装配式型钢基础抗压抗拔承载力的试验及计算

›› 2009, Vol. 30 ›› Issue (7): 2096-2100.

装配式型钢基础抗压抗拔承载力的试验及计算

张大长¹，蒋刚¹，林致添²，安增军²

1.南京工业大学土木工程学院，南京 210009；2.江苏省电力设计院，南京 210024

收稿日期:2008-09-16 出版日期:2009-07-10 发布日期:2011-03-10
作者简介:张大长，男，1971年生，副教授，博士，从事结构工程及土-结构相互作用方面的研究工作。

Experimental studies and calculating method for compression and uplift capacities of fabricated steel foundation

ZHANG Da-chang¹, JIANG Gang¹, LIN Zhi-tian², AN Zeng-jun²

ZHANG Da-chang1, JIANG Gang1, LIN Zhi-tian2, AN Zeng-jun2

Received:2008-09-16 Online:2009-07-10 Published:2011-03-10

摘要/Abstract

摘要：

通过在两个不同基础底面尺寸的装配式型钢基础进行抗压、抗拔承载力和变形特性试验研究，考察了型钢基础及土体的变形及破坏型式，试验中该类基础发生土体剪切破坏而失效，最后提出了基于试验研究的抗压、抗拔承载力计算理论，其中抗压承载力根据有效底面积计算；抗拔承载力应考虑基础上拔产生应力扩散形成的破坏土体进行计算；计算中建议按土体的内摩擦角取用不同土体的上拔扩散角；地下水位以下土体上拔扩散角建议取为0 º。研究成果为该类基础的承载力计算理论、设计方法及实际工程应用提供理论依据。

关键词: 装配式金属基础, 抗压抗拔承载力, 试验, 变形, 破坏特性

Abstract:

The tests on compression and uplift capacities of two fabricated steel foundations with different base sizes are carried out; and these load-deformations are investigated. Based on the strain-developing of steel and the observation on failure behavior of steel foundation and soil, the deformation and failure behavior of the fabricated steel foundation are investigated; and the shear failures of soil have appeared for the two foundations. Lastly, the calculating theory of compression and uplift capacity is proposed, in which the effective bottom area of foundation is used for calculating compression capacity and the soil inside spread angle is considered for calculating uplift capacity. Besides, it is proposed that the internal friction angles of different soils can be adopted as its spread angle; however, the spread angle under groundwater can be regarded 0 º. This research provides the important data for the theory of capacity calculating, designing method and engineering applications of this kind of foundations.

Key words: fabricated steel foundation, experiment, compression or uplift capacities, deformation, failure behavior

中图分类号:

TU 473.1

张大长，蒋刚，林致添，安增军. 装配式型钢基础抗压抗拔承载力的试验及计算[J]. , 2009, 30(7): 2096-2100.

ZHANG Da-chang, JIANG Gang, LIN Zhi-tian, AN Zeng-jun. Experimental studies and calculating method for compression and uplift capacities of fabricated steel foundation[J]. , 2009, 30(7): 2096-2100.

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