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Analysis Study for Building Failure Envelopes of Strip Skirted Foundations on Undrained Soil
Abstract-Skirted foundation is a raft foundation reinforced by a number of vertical plates or "skirts" beneath. A series of two-dimensional finite element analyses were carried out using finite element software Abaqus. In the first stage the vertical bearing capacity of strip skirted foundations for uniform strength clay has been studied and the uniaxial vertical bearing capacity factors Ncv were calculated as a function of embedment ratio d/B. Then General combined VHM loading has been studied by building failure envelopes as slices in HM planes through the three- dimensional failure envelope at intervals of constant vertical load. The effect of foundation embedment ratio d/B, and the level of vertical load on the size and shape of the failure envelope has been also studied for rough soil-skirt interface, and Then the results were compared with previous studies. Results showed the role of the skirt in increasing the uniaxial and combined bearing capacity, and that the shape of the failure envelope significantly varies with foundation embedment ratio. Increasing obliqueness and asymmetry about the moment axis of the failure is associated with increasing embedment ratio, also the size of the failure envelopes is dependent on the embedment ratio and the level of vertical load, where the combined capacity diminishes with a decrease in the embedment ratio and an increase in the vertical load
Analysis Study for Building Failure Envelopes of Strip Skirted Foundations on Undrained Soil
Abstract-Skirted foundation is a raft foundation reinforced by a number of vertical plates or "skirts" beneath. A series of two-dimensional finite element analyses were carried out using finite element software Abaqus. In the first stage the vertical bearing capacity of strip skirted foundations for uniform strength clay has been studied and the uniaxial vertical bearing capacity factors Ncv were calculated as a function of embedment ratio d/B. Then General combined VHM loading has been studied by building failure envelopes as slices in HM planes through the three- dimensional failure envelope at intervals of constant vertical load. The effect of foundation embedment ratio d/B, and the level of vertical load on the size and shape of the failure envelope has been also studied for rough soil-skirt interface, and Then the results were compared with previous studies. Results showed the role of the skirt in increasing the uniaxial and combined bearing capacity, and that the shape of the failure envelope significantly varies with foundation embedment ratio. Increasing obliqueness and asymmetry about the moment axis of the failure is associated with increasing embedment ratio, also the size of the failure envelopes is dependent on the embedment ratio and the level of vertical load, where the combined capacity diminishes with a decrease in the embedment ratio and an increase in the vertical load
Analysis Study for Building Failure Envelopes of Strip Skirted Foundations on Undrained Soil
Alfawaz, Jenan (author) / Gabal, Gamil (author) / SUST
2021-04-27
Journal of Engineering and Computer Science (JECS); Vol 22, No 2 (2021); 22-31 ; 1858-6791 ; 1858-6783
Article (Journal)
Electronic Resource
English
DDC:
690
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