TITLE:
The Effective Buckling Length on Numerical Study of Pipe-Sectioned Pier-Pile Integral Steel Structure
AUTHORS:
Takayuki Omori, Akira Kasai, Rei Kohara
KEYWORDS:
Pire-Pile Integral Steel Structures, Effective Buckling Length, Pipe Section
JOURNAL NAME:
Open Journal of Earthquake Research,
Vol.6 No.4,
September
20,
2017
ABSTRACT:
Pier-Pile integral structures provide construction works with many environmental
and landscape advantages. For example, the space required to construct
these structures is smaller than that of other bridges due to the footing
being removed, meaning that it is not necessity to greatly change the surroundings
of these bridges. While there are environmental and landscape advantages,
there are also a few demerits for the overall land-scape designs, including
demerits in the design of this proposed structure which consists of
relatively slender parts. This proposed structure has already been constructed
in areas where possibility of a severe earthquake is low. However, some problems
that have yet to be examined are related to the use of this proposed
structure in areas where earthquakes are frequent. Lacking detailed studies of
its behavior during severe earthquakes, it is currently difficult to construct
these structures in Japan. Consequently, it is necessary to investigate in detail
limited performance about compression and bending moment, and earthquake-
resistant performance of these structures in order to resolve these
problems. In this paper, It was clarified the relationship between the rigidity
of the ground and the effective buckling length by buckling analysis and elasto-
plastic finite deformation analysis. Moreover, it was proposed a simplified
formula using a proposed characteristic value β and several factors for analysis
accuracy. A simplified formula would support to determine the effective
buckling length to design the pier using the load-bearing capacity curve based
on the slenderness ratio parameter.