BOND BEHAVIOR IN RC TENSION MEMBERS BASED ON THE CHANGE OF CONCRETE FRACTURE CHARACTERISTICS WITH TEMPERATURE

Macroscopic bond behavior identified as tension-stiffening effect in RC members is investigated under various environmental conditions in terms of temperature and moisture through a series of uni-axially loaded tension tests. The experimental result showed somewhat diverse local response on concrete but rather slight variation on macroscopic tension stiffening in stabilized cracking regions when temperature changes. Characteristic response under elevated temperature (75℃) could be grasped as being attributed to varying fracture characteristics and consequent high deformability of concrete.