蜂窝形缓冲装置在30m简支桥中的设置  

Setting of cellular cushioning device in 30 meters simply supported bridge

作　　者：贺拴海[1] 彭晶蓉[1] 宋一凡[1] 侯炜[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《江苏大学学报（自然科学版）》2017年第1期93-97,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：广东省交通运输厅科技项目(科技-2014-02-017)

摘　　要：针对JTG/T B02-01—2008《公路桥梁抗震设计细则》中对桥梁设置弹性垫块以达到地震时缓和冲击和限制梁位移的建议,对30 m简支梁桥中的缓冲装置进行了定性定量的研究.首先,通过模型计算,确定了在不同场地类型和不同地震烈度区的条件下,30 m简支梁桥中弹性垫块的合理刚度取值范围.计算结果表明:垫块刚度为主梁刚度的γ倍(0.01≤γ≤0.50)时,对各区桥梁均能达到理想的抗震保护效果;以计算结果为基础,采用常用工业橡胶材料,设计了一款蜂窝形缓冲装置,并通过往复压缩试验得到其力学性能;对不同场地类型和不同地震烈度区的30 m简支梁桥设置蜂窝形缓冲装置的合理个数提出了建议;通过计算,验证了蜂窝形缓冲装置抗震效果的有效性.According to the guidelines for seismic design of highway bridges（JTG/T B02-01—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.

关 键 词：简支梁桥 缓冲装置 有限元分析 地震烈度 抗震性能 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]