PENINGKATAN DAKTILITAS HOLLOW PILE DENGAN
PENAMBAHAN RATIO SPIRAL DAN BETON COR SETEMPAT
Jaka Propika 1 dan Jenny Caroline 2
1,2 Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan FTSP
Institut Teknologi Adhi Tama Surabaya, Jl. Arief Rahman Hakim No.100 Surabaya, 60117
Email: [email protected] 1 , [email protected]
ABSTRACT
The precast hollow pile is a type of pile which has been commonly used in Indonesia. According to
SNI 03-1726-2012 Section 7.14.2.2.5, pile as part of the structure must exhibit ductile behavior to dissipate
the amount of energy due to an earthquake. At one point, it is imperative to note that the major damage
occurs at the transfer between fine soil and coarse soil, thereby an improvement must be considered.
Regardless of this term, however, previous studies have shown the results and also concluded that hollow
pile structure cannot undergo the ductile behavior. Therefore, this present work attempts to provide more
insight into this structure to obtain the more ductile behavior which can meet the requirement as stated in the
provision. This research was based on the prediction, both in analytical and numerical analyses, by using
sectional design approach and finite element package ABAQUS and XTRACT. In this study, three types of
hollow pile structural model were considered, namely Model 1 (control specimen), Model 2 (modified in
increase of spiral volumetric ratio in maximum condition with regards to ACI and SNI), and Model 3
(additional filler inside the hollow section with concrete compressive strength of 67.8 MPa). The results
highlighted that Model 2 had the improvement of displacement and curvature ductility by 82.1% and 96.84%,
respectively, compared to the control specimen. On the other hand, Model 3 showed an increase in
displacement ductility of 88.97% while curvature ductility of 137.15%. Based on overall results, it can be
concluded that the utilization of filler concrete and the influence of spiral volumetric ratio can lead to the
structural upgrade concerning ductility, although in fact, these improvements have not been able to satisfy
the requirement in the provision.
Keywords: hollow pile, displacement, curvature, ductility