Test device and test method for simulating fault-seismic coupling dynamic response

The invention relates to the field of tunnel engineering earthquake dynamic response tests, in particular to a test device and a test method for simulating fault-earthquake coupling dynamic response, according to the scheme, a model box is divided into three parts in the horizontal direction, namely a first box body, a fault zone box body and a second box body in sequence, the first box body is used for simulating an upper wall, and the second box body is used for simulating a lower wall; the second box body is used for simulating a footwall, the fault zone box body is used for simulating a fault fracture zone between the footwall and the footwall, the number of the fault zone box bodies is at least one, all the box bodies are connected through clamping pieces, the number of fault fracture surfaces and the fault width are adjusted by screwing or loosening the clamping pieces, and fault-crossing multi-fracture-surface working condition simulation is achieved; when in use, the first box body and the second box