CALCULATION OF TUNNEL LININGS UNDER SEISMIC LOADS OF THE EARTHQUAKES BY GENERATED THE ARTIFICIAL ACCELERATION APPLIED IN THE HA NOI AREA

Dynamic analysis of the tunnel affected by earthquakes requires the input are accelerations suitable for seismic conditions in the survey area. Hanoi city is the area where many tunnels are being built, but earthquakes in the past were not recorded, so the data of supply problems is limited. It is necessary to use artificial acceleration. One of the most widely used methods of creating artificial ground acceleration is the method of directly correcting available acceleration records according to spectral matching conditions. Base on this approach, the authors built PG01 program on Matlab language to generate the artificial acceleration. In this paper, the program PG01 will be used to create artificial ground acceleration which matching the response spectrum in Ba Dinh district, Hanoi city according to National Standard of Vietnam TCVN 9386-2012 with 3 different records. Take the obtained ground acceleration as input in to practice calculations the typical tunnel structure of the project Metro line No.3 (Nhon - Hanoi Station) using Plaxis2D program.