Batter piles are most commonly used to resist large lateral loads caused by winds, tidal waves and soil pressure as experienced by offshore structures, bridges, and towers in general. The details in literature on the dynamic behaviour of these batter piles based on in-situ tests are limited. The present study focused on dynamic lateral behaviour of single batter piles and batter pile groups subjected to machine induced vibrations using 3D finite element (FE) analysis. The coupled soil-pile system consisting of soil mass, pile/pile groups, and oscillator motor assembly mounted on the top of the pile cap has been modelled using ABAQUS. The soil mass was considered as a half space through appropriate model dimensions and absorbing boundary conditions (using infinite element). A hybrid modelling approach was adopted to obtain the bending moment along the length of the pile. The 3D FE models were developed based on the field tests conducted by the authors on bored cast in-situ batter piles (three batter angles 0°, 10° and 20°) and pile groups (0° and 20°). Dynamic lateral loads were applied on the pile cap in the form of sweep loads for varying force levels of excitation separately. The responses of the 3D FE models were obtained in terms of displacement time histories at mid height of pile cap, displacement, and bending moment profile along the pile length for all the considered cases. This study show that single batter piles (batter angles 10° and 20°) attract the bending moments three times more than single vertical piles.
Vibrations in four buildings located at different positions along the Delhi Metro Rail Corporation (DMRC) network have been measured and reported. Vibrations developed due to the passage of metro trains through tunnels located at a depth up to 30 m from the ground level were measured on the considered buildings at different floor levels. To interpret the effect of vibrations on buildings, different vibration parameters, viz. Peak Ground Acceleration (PGA), Peak Ground Velocity (PGV) and frequency content are obtained from the recorded vibrations. These parameters change with the location, depending on the dynamic characteristics of the soil profile at the site of measurement and the building. It is observed that the maximum amplitude of vibrations measured during this study is more than the threshold provided by standards of different countries and can cause vibration of rigid building components, annoying physical sensations in the human body, interference with activities such as sleep and conversation, rattling of window panes and loose objects and fear of damage to the building and its contents.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.