Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic Behavior of Rectangular Closed Diaphragm Walls in Gently Sloping Liquefiable Deposit: Dynamic Centrifuge Testing
Rectangular closed diaphragm walls (RCDWs) are often used as bridge foundations because of their advantageous properties such as high stiffness and construction efficiency, low cost, and minimal vibration and noise. However, there is currently a poor understanding of the seismic behavior of RCDWs used as bridge foundations in a liquefiable deposit, and this has limited the practical application of the same. This paper presents the results of three dynamic centrifuge tests that were conducted to investigate the seismic behavior and liquefaction mitigation capacities of RCDWs with one and two chambers in a gently sloping liquefiable deposit. Specific consideration was given to the performance effects of two integral parts of the RCDW foundation, namely, the RCDW frame and cap. The test results showed that an RCDW foundation was effective for mitigating liquefaction in the soil core. The RCDW frame mitigated the liquefaction by restraining the development of the shear strain and changing the distribution of the excess pore pressure in the soil core through its very high stiffness. The presence of the cap likewise altered the dissipation mode of the excess pore pressure in the soil core by inhibiting outflow and providing additional vertical stress on the soil core. The displacement mode of the multichamber RCDW foundation was also changed by the chamber effect. The results of the present study contribute to a better understanding of this emerging type of bridge foundation and promise to facilitate its practical application.
Seismic Behavior of Rectangular Closed Diaphragm Walls in Gently Sloping Liquefiable Deposit: Dynamic Centrifuge Testing
Rectangular closed diaphragm walls (RCDWs) are often used as bridge foundations because of their advantageous properties such as high stiffness and construction efficiency, low cost, and minimal vibration and noise. However, there is currently a poor understanding of the seismic behavior of RCDWs used as bridge foundations in a liquefiable deposit, and this has limited the practical application of the same. This paper presents the results of three dynamic centrifuge tests that were conducted to investigate the seismic behavior and liquefaction mitigation capacities of RCDWs with one and two chambers in a gently sloping liquefiable deposit. Specific consideration was given to the performance effects of two integral parts of the RCDW foundation, namely, the RCDW frame and cap. The test results showed that an RCDW foundation was effective for mitigating liquefaction in the soil core. The RCDW frame mitigated the liquefaction by restraining the development of the shear strain and changing the distribution of the excess pore pressure in the soil core through its very high stiffness. The presence of the cap likewise altered the dissipation mode of the excess pore pressure in the soil core by inhibiting outflow and providing additional vertical stress on the soil core. The displacement mode of the multichamber RCDW foundation was also changed by the chamber effect. The results of the present study contribute to a better understanding of this emerging type of bridge foundation and promise to facilitate its practical application.
Seismic Behavior of Rectangular Closed Diaphragm Walls in Gently Sloping Liquefiable Deposit: Dynamic Centrifuge Testing
Li, Yan (Autor:in) / Cheng, Qian-Gong (Autor:in) / Zhang, Jian-Lei (Autor:in) / Lyu, Bo (Autor:in) / Wang, Yu-Feng (Autor:in) / Wu, Jiu-Jiang (Autor:in)
19.09.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Prediction of Lateral Spreading Displacement on Gently Sloping Liquefiable Ground
| British Library Conference Proceedings | 2017
| British Library Online Contents | 2018
| British Library Online Contents | 2018
| British Library Online Contents | 2018