On the limitations of decoupled approach for the seismic behaviour evaluation of shallow multi-propped underground structures embedded in granular soils

Zucca, Marco; Valente, Marco

doi:10.1016/j.engstruct.2020.110497

Cited by 42 publications

(26 citation statements)

References 22 publications

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“…For stability analyses, the elastic-perfectly plastic, Mohr-Coulomb soil model, and 15 node-triangular elements were utilized in this modeling. The boundary condition was set to have Standard fixities at the sides of the slope [18]. The FS was evaluated according to the phi-C reduction analysis.…”

Section: Finite Element Modelingmentioning

confidence: 99%

Numerical Investigation of Slope Stabilization Using Recycled Plastic Pins in Yazoo Clay

2021

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Geographically, at the center of Mississippi is a concentration of High Plastic Yazoo Clay Soil (HPYCS). Shallow landslides frequently occur in embankments constructed with HPYCS caused by rainfall-induced saturation of the embankment slope. The traditional methods are becoming expensive to repair the shallow slope failure. The use of Recycled Plastic Pins (RPPs) to stabilize shallow slope failures offers a significant cost and construction benefit and can be a useful remedial measure for these types of failures. The current study investigates the effectiveness of RPP in slopes constructed with HPYCS, using the Finite Element Method (FEM). The FEM analysis was conducted with the PLAXIS 2D software package. Three uniform and varied RPP spacings were investigated to reinforce 2–4H:1V slopes. Reinforced slope stability analyses were performed to investigate the applicability of RPP in HPYCS. The FEM analysis results indicated that RPP provides shear resistance for the sloping embankment constructed of HPYCS. Uniform spacing of RPP provides sufficient resistance that increases the Factor of Safety (FS) to 1.68 in 2H:1V slopes with deformation of RPP less than 15 mm. The uniform spacing and varied spacing combination of RPP increase the FS to 2.0 with the deformation of RPP less 7 mm.

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Section: Finite Element Modelingmentioning

confidence: 99%

Numerical Investigation of Slope Stabilization Using Recycled Plastic Pins in Yazoo Clay

2021

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“…A commercial package, TNO DIANA, was used [54]. The specimen was discretised with 4403 nodes and 4187 four-node quadrilateral shell elements (Figure 7a), considering the recent studies of RC structures [55]. The model was composed of glass blocks, laminated glass, PMMA plates and RC walls.…”

Section: Numerical Simulation 41 Description Of the Numerical Modelmentioning

confidence: 99%

Safety Evaluation of a RC Structure with Multiple Openings under High Water Depth Inundations

Endo

2021

Applied Sciences

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Experimental and numerical studies were conducted to examine the resistance of a newly developed residential building to inundations. Natural disasters including inundations have occurred frequently in recent decades. Once inundations submerge urban areas, water may remain there for days. This can cause substantial economic and social costs. Flood hazards have been widely discussed and investigated. However, sufficient research contributions have not been made on the behaviour of individual buildings under inundations. The objective of the research was to develop a prototype residential building in which residents can stay during inundations without the need of evacuation. A 3-m water depth was the target for safety evaluation in this research. This paper dealt with three tasks. First, three-point bending tests were performed on window components. Second, a hydrostatic pressure test was carried out on a full-scale reinforced concrete (RC) specimen. Third, taking advantage of the preceding two tasks, numerical simulations were performed to examine the behaviour of the prototype building under hydrostatic and hydrodynamic pressures. The experiments and numerical analyses showed that the prototype building had sufficient resistance and waterproofness against the inundations of a 3-m water depth. This research contributed to the improvements of the safety of RC structures against inundations and flood-risk reduction in urban areas.

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“…The features of the seismic inputs are shown in Table 3. The seismic inputs have been selected in order to obtain Magnitude between 6 and 6.9 and a PGA value between 0.35 g and 0.53 g: however, they are characterized by different integral parameters values, gaining a large variability of the ground motion characteristics , [19,20].…”

Section: Seismic Actionsmentioning

confidence: 99%

Seismic Response of Seven Existing Reinforced Concrete Chimneys Equipped With Tuned Mass Dampers Under Five Strong Seismic Events

Crespi¹,

Longarini²,

Valente³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The seismic response of seven existing reinforced concrete chimneys equipped with optimized Tuned Mass Dampers (TMDs) are investigated under five acceleration time histories recorded during different important European seismic events. For each chimney, the features of the TMDs are detected by nonlinear dynamic analyses, starting from the investigation about the optimum mass ratio (between the optimum mass of the TMD and the mass of the chimney without the TMD involved in the most representative vibrational modes). By the application of sinusoidal forces, the contribute of the TMDs are evaluated by the estimation of the equivalent damping ratio.

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On the limitations of decoupled approach for the seismic behaviour evaluation of shallow multi-propped underground structures embedded in granular soils

Cited by 42 publications

References 22 publications

Numerical Investigation of Slope Stabilization Using Recycled Plastic Pins in Yazoo Clay

Numerical Investigation of Slope Stabilization Using Recycled Plastic Pins in Yazoo Clay

Safety Evaluation of a RC Structure with Multiple Openings under High Water Depth Inundations

Seismic Response of Seven Existing Reinforced Concrete Chimneys Equipped With Tuned Mass Dampers Under Five Strong Seismic Events

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