Response of Single and Multilayered Flexible Base for Static and Earthquake Loading Under Framed RC Structure

Dhadse, Gaurav D.; Ramtekkar, Gangadhar; Bhatt, Govardhan

doi:10.1007/978-981-15-5235-9_13

Cited by 2 publications

(2 citation statements)

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“…3). The selection of element is helpful in getting high-stress concentration near footing [19,33]. Also, it is reported that the element is compatible with various soil constitutive models.…”

Section: Fig 2 Two Noded Isoparametric Beam Bending Elementmentioning

confidence: 97%

Influence due to interface in finite element modeling of soil-structure interaction system: a study considering modified interface element

Dhadse¹,

Ramtekkar²,

Bhatt³

2021

Res. Eng. Struct. Mater.

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The finite element (FE) modeling of interface in Soil-Structure Interaction (SSI) problem is most important aspect from early days of modeling i.e. during 1960. The overall performance of the structure is completely influenced due to behavior of interface. Such as realistic interface modeling of SSI system subjected to lateral loads leads to appropriate evaluation of lateral sway and base shear stress. During recent times, many modifications have been done in interface modeling such as incorporation of slip and bonding effects. Also the interface joining variable degrees of freedom system (interface for solid to skeletal contact) has come into existence. Still the de-bonding behavior, interface nonlinearity as well as modification in solid to skeletal contact has been unexplored in literatures. Hence there is necessity to develop a FE-SSI model and to study the influence of interface in SSI system considering unexplored features. In this paper, an attempt has been made to show the influence due to interface (including de-bonding and non-linearity) in FE modeling of SSI system using modified 5 noded zero thickness interface element. The performance of modified interface element is a novel contribution in present paper. The present study is limited to static loading conditions only. The effect of interface has been studied by determining bending moment, lateral sway, base shear stress and footing settlement in structure. The inclusion of modified interface has improved the performance of structure by reducing the base shear stress and allowing the sway. Also the true redistribution of bending moment has been observed after considering the modified interface.

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Section: Fig 2 Two Noded Isoparametric Beam Bending Elementmentioning

confidence: 97%

Influence due to interface in finite element modeling of soil-structure interaction system: a study considering modified interface element

Dhadse¹,

Ramtekkar²,

Bhatt³

2021

Res. Eng. Struct. Mater.

Self Cite

View full text Add to dashboard Cite

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“…It is worth to mention that many researchers showcased the computational difficulties that occur in zero thickness interfaces [2,4,18,[20][21][22][23]. In contrast, the recent software are using zero thickness interfaces for SSI problems by adopting only interface reduction factor with a high value of normal stiffness [24][25][26][27][28][29]. Such analysis is based on certain assumptions or approximations which have considered the interface performance by selecting only interface reduction factor, which may not be suitable for every soil and footing/structure condition.…”

Section: Introductionmentioning

confidence: 99%

Thin layer interface: An alternative modeling consideration in soil-structure interaction system

Dhadse,

Ramtekkar,

Bhatt

2024

Res. Eng. Struct. Mat.

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The numerical modeling of a soil-structure interaction (SSI) system subjected to lateral loads depends mainly upon the interface behavior. The soil stiffness in relation to the structure is quite low, and the structure generally has a rough surface in contact with the soil. As a result of the slipping and rolling of soil grains caused by friction, a thin layer of shear zone forms in soil with the application of lateral loads. A thin layer interface is represented by the shear zone. As a result, the decision on the thickness requirement is critical for appropriate modeling of the thin layer interface, which is rarely documented by researchers. Furthermore, it has been reviewed in the literature that modeling the SSI system with a thin layer interface more accurately replicates the physical system than modeling it with a zero-thickness interface. The methodology for effective usage (in terms of proper interface thickness) of the thin-layer interface in SSI system using finite element (FE) modeling is proposed in this work. The thickness of the interface has also been determined via numerical modeling of a large direct shear test (DST).

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Response of Single and Multilayered Flexible Base for Static and Earthquake Loading Under Framed RC Structure

Cited by 2 publications

References 1 publication

Influence due to interface in finite element modeling of soil-structure interaction system: a study considering modified interface element

Influence due to interface in finite element modeling of soil-structure interaction system: a study considering modified interface element

Thin layer interface: An alternative modeling consideration in soil-structure interaction system

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