Seismic soil structure interaction analysis for asymmetrical buildings supported on piled raft for the 2015 Nepal earthquake

Badry, Pallavi; Satyam, Neelima

doi:10.1016/j.jseaes.2016.03.014

Cited by 41 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ANSYS 17.0 finite element software is used to numerically simulate the SPSI system because it can simulate complex problems that require large computational memory using a direct method of analysis. Multiple researchers [18,30,31] have used ANSYS to study SPSI problems. e simulation of the structural elements, soil model, and boundary condition are explained below.…”

Section: Ground Response Analysismentioning

confidence: 99%

“…e mesh is suitably refined near the soil-raft and soilrock interfaces and in the portion of soil around the piles. e formation of a gap along the soil-pile and soil-raft interfaces is excluded, and the system behavior is idealized as linear elastic, as suggested by other researchers [18,30,31]. e joints between the raft and pile are modeled with rigid contacts.…”

Section: Modeling Of the Soil-pile-structurementioning

confidence: 99%

“…A special system with asymmetric structure was used to investigate the topic of this paper, and asymmetric structure always needs asymmetric foundations. However, asymmetric buildings are more vulnerable to earthquake hazards than symmetric buildings [18]. Although previous studies have provided valuable contributions, further investigations are essential to fully understand the influence of optimized piled raft foundations with different pile diameters and spacing on the seismic performance of asymmetric buildings due to complex SPSI phenomena.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Variable Rigidity Design of Piled Raft Foundation on Seismic Performance of Buildings

Xie

Chi

Wang

2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

In order to reduce the costs and improve the overall performance of building systems, the static optimized design with variable rigidity of piled raft foundations has been widely used in recent years. Variable rigidity design of piled raft foundations that support midrise buildings in high-risk seismic zones can alter the dynamic characteristics of the soil-pile-structure system during an earthquake due to soil-pile-structure interaction. To investigate these aspects, a nuclear power plant sitting on multilayered soil is simulated numerically. e paper describes a numerical modeling technique for the simulation of complex seismic soil-pile-structure interaction phenomena. It was observed that the total shear force on top of the piles and the rocking of the raft are reduced after optimization, whereas the displacement of the superstructure is nearly unaffected. e findings of this study can help engineers select a correct pile arrangement when considering the seismic performance of a building sitting on soft soil.

show abstract

Section: Ground Response Analysismentioning

confidence: 99%

Section: Modeling Of the Soil-pile-structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Variable Rigidity Design of Piled Raft Foundation on Seismic Performance of Buildings

Xie

Chi

Wang

2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…Previous studies have been shown that underground structures are less vulnerable than above-surface structures [2]. For example, the Mexico-city underground tunnel [2][3][4][5] and the Los Angeles subway [2] during 1985 earthquake have suffered no damage. In several cases, excavations are carried out in heavily populated areas therefore, estimation of ground movement and provisioning of necessary measures to ensure safety and serviceability of nearby structures are of extreme importance before undertaking the excavation works [6].…”

Section: Introductionmentioning

confidence: 99%

Response Of Framed Building Models Near Underground Excavation Due To Artificial Excitation using Shake Table Test

Kumar*,

Mishra

2019

IJITEE

View full text Add to dashboard Cite

In urban areas where land is limited and buildings are closely spaced, deep excavations are necessary for the construction of surface and sub-surface facilities. Therefore, there is a concern that soil excavations resulting in a ditch or a trench adjacent to a building may adversely affect the response of nearby buildings when earthquakes occur. In this paper, the results of experimental study of building frame models in close proximity of excavations and subjected to artificial excitations are presented through a series of shake table tests. The study has been conducted to investigate the effects of the size and offset distances of excavations on the response of the building frame models founded on different types of foundation systems. It is observed that the width, depth and offset distance of the trench has a significant influence on the response of the building frame. It is seen that pile foundation with sufficient embedment depth produces less displacement at the top of the building as compared to other foundation systems.

show abstract

“…e behaviours of piled raft foundations recorded at the Paci c coast during the Tohoku earthquake [11] and the 2015 Nepal earthquake [12] are very rare case records. It was found that there was little change in the foundation settlement and the load sharing between the raft and the piles before and after the earthquake.…”

Section: Introductionmentioning

confidence: 99%

Horizontal Loading Tests on Disconnected Piled Rafts and a Simplified Method to Evaluate the Horizontal Bearing Capacity

Zhu

Fei

Wang

2018

Advances in Civil Engineering

View full text Add to dashboard Cite

Disconnected piled raft (DPR) foundations have been widely adopted as an effective foundation system where the piles are separated from the raft by a granular layer, which can limit the shear forces and moments transmitted between the raft and the piles. Thus, DPR foundations may avoid the problem of horizontal forces, such as those from an earthquake or dynamic loads, which damage the structural connection between the pile head and raft. A series of static horizontal loading tests were carried out on three types of foundation models, i.e., piled raft, disconnected piled raft, and raft alone models, on fine sand using a geotechnical model in a 1 g field. In this paper, the influences of vertical loading and interposed layer thickness were presented and discussed. The results showed that most of the horizontal force was carried by raft/interposed layer friction in the DPR foundation type, and the shear force and moment of the piles were greatly reduced due to the gap between the raft and the heads of the piles. The tested foundations were simulated using a simplified method with theoretical equations derived by making several approximations and assumptions. The simulated results agreed well with the test results.

show abstract

Seismic soil structure interaction analysis for asymmetrical buildings supported on piled raft for the 2015 Nepal earthquake

Cited by 41 publications

References 8 publications

Influence of Variable Rigidity Design of Piled Raft Foundation on Seismic Performance of Buildings

Influence of Variable Rigidity Design of Piled Raft Foundation on Seismic Performance of Buildings

Response Of Framed Building Models Near Underground Excavation Due To Artificial Excitation using Shake Table Test

Horizontal Loading Tests on Disconnected Piled Rafts and a Simplified Method to Evaluate the Horizontal Bearing Capacity

Contact Info

Product

Resources

About