Time Effect of Buoyant Force Reduction for Underground Structures in Clays: Model Test and Case Study

Ren, Zhisheng; Ni, Pengpeng; Mei, Guoxiong

doi:10.1061/(asce)gm.1943-5622.0001823

Cited by 12 publications

(2 citation statements)

References 39 publications

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“…Due to the rising water table during the rainy season in southern regions [30,31], it is preliminarily judged that the significant buoyancy forces will likely occur at the base plate of the basement. Based on the literature sources [32][33][34][35], it is assumed that the groundwater level in this project example is 3 m below the standard horizontal level. The buoyancy force exerted on the bottom slab can be equivalent to the vertical upward concentrated force 127.44 kN loaded on all nodes located below the bottom slab.…”

Section: The Damage Indicator Of the Defined Cracking Bending Momentmentioning

confidence: 99%

Up-Floating Destruction and Reinforcement Measures of Damaged Basement Based on the Bending Moment and Deformation Analysis

Fan

et al. 2023

Buildings

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Based on the up-floating incident of the basement in a high-rise residential building, the finite element (FE) model of the up-floating destruction region is established to investigate the damage mechanism. The stress states and the deformations of the basement structure are obtained under complex loads including water buoyancy forces, vehicle loads and construction loads. To assess the extent of damage, a novel damage indicator is defined based on two levels: the cracking bending moments and the yield bending moment. The first-level cracking bending moment, second-level cracking bending moment and the yield bending moment can be determined using the section stratification method. By comparing the maximum bending moment of the component with its corresponding cracking moment, one can determine whether the cracks have occurred and assess their severity. Meanwhile, the antifloating failure model is constructed to analyze the mechanism of the up-floating destruction. Finally, a detailed reinforcement treatment plan of ‘decompression first and then reinforcement’ is presented to reinforce and repair the damaged basement structure. The mechanism analysis of the up-floating destruction and the comprehensive reinforcement treatments ensure the simulation of the life cycle of emergence, development and treatment to ensure structural safety.

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Section: The Damage Indicator Of the Defined Cracking Bending Momentmentioning

confidence: 99%

Up-Floating Destruction and Reinforcement Measures of Damaged Basement Based on the Bending Moment and Deformation Analysis

Fan

et al. 2023

Buildings

View full text Add to dashboard Cite

show abstract

“…The buoyancy of an underground structure in a weakly permeable or impermeable foundation is usually below the calculated value, however, which is referred to as “buoyancy reduction”. The extent of this reduction can be expressed as a buoyancy reduction coefficient [ [6] , [7] , [8] , [9] ]. Designers typically apply the highest anti-floating water level to determine the buoyancy load on an underground structure, thereby overestimating buoyancy resistance.…”

Section: Introductionmentioning

confidence: 99%

Buoyancy of underground structures and pore water pressure conduction law in silty clay strata

Guo,

Zhou,

Sun

et al. 2024

Heliyon

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Experimental and computational analysis of hydraulic behavior in shallow buried structures in sand

et al. 2023

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Time Effect of Buoyant Force Reduction for Underground Structures in Clays: Model Test and Case Study

Cited by 12 publications

References 39 publications

Up-Floating Destruction and Reinforcement Measures of Damaged Basement Based on the Bending Moment and Deformation Analysis

Up-Floating Destruction and Reinforcement Measures of Damaged Basement Based on the Bending Moment and Deformation Analysis

Buoyancy of underground structures and pore water pressure conduction law in silty clay strata

Experimental and computational analysis of hydraulic behavior in shallow buried structures in sand

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