Abstract
This paper presents review of author’s researches of thin cylindrical shells of large diameter filled with soil and used in construction of berths, breakwalls, retaining walls, bridge piers, and etc. The theoretical model for soil stability of the researched structures based on soil boundary state of stress solution with allowance for bond slip is developed. Suggested correlation represents a theoretical model that functionally relates parameters of foundation soil and construction sizes with maximum horizontal force, which might be held by a structure without loss of soil bearing capacity. The numerical model of a thin cylindrical shell with infill under eccentric load is developed. Modeling and experimental determination of the interface strength of the contact surface between the infill and the inner surface of the shell is proposed. The details of testing of physical model used for the experiments are discussed. The effects of the interface friction on the shell behavior and on the foundation stresses are investigated. The influence of parameters affecting the interaction between the soil infill and the inner surface of the shell material is determined. It is based on a comparison of experimental results with calculations performed using the proposed mathematical model. The results of experiment are shown in comparison with calculation data’s for proposed numerical model. Effect of ice load on shell structures with infill on compressible soil is also considered in this research. The numerical model is proposed, which takes into account the interaction between soil environment, effect of ice load and thin shell with infill, to predict the stability and durability of shell structures under ice load.
Highlights
Thin shells with infill can be used as alternative engineering solutions in the design of berths, docks, break walls, and in retaining walls supporting foundations of trestles and bridge piers.These constructions consist of thin shell with infill of certain physical and strength properties
The theoretical model developed in the previous section based on the mathematically precise solution, provides opportunity of testing the previously suggested numerical model of the described structures with account of its parameters obtained from experiments (Bekker et al 2015)
The study revealed recommended range of strength reduction coefficient Rinter to use for calculations of thin-walled cylindrical infilled shells of large diameter set on compressible soil foundations
Summary
Thin shells with infill can be used as alternative engineering solutions in the design of berths, docks, break walls, and in retaining walls supporting foundations of trestles and bridge piers These constructions consist of thin shell (made of steel or reinforced concrete) with infill of certain physical and strength properties. The structure’s diameter (D) to its height (H) ratio, D/H, are within the range of 0.7 to 1.0 for these structures These structures are relatively cost-effective and have several advantages during the constructions. The production and transportation of heavy reinforced structures are not possible due to remote locations of the construction sites In these situations, these steel shells of large diameter partially grounded in the foundation soil have significant advantages over other types of supporting structures (Fig. 1, d)
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