水泥混凝土路面传力杆布设方式仿真模拟  

Simulation study on dowel bar layout mode of cement concrete pavement

作　　者：张驰[1] 王雪[1] 崔卜心[1] 王迪[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2014年第4期25-30,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：教育部博士点基金新教师项目(20120205120013);陕西省自然科学基金项目(2012JQ7001);长江学者和创新团队发展计划资助(IRT1050);中央高校基本科研业务费专项资金项目(2013G2211005;CHD2011JC048)

摘　　要：为优化水泥混凝土路面传力杆布设间距设计,以有限元理论为基础,依据中国水泥混凝土路面设计规范设置模型参数,建立了文克勒地基上考虑不利荷载作用时的单层面板3D有限元模型。基于模型得到2种传力杆布设方式情况下面板的力学响应值,计算出等间距时接缝传荷系数（LTE）对间距的关系式、LTE和板最大位移,并分析轮迹集中布设传力杆的作用效果。研究结果表明：等间距布设传力杆时,在LTE与传力杆间距计算模型下,间距在450~1 800mm之间变化时,LTE变化小;轮迹集中布设传力杆将LTE平均提高3.015%,且传力杆根数越少提高值越大;LTE相等时,轮迹集中可将每条接缝处传力杆根数平均减小1根,与均布相比,即使减少1根传力杆时仍对板位移产生有利影响,且具有良好的经济效益。To optimize dowel bar spacing design in cement concrete pavement, a single-layer structure model on Winkler subgrade with consideration of unfavorable load was established based on finite element theory. The model parameters were set according to the pavement design specifications in our country. The panel＇s mechanical responses under different dowel setting conditions were got based on the model. The relationship of LTE and spacing, LTE and panel maximum displacement were calculated and the effects of wheel track concentrated dowel layout were analyzed. The results show that when dowels are equally displaced, under the calculation model of LTE versus spacing, LTE changes slightly when spacing varies between 450mm to 1800mm~ the wheel track concentrated dowel about can improve the LTE value by 3. 015~ on av- erage, and the improvement value grows with the decrease of dowel bar number; when the LTE values equal, the wheel track concentrated dowel layout can reduce the number of dowels by 1 on average, and compared with the equal dowel layout, even one dowel reduction still has a favorable impact on the panel displacement, and there is good economic benefit. 6 tabs, 3 figs, 15 refs.

关 键 词：道路工程 水泥混凝土面层 接缝 传力杆 传荷效率 

分 类 号：U416.216[交通运输工程—道路与铁道工程]