THE INFLUENCE OF VERTICAL STIFFENERS ON THE STIFF CHARACTERISTICS OF SILO CAPACITIES FOR GRAIN STORAGE
Journal Title: Вісник Національного університету "Львівська політехніка". Серія "Теорія та практика будівництва" - Year 2018, Vol 0, Issue 888
Abstract
The paper deals with the behavior of cylindrical steel capacity under the load with different number of vertical stiffeners. It was studied both short constructions with the clamp in all points and relatively tall constructions with the clamp in only supporting points of ribs. Quantities of radial deflections was compared for capacities made from flat and shaped sheets of different thickness. It was shown that deflections of capacities will be bigger than capacities without ribs under axially symmetric load and small quantity of ribs. During the increase of the quantity of ribs, bending deflections is expanding too until they obtain their maximum point. After this monotone decrease began. The given tendency is the general characteristic feature of capacities of both flat and shaped sheets. But it differs in place of deflection points in quantitative ratio. Under the asymmetric load and small quantity of vertical ribs the quantity of deflections is far less than in ribless capacities. A domain can appear for shells from flat sheets of small thickness within which deflections increase insignificantly. The shape, length, main geometric characteristics of vertical ribs and their influence on the work of the capacity were studied in details. It was represented approximate formulas that allow estimating correctly the area of cross-section, moment of inertia and moment of the rib support in wide range of thicknesses value. The given numerical example illustrates convenience of doing preliminary estimate of the rib thickness in safety margin. It was analyzed the changing of longitudinal force and bending moment in vertical ribs and their strain in capacity under axially symmetric expanding effort and under the asymmetric load, according to diagram of wind pressure. The results show that end effect for capacities of small elongation spread to all the height under axially symmetric expanding effort. But it decays in some way near the middle of the capacity, which thickness is growing. The higher is the capacity, the lesser is the effect of ribs on its stiffness. And zone of the end effect moves to the end wall. During the increase of the thickness of capacity, the diagram of moments is buckling and a domain for zero value moments is appearing. Under the asymmetric load the efficiency of vertical ribs increases, particularly when its number is big enough. It was mentioned graphical illustrations of capacities’ deflection in different combinations of loads and variation of rib’s height, pattern and the thickness of sheets of the body.
Authors and Affiliations
Natalia Makhinko
Keywords
Related Articles
- EP ID EP494706
- DOI -
- Views 80
- Downloads 0
Бетони поліфункціонального призначення на основі композиційних цеолітвмісних портландцементів
It was developed fundamentally new concept of creation of multifunctional purpose concretes using composite zeolite-containing Portland cements with optimized particle distribution and modification by chemical admixtures...
ВПЛИВ ЛАЗЕРНОГО ВИПРОМІНЕННЯ НА ВАЖКИЙ БЕТОН
In many countries (Japan, USA, China, Poland, etc.) the studies of the influence of laser radiation on the surface of various building materials are being carried out for a long time, including the military purposes. Mos...
ЗБІРНО-МОНОЛІТНІ ЗАЛІЗОБЕТОННІ ДВОБАЛКОВІ НЕРОЗРІЗНІ ПРОГОНОВІ БУДОВИ МОСТІВ ДЛЯ СКЛАДНИХ УМОВ БУДІВНИЦТВА І ЇХ РОЗРАХУНОК
A significant increase of the intensity of road and urban transport requires new approaches to its improvement, especially in areas with dense existing buildings. The solution of this problem may be improving by building...
USING IMPROVED DESIGN METHOD OF SHEER STRENGTH OF REINFORCED CONCRETE BEAMS
The analysis of the efficiency of six types of slabs has been carried out, which differed in material, internal form and weight. The comparison and the comparison of the same in size, but different in constructive char...
INFLUENCE OF DEFECTS OF THE WORKING REBAR ON THE BEARING CAPACITY OF THE REINFORCED CONCRETE BEAMS
Every construction is influenced by different factors during operation. As a result, there are various defects and damage of these elements, which affects their operating condition. One of such defects is the corrosion o...