The assessment of building deformation due to tunnel inducced ground movement has become an essential part in the planning and construction process of any tunnellng project in an urban enviroment. In current engineering practice the building is normally represented by a plane strain structure onwhich a settlement profile is imposed. This approach does not account for any three-dimensional (3D) deformation mode of the building. Recently published case studies, however, have demonstrated that 3D deformation such as twist occurs presented in buldingssubejected to tunnel construction. Results from a 3D Finite Element (FE) parametric study are presented in which a building is represented by elastic shell elements. All buidings we in plan perpendicular to the tunnel axes while their stiffness, theis size (width and length) and thetunnel depth were varied. It is shown how these different parameters influence the twist deformation. The study reveals a simiiar trend between twist and building size, building stiffness and tunnel depth as found by Potts &Addenbrooke (1997) for deflection ratio and horizntal building strain.
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