You can probably work with Opensees software and can develop your model and code within that software for earthquake effects on buildings on hills and landslides also..
I advice you to conduct a comprehensive litterature review on precedent research works on the topic. Then, you will obviously identified gaps for further works.
I strongly agree with Dr. A.A. Fondjo and Dr. Om Prakash Chhangani! An in-depth literature review is required to identify the research gap in your selected field. When the gap is identified, you can explore it enough and your research can contribute to solve it.