic attack.1. To clarify the dynamic hysteresis characteristics and the permissible region for the scuffing, the dynamic tests were conducted on the high-strength bolted friction-slip joints with the slotted hole. The energy absorption capacity of the joints where the outer plates have the slotted hole is larger than that of the joints where the inner plate has the slotted hole, the hysteresis loop is the rigid-plastic type and the cumulative slip deformation is significantly affected by the bolt clamping force and the slip velocity. And a new friction joint using the plate washers and the main plate with zero hole clearance is proposed and the fatigue properties of the high-strength bolted friction joints with standard, oversized and slotted holes are discussed.2. To evaluate the fabricability and the weldability of the haunch in the actural shop fabrication, the full-size mock-up of the bottom haunch were fabricated. The lack of penetration and the defective welding are found at the intersection of the haunch and the rolled-H section memmber. Furthermore, the bending tests were conducted on the flange plate cut off the rolled-H sectiom member. The occurrence of cracking on the plate bending and the level of plastic bending are discussed.3. To evaluate the plastic behavior if the haunched rolled-H section beams, the monotonic and the cyclic loading tests were carried out. The deformation capacity of the haunched beam is smaller than that of the uniform beam and the deformation capacity is not governed by the fabricability and weldability of the haunch. The cumulative rotation capacity is smaller for the specimen with non-stiffener at the junction of the haunch than for those with transverse stiffener.

这项研究的目标是创造出具有摩擦滑移装置的有肩轧H型梁，以防止在重大地震袭击下发生脆性断裂。为了弄清胶合的动力滞回特性和胶合允许范围，对开槽孔高强度螺栓摩擦滑移接头进行了动态试验。外板开槽节点的吸能能力大于内板开槽节点的吸能能力，节点的滞回曲线为刚塑性，节点的累积滑移变形受螺栓夹紧力和滑移速度的影响较大。提出了一种新型的零孔间隙垫板与主板摩擦接头，并对标准孔、超大孔和开槽孔高强度螺栓摩擦接头的疲劳性能进行了讨论。为了评估实际车间制造中尾部的可加工性和焊接性，制作了底部尾部的全尺寸模型。在H型钢腹板与滚压H型钢构件的交界处，出现了熔透不足和焊接缺陷。此外，还对滚压H型钢构件的翼缘板进行了弯曲试验。讨论了板材弯曲产生裂纹的原因和塑性弯曲的程度。为了评价H型钢腹板梁的塑性性能，进行了单调加载试验和循环加载试验。加肩梁的变形能力小于均匀梁的变形能力，变形能力不受后梁的可加工性和焊接性的影响。在臀部交界处设置非加劲肋的试件，其累积转动能力小于设置横向加劲肋的试件。