Abstract:

Statistically balanced shells can lose their stability under the influence of dynamic forces. This study has studied the effects of earthquakes with different magnitude values, likely to be, on the stability of the shell. Based on the Simplified Bishop Dilim Method for determining the safety number of sheep during earthquakes, a computer software in the Fortran language has been developed. The earthquake effect in this software has been added to the stability analysis, taking into account the additional horizontal earthquake forces occurring on the shell, the increases occurring in the water pressure and the reductions occurring in terms of the sliding strength of the ground. For the purpose of determining the impact of the geometry and ground characteristics on stability during the earthquakes, using the prepared computer software, 2 different shell cuts and 2 different soil types were tested and the results were evaluated. The results of the analysis have found low safety numbers in high-magnitude earthquakes, especially near the Shevin Fay line. In the same dynamic conditions, the additional empty water pressure increases that occurred due to repeated sliding tensions on the cohesive floor were much higher than on the other floor and there were smaller safety numbers. In addition to the effects of the earthquake as well as the increase in the height of the shell and the presence of underground water within the ground has also significantly reduced the stability of the shell.

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