Seismic analysis of pile in liquefiable soil and plastic hinge

Journal Title: Geotechnical Research - Year 2017, Vol 4, Issue 4

Abstract

Liquefaction is one of the leading seismic actions that cause extensive damage to buildings and infrastructure during earthquakes. In many historic cases, plastic hinge formations in piles were observed at inexplicable locations. This project investigated the behaviour of piled foundations within soils susceptible to liquefaction by using numerical analysis carried out in Abaqus software in terms of plastic hinge development. Three different soil profiles were considered in this project that varied in the thickness of both the liquefiable and non-liquefiable layers, pile length and free- and fixed-head pile conditions. Modelling a single pile as a beam–column element carrying both axial and El Centro record earthquake loading produced results of the seismic behaviour of piles that could be assessed by force-based seismic design approaches. The displacements and deformations induced by dynamic loads were analysed for piles affected by liquefaction, and the results were used to demonstrate the pile capacity and discuss the damage patterns and location of plastic hinges. Parametric studies generally demonstrate that plastic hinge formation occurs at the boundaries of the liquefiable and non-liquefiable layers; however, the location can be affected by a variety of factors such as material properties, pile length and thickness of the liquefied soil layer.

Authors and Affiliations

Rohollah Rostami

Keywords

Related Articles

Measurement, interpretation and recommended use of laboratory strength properties of fibrous peat

Peat deposits are complex natural formations encountered in many geographical areas. Peat itself is considered as a challenging geomaterial, with many aspects of its behaviour seemingly remaining enigmas. This state-of-t...

The compressibility of natural and reconstituted marine clays

There is mounting evidence in favour of replacing the e against log10(s0v) diagram, conventionally used to represent soil compressibility in an oedometer, with a log(v) against log(s0v) diagram, which significantly impro...

Research-oriented ground investigation projects at Changi, Singapore

The Changi East Reclamation projects in Singapore were implemented in five phases starting from 1991 and completed in 2005. Due to the excessive magnitude of settlement likely to occur over a long period of duration caus...

Mechanical behaviour of sand stabilised with colloidal silica

The response of sand stabilised with colloidal silica aqueous gel is examined in the laboratory, under direct shear, triaxial and normal compression loading, in comparison to that of untreated sand of similar density to...

Benefits of pre-loading temporary props for braced excavations

Using soil profiles typical of excavations in London, UK and Dubai, UAE calculations have been carried out to compare the performance of temporary steel and proprietary hydraulic propping. Numerical modelling indicates t...

Download PDF file
  • EP ID EP292647
  • DOI 10.1680/jgere.17.00009
  • Views 48
  • Downloads 0

How To Cite

Rohollah Rostami (2017). Seismic analysis of pile in liquefiable soil and plastic hinge. Geotechnical Research, 4(4), 203-213. https://europub.co.uk./articles/-A-292647