Experimental Study On Dynamic Characteristics
Of UHPC Pedestrian Cable Stayed Bridge
Author(s)
W. J. Chin, Y. J. Kim, E. S. Choi, J. Y. Kang & B. S. Kim
Abstract
The first pedestrian cable stayed bridge using ultra-high performance concrete
(UHPC) has been designed and constructed in Korea. The 200MPa class UHPC
is the fruit of the research performed by the Korea Institute of Construction
Technology (KICT). UHPC is an innovative and ultra-high strength material
with compressive strength larger than 180MPa that has been developed to secure
the ductility and strength of the structural members. UHPC exhibits significantly
improved tensile, flexural and shear strengths enabling to minimize the crosssectional
depth. However, the significant autogenous shrinkage developed by
UHPC is also potentially favouring the occurrence of initial cracking in the case
of structures presenting complicated shapes. Considering such characteristics of
UHPC, a pedestrian cable stayed bridge using UHPC has been erected inside the
site of KICT. The dynamic characteristics of the precast UHPC deck were
evaluated through performance tests on the first UHPC pedestrian cable-stayed
bridge. Examination of the maximum acceleration and displacement responses at
the ends of the girder is carried out according to the excitation method. The
estimated natural frequency, and measured vertical displacements and
accelerations are compared with the design criteria. The corresponding results
verify the applicability of UHPC not only to pedestrian cable stayed bridge but
also to roadway cable stayed bridge.
Keywords: ultra high performance concrete, pedestrian cable stayed bridge,
dynamic characteristics, hybrid concept.
Keywords
ultra high performance concrete, pedestrian cable stayed bridge,
dynamic characteristics, hybrid concept
Related Book
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