| Summary: | 碩士 === 國立交通大學 === 土木工程學研究所 === 86 ===
The expansion anchor has been used widely to affix the building envelope or annexed structure on concrete because they are easy to install.
This study is to test the pullout and shear capacity of the expansion anchor which is generally used in our country. The results were compared with design codes of ACI-349 and Japan Architecture Society.
The results show that when the expansion anchor fails due to pullout force, the failure model is concrete cone failure. The angle between the failure surface and horizontal surface is about 30-45 degree. The sleeve expansion anchor has better ductile behavior than the drilled-in expansion anchor when subjected to pullout force. Calculated value from design code is smaller than test data.
Inadequate distance between anchors and distance to edge could decrease pullout strength of the expansion anchor. For the latter case, the failure model may become edge failure.
When the expansion anchor subjected to shear force, the failure model is steel failure. Shear strength depends on the strength of steel material and test qualifications, it has little relation to concrete.
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