PERILAKU SAMBUNGAN BALOK-KOLOM PRACETAK SISI DALAM BERDASARKAN METODE EKSPERIMENTAL DAN ANALISIS BEBAN DORONG

Alamsyah, Dr. -Ing. Ir. Andreas Triwiyono

2011 | Tesis | S2 Teknik Sipil

The construction of precast system has been long recognized and implemented in Indonesia because of several advantages. Precast system with bataton has the advantage in the global warming issue because it could reduce the use of formwork. Precast system in general has a weakness in its connection, therefore the connection should be designed to be properly transferring the load of the earthquake. The aim of this study was to determine the characteristics of precast bataton beam-column connection due to cyclic loading with a simulated earthquake load. Moreover, this research also followed by pushover analysis for seismic parameters R, μ and performance of structures on the performance point. Specimens were monolith (SBKM) and precast (SBKP) with the same reinforcement that is 3D13 for negative moment, 2D13 for positive moment,with the stirrup were 1.5P6-150 and 8D13 for column reinforcement with the stirrup were P8-150. The precast is using bataton for beam of 140x290 while the column is using bataton column of 290x290. The specimen were subjected to cyclic loading based on ACI T1.1-01 and followed by pushover analysis of overall structure using the parameters moments curvature from analysis of the specimen. Test results show that the maximum average of push-pull test of monolith is 26.45 kN, while for the precast was decreases 17.58%. Average stiffness of push-pull test of monolith at the time of yield is 0.52 kN/mm, while the stiffness precast is decline to 32.69%. Average ductility specimen of monolith (SBKM) is 4.38, while for precast (SBKP) was decreases 12.55%. The test result of ductility factor (μ) and modification respon factor (R) which are based on SNI 1726-2002 is 4.439 and 6.639 respectively for the monolith specimens as well as 3.825 and 4.7041 for the precast specimens. Pushover analysis results indicate that the target of life safety on monolith and precast structure can be achieved and the value of ductility factor (μ) and modification respon factor (R) pushover results obtained by 3.95 and 6.34 respectively. Crack patterns indicate the occurrences of flexural cracks in beams and some shear cracks in the columns of monolith specimens and precast. Spalling in the specimen of precast larger compared to the monolith. Overall, it can be concluded that the strength of the monolith specimen is higher than that of precast specimen, the difference is not significant.

Creep or soil movement as the interesting part of landslide, already happened since 1980's at south side of Talang Bawong Kalibawang Irrigation Channel km 15.9. Various researches have been conducted by using elasto-plastic model which can not accommodate the time dependent behaviour. The objective of this research is to study the creep behaviour using numerical model.Soil constitutive model that used are Mohr-Coulomb and soft soil creep that already available in Plaxis. Some engineering judgements are used to give good correspond to field strain data recorded. The behaviour of creeping slope is studied by concerning groundwater level, static loads, seismic and collapse condition of slope.The study result showed that creep depends on groundwater level and its fluctuation which the ground movement can reach about 0.192 mm/year at side of street. Due to the load increment, maximum creep at inspection road reach 0.08 mm/year. For one second period seismic force the slope able to creep until 37.28 mm/year although reduction form 0.395 mm/year up to 0.547 mm/year in three years after. In assumption failure will be happened after 1.05 m up to 1.56 m displacement, the slope failure can occurred about 6 month untill 12 month later. Towards failure in progress the creep increased up to 564.6 mm/year up to 2549.8 mm/year.

Kata Kunci : Analisis pushover, bataton, performance point, siklik.