Geosynthetic-reinforced cushioned piles with controlled rocking for seismic safeguarding

Xu, Ruoshi; Fatahi, Behzad

doi:10.1680/jgein.18.00018

Cited by 23 publications

(4 citation statements)

References 62 publications

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“…The incorporation of reinforcement in the form of geosynthetic materials has increased the bearing capacity of the footing resting on a shallow foundation. With speci c geo-synthetic materials as geotextiles and geogrids, experimental research on various soil types was conducted [25][26][27][28][29][30][31][32]. The researchers' use of geotextiles as the soil reinforcing material that achieves maximum bearing capacity is crucial.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Seismic Analysis of RC framed Building Situated in High Risk Seismic Zone with Recyclable Scrap Tyre Mix for Base Isolation using Finite Element Modeling

Raj

2023

Preprint

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Sustainable construction is a key component of the current trend. For civil engineers to master the talent of creating sustainable buildings, recyclable materials must be used. These recyclable waste items from industrial uses must be converted into practical building materials. A number of by-products that are particularly harmful to our environment include scrap tyres as a major ingredient. Used and worn-out automobile tyres could be used in construction as a basic isolation element. These discarded tyres will be utilized as bearings or crumbles for seismic shock absorbers. This paper emphasis the performance of a three-storey RC framed building situated in Nepal with and without scrap tyre crumb mix as base isolation material. The applications of SAP 2000 software package is completely applied for the investigation which is very unique. For instance, the dynamic properties of the building with respect to fixed base (without soil-structure interaction effect is studied) such as base shear, acceleration, displacement and frequencies of the building were studied. Subsequently, the dynamic properties pertaining to the implementation of soil-structure interaction analysis, with and without soil-tyre mix is computed and eventually compared with that of the building without soil-structure interaction criteria. The elegance of this paper is that the analysis has been conducted for five different combinations of tyre crumbs such as 0%, 10%, 20%, 30% and 50%. Furthermore, the investigation has been evaluated for two categories of importance factors such as 1 and 1.2. Moreover, the analysis has been enhanced by further study pertaining to soil conditions such as hard, medium and soft soil as per IS code conditions. From the study it is observed that, 30% tyre crumb combination has superior reduction in base shear, acceleration and frequencies and, increased displacement in all phases of the investigation.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Seismic Analysis of RC framed Building Situated in High Risk Seismic Zone with Recyclable Scrap Tyre Mix for Base Isolation using Finite Element Modeling

Raj

2023

Preprint

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“…e reinforcement effect of geosynthetics on soft soil is mainly reflected in horizontal reinforcement. e reinforcement principle of geosynthetics reinforced cushion is as follows [31,32]:…”

Section: Introductionmentioning

confidence: 99%

Observed Performance of Highway Embankment over Soft Marine Clay: A Case Study in Wenzhou, China

Bian

Yan

Zhang

2020

Advances in Civil Engineering

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This paper presents a case history of observed performance of highway embankment over soft marine clay in Wenzhou, China. During the embankment construction, the changes of ground settlement, ground displacement, and lateral displacement of subsoil with the construction time were monitored and analyzed. The monitoring results indicate that the ground settlement and lateral displacement of subsoil account for about 75% in the process of embankment construction. The measured maximum values of ground settlement, ground displacement, and lateral displacement of subsoil are 37.88 mm, 21.50 mm, and 23.56 mm, respectively. After the completion of the embankment construction, the settlement gradually tended to be stable. It is suggested that the monitoring data of settlement and displacement of embankment are smaller than the design requirements, and the embankment stability is also ensured.

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“…Rocking isolation can be utilized in the design of bridges as an effective base isolation mechanism to improve the structures seismic performance [2], [3]. This not only reduces the seismic demand on the structure, but also significantly reduces the damage caused by inelastic behaviour at the piers.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Transverse Earthquakes on Seismic Response of Bridges With Rocking Foundations and Various Shear Keys

El-Hawat

Fatahi

Mosavi

2020

WIT Transactions on the Built Environment

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Rocking foundations are proven to be an effective base isolation technique that improves the seismic performance of bridges and minimises the damage at the piers during large earthquakes. However, due to the foundations ability to uplift, the subsequent reduction of the pier's stiffness leads to larger column drifts and deck displacements. This not only attracts larger stresses to the transverse direction of the deck, but also at the abutment which, if not carefully considered, can lead to severe damages. Therefore, this study will investigate the seismic response of bridges with rocking pile foundations subjected to transverse earthquake excitations and compare it to the response of conventional fixed base bridges. Two separate shear key performance levels are investigated for each bridge: (1) non-linear shear keys that break off; and (2) shear keys that remain rigid. 3D numerical models of the bridges are developed using finite element software with consideration of soil-structure interaction. Moreover, non-linear time history analyses are performed on the bridges using four ground-motion records, where their dynamic response are then compared. Results show that the conventional bridges collapsed due to the development of plastic hinging at the piers. However, the bridges with the rocking pile foundations experienced significant deck displacements which caused flexural plastic hinging of the deck and the subsequent collapse of the bridge. Moreover, when the shear keys failed, the deck experienced large displacements at the abutment which caused the bearing to rupture and displace permanently with the risk of unseating and span failure. Bridges with this foundation system will require additional design provisions to prevent such failures from occurring.

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Geosynthetic-reinforced cushioned piles with controlled rocking for seismic safeguarding

Cited by 23 publications

References 62 publications

WITHDRAWN: Seismic Analysis of RC framed Building Situated in High Risk Seismic Zone with Recyclable Scrap Tyre Mix for Base Isolation using Finite Element Modeling

WITHDRAWN: Seismic Analysis of RC framed Building Situated in High Risk Seismic Zone with Recyclable Scrap Tyre Mix for Base Isolation using Finite Element Modeling

Observed Performance of Highway Embankment over Soft Marine Clay: A Case Study in Wenzhou, China

Impacts of Transverse Earthquakes on Seismic Response of Bridges With Rocking Foundations and Various Shear Keys

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