SOIL-STRUCTURE INTERACTION IN MULTISTOREYED FRAMES WITH SEQUENCE OF CONSTRUCTION

Abstract

Multistoreyed building frames' are usually analysed by th conventional one step method which assumes.that all designed lo are imposed only after the frame has been completed upto roof level. In actual practice dead loads, due to self weight of members and finishing items are imposed in stages as the construc-tion of building proceeds storey by storey. In this thesis a model of sequential construction has been assumed and an eleven storeyed, 3 bay frame having 4 bays in longitudinal direction has been analysed in 3-Dimension by using displacement method incor-porating the effect of foundation settlement and axial deformation of the members. The foundation element has been modelled as a member resting on winkler foundation with normal and tangential subgrade moduli assumed suitably for this analysis. The analysis has been extended for structure resting on non-homogenous soil, however, the results presented in this Thesis are restricted to three dimensional self weight analysis for homo-genous soil-structure interaction with and .without the effect of sequence of construction, Two programmes for automatic mesh generation and plotting of frames were developed to improve the realibility of input data, and interpretation of output results. 7 comparative picture of analysis incorporating settlement of foundation has been drawn with similar analysis where the foun- dation is represented by fixed support at the base. In attempt has been made to highlight certain parameters of settlement analySis. Affer highlighting the analysis, scope for future work has been outlined,