EVALUASI KINERJA STRUKTUR PADA GEDUNG BERTINGKAT DENGAN ANALISIS PUSHOVER MENGGUNAKAN SOFTWARE ETABS ( STUDI KASUS : HOTEL DI WILAYAH KARANGANYAR )

Abstract

Indonesian islands lies on the encounter between 3 large plates in the world: Australian, Eurasian, and Pacific. Eurasian and Australian platesare overlapping in the off-shore western part of Sumatra Island, off-shore southern part of Javanese Island, and off-shore part of Nusa TenggaraIslands and turning to the north to southern part of Maluku waters. There is an encounter between Australian and Pacific plates around PapuaIsland. Meanwhile, the encounter between those three plates occurs around Sulawesi. That is why the islands around the encounter of 3 plates experienceearthquake frequently. Earthquake disaster results in building structure damage. During the earthquake, the structure is expected to haveability of receiving earthquake force at certain level without significant damage or when the structure of building should collapse, it can provide nonlinearbehavior to post-elastic condition so that the security of building against the earthquake and the residents' life safety will be more guaranteed.Seismic is an important to building structure as the part of concrete performance reevaluation procedure in dealing with the effect of earthquake disaster.The performance evaluation can be done using pushover nonlinear static analysis referring to ATC-40 & FEMA.Considering the backgroundabove, An Evaluation was conducted on the multistoried building structure performance with Pushover Analysis. This research aimed tofind out the performance of building by the mechanism of plastic joint establishment in column beam and the relationship between base shear andthe displacement in pushover curve and seismic demand curve. The method employed was a nonlinear pushover statistic analysis using ETABSprogram.The conclusion of research showed that the friction force of pushover evaluation was 3325.592 tons to x direction and 3832.873 to y direction,while the displacement value was 0.175 to x and 0.261 m to y. The displacement of building did not exceed the maximum displacement,so that the building was safe to disaster earthquake. The maximum total drift was 0.00340 to y and 0.00507 to y < 0.01. Thus, the buildingbelonged to Immediate Occupancy (IO) performance level.