Bearing Capacity of Shallow Foundations

Chen, Wai‐Fah; McCarron, W.O.

doi:10.1007/978-1-4615-3928-5_4

Cited by 42 publications

(22 citation statements)

References 25 publications

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“…Several methods have been applied proposed by Terzaghi (1955), Meyerof (1963), Hansen (1970), Brinch-Hansen (1970), Vesic (1975) and Richards et al (1993). In almost all cases, the bell tower results comply with the code requirements, with values of the SI (ratio between capacity and demand) ranging between 2 and 4.5.…”

Section: Discussionmentioning

confidence: 95%

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The Giotto's Bell Tower at Firenze (Italy): foundation assessment

Coli¹,

Tanganelli²,

Baldi³

et al. 2021

JCHMSD

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PurposeThe paper is aimed at assessing the safety of the Giotto's Bell Tower, with special attention to its foundation system, i.e. the foundation works and soil. The tower, well known all over the world, has a squared plan, with sides of 14.45 m each, and a total height equal to 84.7 m. The structural response of the tower is assessed with reference to the gravitational load and to the expected seismic action, quantified according to the seismic hazard of the site and the foundation soil.Design/methodology/approachA simplified analysis has been performed to check the safety level of the tower to seismic actions. Special attention has been paid to quantify the horizontal actions representing the seismic loads. Such quantification, indeed, has been made both through the elastic spectrum of the tower and by performing a site response analysis on the foundation soil, represented as a one-dimensional stratification of soil layers, described on the basis of experimental investigations. After defining the loading actions, a simplified assessment of the foundation safety has been made by considering the action over foundation, the geotechnical data and the safety factor.FindingsThe findings of the paper concern the assessment of the safety of the tower's foundation system. A lot of experimental data on the foundation soil, provided by various geological investigations, have been provided and used for the assessment. Moreover, the mechanical properties of the materials used for the structure have been collected and shown in the paper.Originality/valueThe paper collects a lot of technical information regarding the Giotto's Bell Tower, both regarding its foundation soil and the constituting materials. On the basis of the collected information, a structural analysis has been made to assess the seismic safety of the tower, and the results of such assessment are provided and discussed.

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Section: Discussionmentioning

confidence: 95%

“…On the basis of the collected data, a simplified analysis of the existing foundation has been made according to several theories: Terzaghi (1955), Meyerof (1963), Hansen (1970), Brinch-Hansen (1970) and Vesic (1975), following the instructions provided by the law in force (NTC 2018, 2018).…”

Section: Foundation Analysismentioning

confidence: 99%

The Giotto's Bell Tower at Firenze (Italy): foundation assessment

Coli¹,

Tanganelli²,

Baldi³

et al. 2021

JCHMSD

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“…There are several theories to evaluate the bearing capacity of a shallow foundation. The models presented by Terzaghi [22], Meyerhof [23], and Vesic [24] are the most commonly used for evaluating the bearing capacity of cohesive soils. For the bearing capacity computation in cohesive soils, the φ = 0 condition is considered [4,25,26].…”

Section: Fs R =mentioning

confidence: 99%

“…Vesic's model is more comprehensive and detailed as compared to other bearing capacity models. Therefore, Vesic's bearing capacity equation [24] was used in this study, as given below…”

Section: Fs R =mentioning

confidence: 99%

“…ULS and SLS requirements were used as the design optimization constraints. Additionally, some practical restrictions were applied to the design variables as given in Equations ( 23) and (24). The conventional foundation design calculations begin with an initial assumption and then the factor of safety (FS) and settlement (δ) are calculated and compared with the required factor of safety (FS r ) and allowable settlement (δ r ).…”

Section: Cost-based Optimal Designmentioning

confidence: 99%

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Cost-Based Optimization of Isolated Footing in Cohesive Soils Using Generalized Reduced Gradient Method

et al. 2022

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This study presents a cost-based optimization model for the design of isolated foundations in cohesive soils. The optimization algorithm not only incorporates safety requirements in the form of ultimate limit state (ULS) and serviceability limit state (SLS) criteria but also deals with the economics simultaneously. In that regard, the generalized reduced gradient (GRG) method is used for the optimization purpose to achieve the least construction cost of an isolated foundation along with the integration of design parameters as optimization variables. The optimization technique is elaborated using a design example in silty clayey soil and the results of the optimized design are compared with those of the conventional design. The optimization model shows that the optimized design can reduce the construction cost by up to 44% as compared to the conventional design cost for the particular example. Moreover, a sensitivity analysis is also performed to evaluate the quantitative impact of cohesive soil properties, design load, and groundwater table on the construction cost. The results indicate that the construction cost majorly depends on the combined effect of four key parameters: Young’s modulus, recompression index, design load, and groundwater table.

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