Foundation Tilt

Foundation tilt may develop during installation owing to uneven skirt penetration resistance or sloping seafloor. It is desirable to keep the platform level, and for most platforms this has been attempted by applying eccentric ballasting during installation. 

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The foundation bed or the structure on which the motor is mounted is not rigid, is tilted or is uneven. Tighten foundation bolts and check for proper alignment of the motor and the drive. Make the foundation or structure as rigid as possible. 

The correction of the measured PM IRRAS signal for the PEM response functions was introduced in the studies of the potential-induced reorientation of a film formed by 4-pentadecyl pyridine [81], one year later. For the first time, the absorbance of a Langmuir film adsorbed at the electrode surface was determined in that paper. The theoretical spectrum of a film of randomly oriented molecules was calculated from independently measured optical constants, and tilt angles of the pentadecyl chain and the pyridine moiety were determined using the absolute method and Eq. (44). This work laid the methodological foundations for future PM IRRAS studies on monolayers and bilayers formed by amphiphilic molecules at electrode surfaces. 

The damage is illustrated by the magnitude of the base shear force transmitted to RC building superstructures by the soil foundation. The stability of the superstructure is defined by the absolute peak values of vertical subsidence, lateral drift motion and tilting angle. The relative performance of each foundation type is presented in the subsequent subsections. 

As depicted in Figure 8.2, eccentrically loaded shallow foundation experiences rotation (a) about the central axes of the contact surface. This rotation occurs as a result of nonuniform settlement along the transverse direction due to nonuniform contact stress caused hy unbalanced moment about the longitudinal central axis of the bottom surface of the foundation. This type of foundation rotation results in the titling of the supported structure. Tilt is defined as... 

Representation of Existing Damage In their current condition, ruins of ancient structures present many different types of damage. Most common are missing pieces (cutoffs) that reduce the horizontal sections in contact, foundation problems resulting in tilting of the columns. 

Tilted buildings are signs of uneven loading of subsoil (Fig. 2g). When seismic vibrations act on water-saturated soil, it loses coherence and behaves like a fluid. Building foundations - losing support during liquefaction events - suffer differential... 

Liquefaction Performance of Building Foundation Systems, Fig, 1 Settlement and tilting of residential buildings in Kamisu City, Japan, following the 2011 Tohoku-Kanto earthquake (Ashford et al. 2011)... 

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