@article{oai:soar-ir.repo.nii.ac.jp:00012387,
 author = {Ahmed,  Tanim and Shimizu,  Shigeru},
 journal = {THIN-WALLED STRUCTURES},
 month = {Mar},
 note = {This paper presents the results of the study on thin walled steel portal frames, which are used in Japan as basic structural frames for motorway viaducts. A serious problem found in many such frames is the development of fatigue cracks at the beam to column connection. To act as a measure against the fatigue failure, in some cases a hole is provided at the beam-column connection of the frames. In this study, dynamic analysis using real earthquake data from 3 different earthquakes were carried out to examine the influence of such a hole on the global behavior of the frame and also on the local out of plane displacement around the location of the hole. Non-linear, large displacement analysis was performed using the FEM program MSC. Marc. The hole radius was varied and used as a parameter of study. The hole had significant effect on local out of plane displacement and global behavior, specifically when the radius of the hole was larger than 100 mm., Article, THIN-WALLED STRUCTURES. 52:53-60 (2012)},
 pages = {53--60},
 title = {A study of the seismic effects on a portal frame having a hole at the beam-column connection},
 volume = {52},
 year = {2012}
}