Bending Moment and Shear Force Response at the Bottom of Circular Steel Tall Silo in Wind Environment

摘要

Failures of wind engineering in die past reveals that even strict compliance to conventional design methods, including accepted codes and standards, was not sufficient to prevent failures. No wind loading standard or code, can claim to cover completely wind loading. Wind forces are responsible for huge destruction in the world. The present research was on the study of circular steel silo subjected to rigorous wind loading and its effects on the anchorage requirements of tall silos. For the analysis of such a situation, there were few techniques available namely, finite element method, structural matrix analysis. The conventional methods of analysis gives more conservative results and hence gives penalty to the clients. This paper reports the comparison of results by various analysis of tall silos for additional banding moment and shear force in wind environment. The maximum bending moment values (Nm E+06) for silos wim H/D ratio of 7.5 in static, quasi-static (IS code), quasi-static (AS code), dynamic and random analysis techniques were 39.0, 68.3, 185.0, 40.2 and 63.1 respectively. The maximum shear force values (N E+05) for silos with H/D ratio of 7.5 in static analysis, quasi-static (IS code), quasi-static (AS code), dynamic and random analysis techniques were 16.1, 28.1, 76.3, 16.6 and 26.0 respectively. The present analysis is on the basis of wind speed data around Delhi, but the model can be used for any wind speed and location with minor changes.