Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas

doi:10.1155/2018/8145356

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas
	Ma, Tianzhong 1,2; Zhu, Yanpeng 1,2; Yang, Xiaohui 1,2; Ling, Yongqiang 1,2
刊名	MATHEMATICAL PROBLEMS IN ENGINEERING
	2018
卷号	2018
关键词	Bearing capacity Friction Loads (forces) Pile foundations Sediments Software testing
ISSN号	1024-123X
DOI	10.1155/2018/8145356
英文摘要	It is very necessary to research the bearing characteristics of composite pile group foundations with long and short piles under lateral load in loess areas, because these foundations are used widely. But few people researched this problem in loess areas up to now worldwide. In this paper, firstly, an indoor test model of a composite pile foundation with long and short piles is designed and then employed to explore the vertical load bearing characteristics and load transfer mechanisms of a single pile, a four-pile group, and a nine-pile group under different lateral loads. Secondly, ANSYS software is employed to analyze the load-bearing characteristics of the test model, and for comparison with the experimental results. The results demonstrate the following. (1) The lateral force versus pile head displacement curves of the pile foundation exhibit an obvious steep drop in section, which is a typical feature of piercing damage. A horizontal displacement limit of the pile foundation is 10 mm and 6 mm for the ones sensitive to horizontal displacement. (2) The axial force along a pile and frictional resistance do not coincide, due to significant variations and discontinuities in the collapsibility of loess; a pile body exhibits multiple neutral points. Therefore, composite pile groups including both long and short piles could potentially maximize the bearing capacity and reduce pile settlement. (3) The distribution of stress and strain along the pile length is mainly concentrated from the pile head to a depth of about 1/3 of the pile length. If the lateral load is too large, short piles undergo rotation about their longitudinal axis and long piles undergo flexural deformation. Therefore, the lateral bearing capacity mainly relies on the strength of the soil at the interface with the pile or the horizontal displacement of the pile head.
资助项目	National Science Foundation of China[51568042] ; Program for Changjiang Scholars and Innovative Research Team in University[IRT_17R51]
WOS研究方向	Engineering ; Mathematics
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000451129500001
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32872]
专题	土木工程学院
通讯作者	Yang, Xiaohui
作者单位	1.Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Western Engn Res Ctr Disaster Mitigat Civil Engn, Minist Educ, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Ma, Tianzhong,Zhu, Yanpeng,Yang, Xiaohui,et al. Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas[J]. MATHEMATICAL PROBLEMS IN ENGINEERING,2018,2018.
APA	Ma, Tianzhong,Zhu, Yanpeng,Yang, Xiaohui,&Ling, Yongqiang.(2018).Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas.MATHEMATICAL PROBLEMS IN ENGINEERING,2018.
MLA	Ma, Tianzhong,et al."Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas".MATHEMATICAL PROBLEMS IN ENGINEERING 2018(2018).