Seismic qualification of expansion anchors to Canadian nuclear standards

A large number of unique seismic qualification tests were performed on different types of expansion anchors to determine their seismic capabilities. These tests followed the requirements of the Canadian CSA N287.2 as well as the ASTM E 488 Standards. Expansion anchors ranging in diameter from 1/4 to 114in. were subjected to this seismic qualification testing. Strategically designed and standardised concrete blocks were manufactured to receive each expansion anchor. The anchors were installed according to the anchor manufacturer instructions and the installation was consistent with construction practice. Each anchor type and size was subjected to four different types of tests covering static, dynamic, tension and shear loading. The dynamic cyclic loads applied represented a strong earthquake whose spectrum envelops that of the Design Basis Earthquake (DBE). The seismic testing qualification program involved 300 tests. Results of the testing program are obtained for each type of anchor. Results from these tests confirm that these types of expansion anchors have maintained their tension (pull-out) and shear capabilities following a severe seismic shaking.