PUSH-OUT TEST OF LARGE STUD SHEAR CONNECTORS EMBEDDED IN UHPC
The static behavior of large stud shear connectors embedded in ultra-high performance concrete (UHPC) was investigated via an experimental study.A total of 18 push-out test specimens were tested with various parameters including stud diameter, stud aspect ratio, concrete strength, and concrete slab thickness.Two types of headed studs with the diameter of 22mm and 30mm were used.Test results showed that extensive splitting cracks propagated on the concrete slab for the normal strength concrete specimen whereas no appreciable cracks were found for the UHPC specimen with 30 mm studs.This phenomenon indicates that UHPC matches well with large studs.The shear strength, shear stiffness and ductility of a 30mm stud are approximately 15%, 45% and 60% higher than that of a 22mm stud, respectively.Stud aspect ratio and concrete slab thickness showed no obvious influence on the static behavior of the test specimens and short stud shear connectors with an aspect ratio of 2.3 could develop full strength in UHPC slabs.
Ultra-high performance concrete (UHPC) Push-out test Large headed stud Shear strength Load-slip curve
Jianan Qi Jingquan Wang Qi Wang
Southeast University, Nanjing, China
国际会议
福州
英文
641-649
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）