Analysis of a potential collision of buildings during earthquake based on computer simulation

Abstract

U slučajevima kada dilatacijske razdjelnice između susjednih zgrada nisu dovoljne, za vrijeme zemljotresa sudaraju se pojedini dijelovi objekata. Pri tome dolazi do lokalnih oštećenja ili čak rušenja dijelova zgrada jer su sile udara velikog intenziteta. Da bi se to izbjeglo, treba posebnu pažnju posvetiti projektiranju aseizmičkih razdjelnica. U radu je prikazana parametarska analiza potencijalnog sudara dvije višespratne zgrade, primjenom programskog paketa SAP2000v15, s ciljem da se ispita što se dešava ako su razdjelnice projektirane u skladu sa standardima koji važe u Srbiji, a ipak dođe do sudara u nekim razmatranim slučajevima. Korišten je model s fleksibilnom osnovom u interakciji s tlom. U dinamičkoj su analizi korišteni akcelerogrami realnih zemljotresa. Određene su vrijednosti seizmičkih sila, momenata savijanja i normalnih sila u slučajevima kada bi došlo do sudara zgrada, kao i potrebna širina dilatacijskih razdjelnica da bi se izbjegao sudar, a izvedeni su i zaključci o utjecaju pojedinih parametara na pojavu sudara.In the cases when expansion joints between adjacent buildings are not sufficient, certain parts of the structure collide during earthquake. Then it comes to local damage or even destruction of parts of the building because of the impact forces of great intensity. In order to avoid collision, particular attention has to be paid to design of aseismic joints. In the paper, a parametric analysis of the potential collision of two multi-storey buildings is carried out by the use of software package SAP2000v15, with the goal to examine what occurs if the expansion joints have been designed in compliance with Serbian standards, and if yet there are collisions in some cases. The flexible base model in interaction with soil was designed. The accelerograms of real earthquakes were applied in dynamic analysis. Quantities of seismic forces, bending moments and axial forces in the case of collision, as well as necessary width of expansion joints to avoid it, were computed. Conclusions about influence of considered parameters on collision occurrence were accomplished