2D ANALYSIS OF UNDERGROUND STRUCTURE OF MRT (MASS RAPID TRANSIT) JAKARTA AT SECTION A-A, SENAYAN STATION

SHALITA NURMAHARANI SHAFIRA, Ali Awaludin, ST., M.Eng., Ph.D.

2018 | Skripsi | S1 TEKNIK SIPIL

Problems related to the severe increasing of transportation density in Jakarta demanded the government to immediately provide a solution. A development of a fast, safe and cheap mass transportation became the breakthrough of the problem, which is called Mass Rapid Transit (MRT), consisted of elevated and underground track. Underground structure of MRT consisted of tunnel and station box to be reviewed in this study. This research was conducted to find out structural behavior by analysing with the help of SAP2000 software. The research was done by collecting data from contractor then continued with non-seismic and seismic strutural modeling, loads calculation, boundary conditions determination, and analysis. Regulations used are SNI 1727:2013 for non-seimic condition and DSR-SC for seismic conditions. Reinforcement design used Microsoft Excel with SNI 2847:2013 regulation. Final result of this study showed that soil and groundwater conditions around and depth of structure are very influental to structure loadings and seismic behaviors received. The effect of seismic forces also give an impact even though the results shown of inner forces are smaller compared to non-seismic. The influence of loads working especially from outside of the structure also need to be reviewed, as it will greatly affect inner forces that will arise in underground structure. From analysis result, a design of reinforcement needed for roof slab structure are D32-150 for tension rebar, and D16-150 for shear rebar.

Problems related to the severe increasing of transportation density in Jakarta demanded the government to immediately provide a solution. A development of a fast, safe and cheap mass transportation became the breakthrough of the problem, which is called Mass Rapid Transit (MRT), consisted of elevated and underground track. Underground structure of MRT consisted of tunnel and station box to be reviewed in this study. This research was conducted to find out structural behavior by analysing with the help of SAP2000 software. The research was done by collecting data from contractor then continued with non-seismic and seismic strutural modeling, loads calculation, boundary conditions determination, and analysis. Regulations used are SNI 1727:2013 for non-seimic condition and DSR-SC for seismic conditions. Reinforcement design used Microsoft Excel with SNI 2847:2013 regulation. Final result of this study showed that soil and groundwater conditions around and depth of structure are very influental to structure loadings and seismic behaviors received. The effect of seismic forces also give an impact even though the results shown of inner forces are smaller compared to non-seismic. The influence of loads working especially from outside of the structure also need to be reviewed, as it will greatly affect inner forces that will arise in underground structure. From analysis result, a design of reinforcement needed for roof slab structure are D32-150 for tension rebar, and D16-150 for shear rebar.

Kata Kunci : MRT, SNI, DSR-SC, underground station, joint spring