Bearing capacity of ring footing resting on rock mass under different loading positions

被引：0

作者：

Surya Dev Prasad ^{[1
]}

Manash Chakraborty ^{[1
]}

机构：

[1] Indian Institute of Technology (BHU),Civil Engineering Department

来源：

Sādhanā | / 50卷 / 2期

关键词：

Bearing capacity; Loading positions; GHB yield criterion; Ring footing; Rock mass;

D O I：

10.1007/s12046-025-02757-3

中图分类号：

学科分类号：

摘要：

Ring footings are cost-effective substructures for transmitting heavy loads to the underlying ground. This paper aims to investigate the effect of loading positions on the behavior of ring footing resting over the rock medium. The rock is assumed to be perfectly plastic and governed by the three-dimensional Generalized Hoek-Brown (GHB) yield criterion, and associative flow rule. After appropriately smoothening the GHB surface in the π- and the meridian planes, the ultimate bearing capacity is evaluated by performing numerical lower bound limit analysis in association with finite elements and interior-point-method-based non-linear optimization. The design charts are prepared for different load configurations corresponding to varying rock strength, ring sizes, and surcharge pressure. It is found that the bearing capacity factor gets highly influenced by the loading position. The ring footings are preferable when the loading is being placed either over the mid-portion or outer portion of the annular section; nevertheless, inner half loadings yield the maximum bearing capacity irrespective of any concerned factors. A proper validation has been done with the results reported in the previous literature. Failure patterns are drawn for a few cases.

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