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http://dx.doi.org/10.12989/scs.2015.18.6.1369

Static behaviour of lying multi-stud connectors in cable-pylon anchorage zone  

Lin, Zhaofei (Department of Bridge Engineering, Tongji University)
Liu, Yuqing (Department of Bridge Engineering, Tongji University)
He, Jun (School of Civil Engineering and Architecture, Changsha University of Science and Technology)
Publication Information
Steel and Composite Structures / v.18, no.6, 2015 , pp. 1369-1389 More about this Journal
Abstract
In order to investigate the behaviour of lying multi-stud connectors in cable-pylon anchorage zone, twenty-four push-out tests are carried out with different stud numbers and diameters. The effect of concrete block width and tensile force on shear strength is investigated using the developed and verified finite element model. The results show that the shear strength of the lying multi-stud connectors is reduced in comparison with the lying single-stud connector. The reduction increases with the increasing of the number of studs in the vertical direction. The influence of the stud number on the strength reduction of the lying multi-stud connectors is decreased under combined shear and tension loads compared with under pure shear. Yet, due to multi-stud effect, they still can't be ignored. The concrete block width has a non-negligible effect on the shear strength of the lying multi-stud connectors and therefore should be chosen properly when designing push-out specimens. No obvious difference is observed between the strength reductions of the studs with 22 mm and 25 mm diameters. The shear strengths obtained from the tests are compared with those predicted by AASHTO LRFD and Eurocode 4. Eurocode 4 generally gives conservative predictions of the shear strength, while AASHTO LRFD overestimates the shear strength. In addition, the lying multi-stud connectors with the diameters of 22 m and 25 mm both exhibit adequate ductility according to Eurocode 4. An expression of load-slip curve is proposed for the lying multi-stud connectors and shows good agreement with the test results.
Keywords
cable-pylon anchorage zone; lying multi-stud connectors; push-out tests; strength reduction; load-slip relationship; FEM analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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