干旱区生态环境知识资源中心(Arid): 沙漠区沥青混凝土路面横向隆起现象的力学分析

Arid

	沙漠区沥青混凝土路面横向隆起现象的力学分析
其他题名	Mechanical Analysis of Asphalt Concrete Pavement Transverse Blowup in Desert Area
	张宏; 张海龙; 王智远
来源期刊	公路交通科技
ISSN	1002-0268
出版年	2017
卷号	34 期号:7 页码:8-13
中文摘要	为了研究沙漠区半刚性基层沥青混凝土路面受赋存气候环境影响,由温度应力作用引起路面横向隆起的半刚性基层力学响应,采用弹性薄板理论与复合材料力学理论,依据病害成因将路面横向隆起病害实体抽象简化为由材料性能、厚度不同的两块各向同性单层板所构成的四边简支、承受路面结构层自重的整体式双层板结构,建立半刚性基层发生横向隆起病害的拱胀力学模型。分析了基层结构在路面结构层自重和纵向均布压力作用下的挠度微分方程,并推演了其失稳的临界荷载表达式。结合路面的实际情况,认为路面结构的临界荷载取为(N_x)_(cr) = 4pi~2D/b~2较为合理; 之后利用复合材料力学理论和弹性薄板理论分析并推导了整体式双层板的抗弯刚度表达式及中性轴位置的确定方法。结果表明: 在纵向均布压力N_x≥ (N_x)_(cr),基层结构将发生失稳破坏。
英文摘要	In order to study the mechanical response of the semi-rigid base of asphalt concrete pavement subjected to pavement transverse blowup caused by temperature stress under the influence of its occurrence climate environment in desert area,according to the disease cause,the disease entity of the transverse blowup is abstractly simplified as an integral double-layer plate structure with 4 edges simply supported,which is composed of 2 isotropic single-layer plates with different material properties and thicknesses and subjected to the gravity force of pavement structure,and a vaulted expansion mechanical model of the semi-rigid base which occurred transverse blowup phenomenon is established based on the theory of elastic thin plate theory and the theory of composite material mechanics. A deflection differential equation of base structure subjected to the gravity force of pavement structure and the longitudinal uniform pressure is analyzed,and a buckling critical load expression is derived. Combining with the actual situation of pavement,it is thought that the taking value of the critical load of pavement structure as (N_x)_(cr) = (4pi~2D)/(b~2) is more reasonable. After that,the expression of the flexural rigidity and the method of determining the position of the neutral axis for the integral double-layer plate are analysed and derived by utilizing the theory of composite material mechanics and the theory of elastic thin plate. The result shows that the base structure will occur buckling failure if the longitudinal uniform pressure N_x ≥ (N_x)_(cr).
中文关键词	道路工程 ; 横向隆起 ; 薄板理论 ; 临界荷载 ; 失稳破坏
英文关键词	road engineering critical load thin plate theory transverse blowup buckling failure
语种	中文
国家	中国
收录类别	CSCD
WOS类目	TRANSPORTATION
WOS研究方向	Transportation
CSCD记录号	CSCD:6027011
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236115
作者单位	内蒙古大学交通学院, 呼和浩特, 内蒙古 010070, 中国
推荐引用方式 GB/T 7714	张宏,张海龙,王智远. 沙漠区沥青混凝土路面横向隆起现象的力学分析[J],2017,34(7):8-13.
APA	张宏,张海龙,&王智远.(2017).沙漠区沥青混凝土路面横向隆起现象的力学分析.公路交通科技,34(7),8-13.
MLA	张宏,et al."沙漠区沥青混凝土路面横向隆起现象的力学分析".公路交通科技 34.7(2017):8-13.