THE EFFECT OF SOFT SOIL LAYER THICKNESS VARIATION DUE TO SEISMIC WAVE PROPAGATION FROM BEDROCK TO THE SURFACE IN SURABAYA
The accuration in predicting ground respons analysis on the surfaces of soil is required by all structural engineers to input seismic load for their calculation. Basically, the wave propagation occurs because of the energy released from the bedrock and spreading to all direction as a result of the m...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/76476 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The accuration in predicting ground respons analysis on the surfaces of soil is required by all structural engineers to input seismic load for their calculation. Basically, the wave propagation occurs because of the energy released from the bedrock and spreading to all direction as a result of the movement of the earth’s tectonic plates. The city of Surabaya, which is one of the second largest metropolitan cities in Indonesia that has numerous medium to high-rise buildings being built, needs to be focus on each detail of its planning process. In addition, the geological condition indicates the domination of alluvium layer with variation of soft soil’s thickness and is crossed by two active seismic faults cause the vulnerability of earthquake excitation is much greater.
This sudy aims to determine the response of seismic wave propragtion from bedrock to the surface through the variation of soft soil layers. The research subjects obtain from several bor-log NSPT that spread across in Surabaya. The analysis starts from identifying depth variation of bedrock, ground motion selection and modification at bedcrok, and finally the wave propagation to the surface (ground response anlysis) using 1-dimensional model analysis by DEEPSOIL and NERA.
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