Utkin V.S.
Utkin V.S.

Уткин В.С. Utkin V.S.
Dr. Sci., professor Vologda State University


Publications

The Reliability Calculation of Reinforced Concrete Column
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The article describes the experimental-theoretic method for the estimation of relative deformation of reinforced concrete column on the operation stage. The article also proposes methods for the calculation of reinforced concrete columns reliability on the strength criteria in condition of the single type of the stress plot of concrete column (compression). The offered methods take into account the incompleteness of statistical information. The article is intended for specialists in inspection and testing of reinforced concrete structures.

Calculation of Soil Bases Reliability of Buildings and Structures on Bearing Capacity Under Reconstruction
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The article describes new methods of calculation of soil bases reliability (probability of non-failure) according to the load-bearing capacity criterion at the operation stage. The reliability of soil bases is considered as an integral part for assessing the overall operational reliability of buildings and structures, as well as for making a decision on the possibility and feasibility of reconstruction with increasing load. The proposed method of reliability calculation can be used to assess the reliability of load-bearing elements of the overhaul with replacement of parts of the building. The algorithm of the method of reliability calculation is presented in the numerical example of reliability calculation. 

Calculation of reliability of slab foundations on soil bases by sag criterion
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The article describes the method of calculation of soil bases reliability with limited statistical information using controllable parameters of calculated model by the possibilistic method according to the non-admissibility criterion of general setting level change value taking using generalization principle of Zaden’s, L. fuzzy sets theory. Design formulas are given, and the algorithm of soil bases calculation reliability according to the deformation criterion is shown using an example.

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EVALUATION OF LOAD-BEARING CAPACITY AND RELIABILITY OF STRUCTURAL ELEMENTS AFTER SEISMIC IMPACTS
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The article discusses the problem of evaluation of safety of structures after seismic impacts. For the safety adopted the ultimate load and reliability of structures. The new methods proposed for evaluation of the ultimate loads and reliability for the main load-bearing elements of structures.

Calculation of the Bearing Capacity of the Ground Base for Baretta and Definition of the Effective Depth of the Foundation
Issue: №6 2018
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Deep-hole slotted foundations are relatively new constructive parts of buildings and structures. Slot-hole foundations are considered to be foundations of deep embedding, if the vertical loads on it are perceived not only by the soil in the base of the foundation, but also by friction-adhesion forces along its lateral surfaces. Improving the methods of their calculation increases the safety of their operation and is an actual problem. A new description of the operation of the foundation in the soil of the foundation is proposed on the basis of the occurrence of friction-adhesion forces along its lateral surface as a result of microdisplacements (deformations) of the surface layers of the foundation material in the soil. On the basis of a new approach to the description of the operation of the slotted foundation of a deep foundation in the foundation soil, a calculation formula is given for the bearing capacity of the foundation soil and the formula for determining the effective foundation depth.