摘要
以"界面脱黏"病害为切入点,建立连续式伸缩缝结构有限元模型,在对有限元计算结果进行可靠性论证的基础上,探讨荷载作用位置、伸缩缝铺装与桥面铺装材料的模量比、伸缩缝铺装厚度及宽度、界面摩擦系数、桥端转角对界面法向拉应力的影响。结果表明:不同工况下的界面法向拉应力计算结果均在伸缩缝材料的允许拉应力范围之内,且选择柔性更大、变形协调更好的伸缩缝材料,并选择较厚的伸缩缝铺装、宽度选择45-50 cm,并且将界面进行粗糙化处理可有效地改善应力状态以减缓甚至避免"界面脱黏"病害。在此基础上,得出连续式伸缩缝铺装参数设计方法,为实体工程的设计和施工提供了新思路。
Aiming at interface debonding disease, this study adopts finite element method to analyze the mechani- cal response of the expansion joint pavement. On the basis of expounding and proving the finite element calcula- tion results, the interface＇s normal tensile stress under the condition of the different load position, the interface con- tact state, the modulus ratio of expansion joint pavement and bridge pavement, the thickness and width of expan- sion joint pavement, bridge side angle are discussed. The results show that the finite element calculation results of the interface＇s normal tensile stress under different conditions are in the scope of the expansion joint gap filling material＇s allowable tension stress, and in order to improve the stress state effectively to slow down or even avoid the ＂interface debonding＂ diseases, it is necessary to choose appropriate, flexible and thicker expansion joint mate- rial with pavement width 45-50cm for achieving the interface roughness. It finds the parameter design method of the expansion joint pavement provides new thought for the real engineering design and construction.
出处
《华东交通大学学报》
2015年第3期42-49,共8页
Journal of East China Jiaotong University
基金
同济大学道路与交通工程教育部重点实验室开放基金项目(K201001)
上海自然科学基金项目(13ZR1441100)
关键词
道路工程
连续式伸缩缝
界面脱黏
有限元
材料与结构设计
road engineering
continuous expansion joint
interface debonding
finite element method
materialand structure design
