Abstract: A two-stage energy dissipation type shed tunnel support structure connected by a principle of Dougong and a design method thereof are provided. The two-stage energy dissipation type shed tunnel support structure includes a Dougong joint domain, crossbeams and columns. The Dougong joint domain includes section steel members, wavy-wall cylindrical elastoplastic buffers, U-shaped sliding connecting troughs and high-strength bolts. Multiple layers of the section steel members are orthogonally stacked to form a Dougong shape, the wavy-wall cylindrical elastoplastic buffers are arranged between adjacent layers of the section steel members, and the U-shaped sliding connecting troughs are arranged at upper and lower ends of the wavy-wall cylindrical elastoplastic buffers, which realizes a connection between the wavy-wall cylindrical elastoplastic buffers and a section steel in two orthogonal directions.

Abstract: A two-stage energy dissipation type shed tunnel support structure connected by a principle of Dougong and a design method thereof are provided. The two-stage energy dissipation type shed tunnel support structure includes a Dougong joint domain, crossbeams and columns. The Dougong joint domain includes section steel members, wavy-wall cylindrical elastoplastic buffers, U-shaped sliding connecting troughs and high-strength bolts. Multiple layers of the section steel members are orthogonally stacked to form a Dougong shape, the wavy-wall cylindrical elastoplastic buffers are arranged between adjacent layers of the section steel members, and the U-shaped sliding connecting troughs are arranged at upper and lower ends of the wavy-wall cylindrical elastoplastic buffers, which realizes a connection between the wavy-wall cylindrical elastoplastic buffers and a section steel in two orthogonal directions.

Abstract: An arbitrary-shaped fabricated test block for a high-steep slope rolling stone test includes a connecting square barrel and test block bodies. The connecting square barrel is formed by enclosing steel plates, the steel plates are provided with connecting grooves on a periphery of the steel plates, and the connecting grooves are provided with connecting groove bolt holes. The test block bodies are printed on printing bases by 3D printing technology, connecting plates are fixedly arranged on the printing bases, connecting plate bolt holes are formed in the connecting plates, and high-strength bolts penetrate through the connecting groove bolt holes and the connecting plate bolt holes to connect the test block bodies to the connecting square barrel. A sensor box is fixedly arranged on an inner side of the connecting square barrel, and a sensor is arranged in the sensor box.