摘要
为了从理论上进一步验证结构层模量梯度控制的必要性,以对受力影响最为显著的基面层模量比为切入点,选取层间不完全连续接触,利用壳牌路面设计软件Bisar 3.0全面计算基面层模量比变化时半刚性路面的力学响应,将模量比的影响定量化.结果表明:基面层模量比从1增大到3.5时,沥青层最大拉应变与结构最大弯拉应力均呈先减后增趋势,同时面层剪应力随之增大;基面层刚度差异过大导致上基层层底拉应力骤增;规范推荐基面层模量比1.5～3较合理,可保证路面受力均衡.
In order to further verify the necessity of modulus gradient-controlling of structural layers,the paper chose modulus ratio between base and surface affecting stress distribution of structure most obviously as entrance point,set interlayer binding condition as not fully continuous and then comprehensively calculated the mechanical responses of semi-rigid pavement with modulus ratio between base and surface changing by shell designing software Bisar3.0,so the effect of modulus ratio was quantified.The results showed that when modulus ratio between base and surface changed from 1to 3.5,maximum flexible strain of asphalt layer and maximum flexible stress of structure both showed the trend of first decreasing then increasing,at the same time shear stress of surface increased;great difference between base and surface made flexible stress on the bottom of up-base suddenly raise;modulus ratio between base and surface of 1.5 to 3 recommended by standard was reasonable to ensure the stress balance of pavement.
出处
《武汉理工大学学报（交通科学与工程版）》
2013年第3期589-592,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
陕西省交通厅科技项目资助(批准号:KY08-01)
关键词
道路工程
模量梯度
力学响应分析
半刚性路面
层间连续
highway engineering
modulus gradient
analysis of mechanical response
semi-rigid pavement
continuous interface
