Abstract：According to the guidelines for seismic design of highway bridges(JTG/T B0201—2008), the elastic buffer materials should be set on the bridges to ease the impact of earthquake effect and limit displacement of beam. The elastic cushioning device in 30 meters simply supported bridges was quantitatively and qualitatively investigated. According to model calculation, reasonable rigidity value of elastic buffer material in 30 meters simply supported bridge was determined for different earthquake region and seismic intensity. The results show that the ratio of cushioning device rigidity to girder is from 0.01 and 0.50, and the efficient seismic performance can be realized for various bridges. The cellular cushioning rubber device was designed, and based on the experimental results under cyclic loading, the appropriate quantity of device in 30 meters simply supported bridges was suggested for different earthquake intensity in different area. The seismic performance was also verified through calculation.
2017, Vol. 38 
