UPGRADING THE DEFORMATION CAPACITY OF ANCHOR-BOLTS IN THE EXPOSED-TYPE COLUMN BASES OF EXISTING OLD STEEL STRUCTURES
A main reason for early tensile brittle fracture of the anchor-bolts in the steel exposed-type column bases under the past earthquake is that the thread part has the decreased sectional area of 75% of the regular part of the anchor-bolt. Many existing old steel structures in Japan might contain such anchor-bolts whose deformation capacity is very poor and urgent diagnosis and upgrading is needed. This study proposes the method of upgrading the performance of anchor-bolts in existing old steel structures. A high-strength bolt equivalent to F14T is screwed to reinforce the thread part, after the hole is emptied from the top of the anchor bolt. This paper shows the performance of the upgraded anchor-bolts through the experimental studies.
Deformation capacity Tensile test Pull-out Test Upgrading Exposed-type column base
A. Matsuo K. Sawada K. Yamamoto T. Takamatsu H. Tamai
Dept. Of Social and Environmental Engineering ,Hiroshima University. Higashi-Hiroshima, Japan Faculty of Eng., Hiroshima Institute of Technology, Hiroshima, Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）