GEOMECHANICAL ANALYSIS OF A RC RETAINING WALL CONSIDERING SEISMIC ACTIONS

Pri projektiranju podpornih zidov v praksi le redkokdaj izvajamo detajlno analizo potresnih vplivovče že, se poslužujemo konservativnih poenostavitev. V pričujočem diplomskem delu je predstavljen celostni pristop geotehnične analize AB podpornega zidu. Najprej je obdelana stabilnost pod statičnimi pogoji v skladu z EN 1997-1, nato pa sta primerjani dve metodi analize seizmičnih vplivovpsevdo-statična, kot jo priporoča EN 1998-5 ter dinamična, kot sta jo predlagala Chowdhury in Dasgupta (2009b). Slednja je obravnavana v dveh delihnajprej pod predpostavko, da je zid togo vpet v tla, nato pa še z upoštevanjem dinamične interakcije objekt-zemljina (Chowdhury, 2011). Primerjava rezultatov obeh seizmičnih analiz na izbranem primeru je pokazala podobne vrednosti notranjih statičnih količin pridobljenih s psevdo-statično ter prvim delom dinamične metode, medtem ko vrednosti dobljene z drugim delom dinamične metode nekoliko odstopajo in so se izkazale kot maksimalne.A detailed analysis of seismic effects is rarely carried out while designing retaining walls and if so, conservative simplifications are used. In the following thesis a complete approach to geotechnical analysis of a RC retaining wall is presented. Firstly the stability under static conditions in accordance with EN 1997-1 is considered, followed by a comparison of two distinct methods of seismic analysis, namely the pseudo-static analysis, as recommended by EN 1998-5 and a dynamic analysis as proposed by Chowdhury and Dasgupta (2009b). The later is dealt with in two partsin the beginning it is assumed the wall is fixed in the ground and in the second part the dynamic soil-structure interaction is considered (Chowdhury, 2011). Result comparison on a worked example has shown similar values of shear and moments obtained with the pseudo-static and the first part of the dynamic analysis, while the values obtained with the second part of the dynamic analysis slightly differ and represent the maximum values