FACTORS AFFECTING ANCHOR BOLT DEVELOPMENT

RESULTS ARE REPORTED OF THE INITIAL PHASE OF A RESEARCH PROGRAM TO STUDY DESIGN CRITERIA FOR THE PROPER LENGTHS FOR ANCHOR BOLT EMBEDMENT INTO DRILLED SHAFTS. INTERPRETATION OF THE RESULTS OF 36 ANCHOR BOLTS WITH VARYING EMBEDMENT CONDITIONS INDICATED THAT MANY IMPORTANT ASPECTS OF BEHAVIOR WERE NOT SUFFICIENTLY DOCUMENTED. THE PROGRAM EXTENSION INCLUDED A SERIES OF TESTS ON 26 ANCHOR BOLTS WITH VARYING EMBEDMENT CONDITIONS. MAJOR VARIABLES INCLUDED THE EFFECT OF THE METHOD OF TEST, EFFECT OF CLEAR COVER, EFFECT OF LOW- CYCLE REPEATED LOADING, AND EFFECT OF SHAPE OF THE SHAFT. A SURVEY IS PRESENTED OF THE TRENDS INDICATED IN THE STUDY.