The effect of aftershock on 2D RC frame founded on piles with P-Y curves

Abstract

U ovom radu prikazan je način modelovanja drugog udara (zemljotresa), pojave čiji je značaj zapažen tokom druge polovine 20 veka. Navedeni su konstruktivni sistemi kod kojih je bitno razmatranje drugog udara. Detaljnije je prikazan model skeletne AB konstrukcije, odnosno 2D AB fasadnog okvira fundiranog na bušenim AB šipovima, prečnika 60cm. Dinamička interakcija tlo-šip, odnosno nelinearno ponašanje tla je modelovano horizontalnim p-y krivama za pesak, primenom multiplastic link elemenata. Za akcelerogram El Centro tokom vremenske analize (TH) razmatrani su: globalno pomeranje, (lokalni) drift i stanje plastičnih zglobova.

This paper presents the manner of modeling the aftershock (in an earthquake), the phenomenon whose significance has been noted in the second half of the 20th century. Itlists the constructional systems in which the consideration of the aftershock is important. It shows in more detail the model of the skeletal RC construction, i.e. the 2D RC facade frame constructed on the 60cm-diameter drilled RC piles. The dynamic interaction soil-pile, i.e. the non-linear behaviour of the soil is modelled with the horizontal p-y curves for sand, applying multiplastic link elements. For the accelerogram El Centro during time history (TH) the global and (local) drift, the condition of plastic hinges were considered.