Study on Mechanical Properties of a Negative Poisson's Ratio Structural Bridge Block

This paper is based on the design concept of the block is not damaged under small earthquakes and can be used sustainably and in the medium earthquake does not fall, convenient structure replacement and it can be destroyed during a large earthquake, sacrificing itself to protect the main beam. Based on the characteristics of graded energy dissipation and the advantages of negative Poisson's ratio compared with traditional structures in energy absorption and impact resistance, an anti-seismic energy dissipation bridge block was designed. The mechanical properties of the block were studied by uniaxial loading test and finite element simulation. Through the comparative analysis of normalized curves, it is found that the block structure has a good limiting ability compared with other types of blocks, which can be multi-enhanced stiffness characteristics and excellent bearing capacity.