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Advances in Concrete Construction   Volume 7, Number 2, April 2019, pages 65-74
The role of slenderness on the seismic behavior of ground-supported cylindrical silos
Aysegul Durmus Demir and Ramazan Livaoglu

Abstract     [Full Text]
    This paper reports on the results of a parametric study, which examines the effects of varying aspect ratios on the dynamic response of cylindrical silos directly supported on the ground under earthquake loading. Previous research has shown that numerical models can provide considerably realistic simulations when it comes to the behavior of silos by using correct boundary conditions, appropriate element types and material models. To this end, a three dimensional numerical model, taking into account the bulk material-silo wall interaction, was produced by the ANSYS commercial program, which is in turn based on the finite element method. The results obtained from the numerical analysis are discussed comparatively in terms of dynamic material pressure, horizontal displacement, equivalent base shear force and equivalent bending moment responses for considered aspect ratios. The effects experienced because of the slenderness of the silo in regards to the seismic response were evaluated along with the effectiveness of the classification system proposed by Eurocode in evaluating the loads on the vertical walls. Results clearly show that slenderness directly affects the seismic response of such structures especially in terms of behavior and the magnitude of the responses. Furthermore the aspect ratio value of 2.0, given as a behavioral changing limit in the technical literature, can be used as a valid limit for seismic behavior.
Key Words
    cylindrical silos; bulk material-silo wall interaction; seismic response; dynamic; slenderness
Aysegul Durmus Demir: Department of Civil Engineering, Karadeniz Technical University, 61080 Trabzon, Turkey
Ramazan Livaoglu: Department of Civil Engineering, Uludağ University, 16059 Bursa, Turkey

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