Dynamic soil structure interaction of bridge piers supported on well foundation. Issue 97 (June 2017)

• Record Type: Journal Article
• Authors: Chowdhury, Indrajit; Tarafdar, Ronkoyel; Ghosh, Ambarish; Dasgupta, Sambhu P.
• Is Part Of: Soil dynamics and earthquake engineering. Issue 97(2017)
• Page Start: 251
• Page End: 265
• Publication Date: 2017-06
• Subjects: Well foundation -- Bridge Pier -- Modal analysis -- Puzrevsky functions -- DSSI; Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2017.03.005
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: For both steel and RCC Bridges passing rivers or creeks, common practice in many countries is to provide concrete wells to support the bridge girders. For many bridges that are strategically important in terms of defense or trade, it is essential that they remain functional even after a strong earthquake hits the structure. The present state of the art for design of well foundation is still marred with a number of uncertainties where a simplistic pseudo static analysis of its response only prevails, though it is a well-known fact that loads from super structure, character of soil and its stiffness plays an important role in defining its dynamic characteristics. The present paper is thus an attempt to present a dynamic analysis model trying to cater to a number of such deficiencies as cited above and also provide a practical model (amenable to design office application) that can be used to estimate the pier, well and soil's dynamic interaction Highlights: Provides an improved formulation of time period for the fixed based pier compared to present recommendation in codes. Gives two general solution of pier well interaction considering the well foundation as a (i) rigid and (ii) flexible structure. Considers the kinematical interaction effect of soil in addition to inertial interaction.