Seismic effect of soil structure interaction on Continuous bridge structure

Chandavar, Nitin and Krishnamoorthy, Agrahara (2016) Seismic effect of soil structure interaction on Continuous bridge structure. In: National Conference on Innovative Techniques and Latest Trends in Civil Engineering,, 02/04/2016, Kalasalingam University, Tamil Nadu, India.

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Bridges are the essential and effective links of the transportation system. Bridges are susceptible to the damage caused by earthquakes. The behavior of a bridge structure under earthquake forces depends on its stiffness and the supporting foundation and soil. Soil-structure interaction (SSI) is a phenomenon where the response of both soil and structure influences the response of each other. In conventional analysis of bridges, superstructure is assumed as resting on rigid soil and SSI effect is neglected. There are few studies to investigate the effectiveness of SSI on the bridges. However, the behavior of the semi-infinite soil mass is represented using a frequency independent spring-dashpot model. It may be noted that under seismic excitation, SSI system is infinite and there exists energy exchange between superstructure and foundation. For the realistic analysis of bridge structure, the soil and foundation are to be considered as an integral part of the Structure. For the present study, a continuous bridge structure subjected to the earthquake is analyzed considering SSI effect. In the proposed study, the effect of SSI on continuous bridge structure is investigated using finite element model for the soil. The bridge structure is subjected to four earthquakes having different magnitude and frequency in order to study the effect of SSI.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Continuous bridges, soil structure interaction, Finite element model
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 13 Jan 2017 14:12
Last Modified: 13 Jan 2017 14:12

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