Test methods for seismic qualification of post-installed anchors

Title: Test methods for seismic qualification of post-installed anchors
Author(s): J.F. Silva
Paper category : conference
Book title: International Symposium on Connections between Steel and Concrete
Editor(s): R. Eligehausen
Print-ISBN: 2-912143-25-X
e-ISBN: 2351580346
Publisher: RILEM Publications SARL
Publication year: 2001
Pages: 551 - 563
Total Pages: 13
Nb references: 11
Language: English

Abstract: The qualification of post-installed anchors for use in seismic environments in the U.S. has been addressed independently by a number of different groups, including ICBO Evaluation Service, Inc., the Structural Engineers Association of Southern California (SEAOSC), ACI, and the telecommunications industry. Some of these methods have been derived from approaches developed in the nuclear industry to account for a variety of possible events (earthquake, explosion, impact).

The primary focus of most of the test methods current and proposed is the response of the installed anchor to external cyclic loading, tension and shear. With the exception of the NEBS criteria, which consists of shake-table testing, strain rate effects are not taken into account. Two methods, the Provisional Test Method developed by ACI Committee 355 and the German nuclear standard developed by the Deutsches Institut für Bautechnik (DIBt), explicitly consider damage to the concrete in the form of a static crack passing through the anchor location. The SEAOSC criteria provides a comparison of the postinstalled anchor with an "equivalent" cast-in-place headed anchor, and results in loaddisplacement information (stiffness degradation, total slip) for cyclic loading throughout the entire load range (to failure). Results are presented for one anchor tested to three of these criteria: ICBO ES AC01 Method 2, SEAOSC, and the German nuclear standard.
Conclusions are drawn regarding the effectiveness of the respective test methods.

Online publication: 2009-12-31
Publication type : full_text
Public price (Euros): 0.00