摘要
为了揭示车辆荷载作用下城市低填路基结构的受力响应规律,基于弹性层状计算理论,采用BISAR计算程序对车辆荷载作用下低填路基各结构层的静力响应进行了计算分析,从而揭示了车辆荷载应力在结构层中的传递规律;并在此基础上,通过数值模拟对行驶车辆动荷载引起的各结构层的动力响应进行了分析。结果表明:路基结构层对车辆荷载应力的削减作用大于80%,随着基底换填土层模量和换填厚度的提高,路床顶位移呈非线性降低变化趋势,有利于改善上部路面的使用性能;超载80%、超速33%引起附加竖向应力增大约77.7%和42.9%,不利于城市低填路基工后沉降的控制。
In order to investigate the mechanical response of urban low embankment under traffic loads,based on elastic layer system theory,the static response of embankment structure layers under traffic loads is analyzed by using BISAR calculation program. The transmission rules of vehicle load in embankment structure layers are revealed.On the basis of which,the dynamic response of embankment structure layers is analyzed by numerical simulation.The results show that more than 80% of vertical stress is weakened by embankment structure layers. With the increase of the modulus and thickness of the replacement under embankment,the displacement of the top of roadbed is nonlinearly decreasing,which is helpful to improve the performance of upper pavement. But overloading of 80%and overspeed of 33% would increase the additional vertical stress by about 77.7% and 42.9%,which is not conducive to the control of post-construction settlement.
作者
杨玲
张帆
杨宾川
YANG Ling1,2, ZHANG Fan3, YANG Binchuan4(1. Zhenghou Municipal Engineering Management Office, Zhengzhou, He＇nan 450000, China ; 2. Zhengzhou Municipal Facilities Maintenance and Construetion Co. , Ltd , Zhengzhou , He＇nan 450000, China; 3. He＇ nan Vocational College of Information and Statistics, Zhengzhou, He＇ nan 450008, China ; 4. The Sixth Air Defense Agency of Air Force, Hengyang, Hunan 421001, Chin)
出处
《水利与建筑工程学报》
2018年第3期73-76,85,共5页
Journal of Water Resources and Architectural Engineering
基金
河南省高等学校重点科研项目(16A560009)
关键词
低填路基
行车荷载
动力分析
层状结构
数值模拟
low embankment
traffic load
dynamic analysis
layered structure
numerical simulation
