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Experimental Study on Optimum Strength of Beam-to-column Connection Consisting of Wide Flange Members with Out-of-plane Beams

面外梁宽翼缘构件梁柱连接最佳强度试验研究

基本信息

批准号：
63550415
负责人：
MAKINO Minoru
金额：
$ 1.54万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550415/
关键词：
Beam to column connection of wide flanges Out of plane beams Yield ratio of panel to member Max. shear strength Energy absorption capacity Width thickness ratio of member 柱はり接合部最大せん断耐力解析部分骨組実験

项目摘要

In a steel frame of wide flange members beam to column connections have a great deal of shear deformation capacity which is essential in earthquake resistant design of steel frames. An experimental study on the load carrying capacity of these connections stiffened by out of plane beams are carried out. The experimental parameters in this test are the yield ratio of a connection and connected members, alpha , and width thickness ratios of column flanges.Obtained results are as follows : (1) Elasto-plastic deformation behavior of frames subjected to horizontal shear forces changed at the yield ratio, alpha , of about 0.4. (2) In the frame with the yield ratio, alpha , exceeding 0.4, the maximum shear strength of the connection increased a little in the presence of the out of plane beams. (3) And the energy absorption of connections from beginning to maximum strength was not gained by the presence of the out of plane beams. (4) The width thickness ratio of column flanges gives no remarkable difference in the maximum shearing strength and the energy absorption capacity of the connection. However, deterioration of shearing strength after maximum is greater in the width thickness ratio of 15 than in that of 10. (5) In the case of alpha less than 0.4 , the maximum shear strength of the connection increased remarkably in the presence of out of plane beams and the lower alpha the more remarkable. (6) The energy absorption capacity up to the maximum strength is also remarkable in the case of alpha less than 0.4 . (7) The out of plane beams give the stiffness to the connection web irrespective of width thickness ratio of flanges in members. The stiffened connection web shows a great deal of energy absorption capacity and stable restoring force characteristics of the frame.Thus the yield ratio of 0.4 in a connection and members is preferable in actual spatial frames in a view point of earthquake resistant design.

宽翼缘钢框架梁柱连接节点具有很大的抗剪变形能力，这是钢框架抗震设计中必不可少的。对平面外加劲梁连接的承载力进行了试验研究。试验参数为节点和被连接构件的屈服比α和柱翼缘的宽厚比，试验结果表明：（1）水平剪力作用下框架的弹塑性变形性能在屈服比α为0.4左右时发生变化。(2)在屈服比α大于0.4的框架中，平面外梁的存在使节点的最大抗剪强度略有增加。(3)从开始到最大强度的能量吸收的连接并没有获得的平面外梁的存在。(4)柱翼缘宽厚比对节点的最大抗剪承载力和能量吸收能力影响不大。然而，在宽度厚度比为15时，最大值之后的剪切强度的劣化大于宽度厚度比为10时。(5)当α小于0.4时，平面外梁的存在显著提高了节点的最大抗剪承载力，且α越小越显著。(6)在α小于0.4的情况下，达到最大强度的能量吸收能力也很显着。(7)平面外梁使连接腹板的刚度与构件中翼缘的宽厚比无关。加劲连接腹板具有很强的能量吸收能力和稳定的恢复力特性，从抗震设计的角度考虑，实际空间框架中节点和杆件的屈服比取0.4较为合适。