Deformaion capacity of exposed column-base depends on elongation properties of the anchor bolts. The anchor bolt is consist of shank and thread. Shank of the bolt does yield when area ratio of thread to shank is lower than yield ratio. The thread of the bolt yields and short thread may break early under a severe earthquake. Then AIJ provision recommended that area ratio of thred to shank is larger than yield ratio and the shank yields before the thread reaches to its maximum tensile strength. However, it is possible to serve enough deformation capacity of the exposed column-base when thread length ratio set a proper value to a severe earthquake response. Heuce, we performed cyclic loading test on exposed column-base to show the possibility. We investigated the mechanical properties of the column-base by comparing the simple evaluation formula and F.E.M. analysis results. The results showed the F.E.M. analysis has good accuracy with experimental results and the required deformation capacity of the column-base could satisfied by adjusiting the thread length property.
雑誌名
長崎大学大学院工学研究科研究報告
巻
45
号
85
ページ
21 - 27
発行年
2015-07
ISSN
18805574
書誌レコードID
AA12601998
著者版フラグ
publisher
出版者
長崎大学大学院工学研究科
出版者別言語
Graduate School of Engineering, Nagasaki University
露出柱脚の変形性能に関する研究
45_85_21.pdf
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