| Title |
An Experimental Study on the Structural Behavior of Portal Frames with Semi-rigid Connections |
| Authors |
Yoon Sung-Kee ; Shin Young-Sig ; Lee Seung-Eun ; Lee Chy-Hyoung |
| Keywords |
Portal Frame ; End-plate Connections ; Hollow Flange Sections ; Rotational Stiffness |
| Abstract |
The purpose of this study is to investigate the structural behavior of connections of portal frame built up from Hollow Flange sections. Connections of portal frame is composed of column base, rafter to column joints and rafer to rafter joints. The rafter is connected to the column or the rafer by bolted end-plate connection. Three types of joint have been selected for testing-column base, rafter to column joints (what is called the knee joint) and rafer to rafter joints. Total number of test specimens is seventeen. The parameter of experiment is thickness of end plate, the number of bolt and the shape of end-plate. Two types of loading for knee joint tests are selected. One is static loading and the other is cycling loading. For column base tests, cantilever testing mode is applied. The strength, rotationnal stiffness of portal frame connections is investigated by the tests of bolted end-plate connections. And moment-rotationnal relationship and load-displacement of the connection tests are proposed. For the connections of portal frame, it is known that 8-bolt extended end plate connections have superior stiffness and rotation capacity. Also, 8-bolt flush end-plate connections shows good strength similar to 8-bolt extended end-plate connection. |