EFFECTS OF CREEP AND SHRINKAGE ON HIGH-RISE BUILDINGS BEHAVIOR DUE TO EARTHQUAKE
Building design applies various types of loads, one of them is earthquake load that is applied according to the acceleration of seismic ground motion and have risks occurs in the building area with a probability of exceeding 2% in 50 years so building maintenance during that time is needed to keep t...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/71989 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Building design applies various types of loads, one of them is earthquake load that is applied according to the acceleration of seismic ground motion and have risks occurs in the building area with a probability of exceeding 2% in 50 years so building maintenance during that time is needed to keep the building in a safe condition in accordance with the initial design plan and did not have deterioration material due to shrinkage and creep effects. Column shortening can produce additional beam moments if there are differences in vertical shortening between adjacent structural elements that can reduce the capacity of elements to withstand earthquakes. Evaluation of the behavior of building structures due to shrinkage and creep is carried out by taking into account the effects of construction stages using spectrum response analysis and nonlinear time history when the building is completed constructed and in subsequent years. The analysis results of the 30-storey building structure had a significant effect in the early years after the building was completed, shown in the moment, shear, and axial forces in the interior and exterior columns increase in the C20 model with hinge status <IO, while the beam and shear walls experienced an increase the largest in model C with IO-LS beam hinge status and 2nd yield on shear walls. The interior column internal forces increase is greater than the exterior column which results in a greater shortening of the interior column compared to the exterior column with a difference of 7.8 mm and the axial stress that occurs is greater in the interior column. Shear wall shortening is smaller than column shortening and the axial stress that occurs in the shear wall is smaller than column. The differential shortening of the vertical elements results in an additional beam moment 24.73% in the gravity case and 2.93% in the spectrum response case. This shows that the design needs considered the effects of shrinkage and creep in the seismic analysis of high-rise buildings. |
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