Nikolay Vatin

Reinforced Soil Beds on Weak Soils

Changing a layer of weak soil in deformed foundation with a compacted soil bed consisted of various strong materials (sand, gravel, pebble-gravel, production waste materials). Existing calculation methods and techniques to build compacted soil beds based on weak highly compressive soils do not meet up-to-date requirements. Calculation methods used the dimensions of compacted beds quite often appear to be overestimated, and this results in increase in costs and working hours needed to build artificial foundation. The paper presents the possibility of using reinforced soil beds as an efficient method to build artificial foundation based on weak soils.

Analysis of the Influence of Dynamic Properties of Structures on Seismic Response According to Montenegrin and European Regulations

The motion of strong earthquakes causes nonlinear deformation and damages to the structure. For structural systems of buildings, domestic and European (EC8) regulation apply algorithm of seismic design based on reference linear-elastic methods that are carried out in two phases. Phase I includes determination of dynamic characteristics of structure, which are then used in phase II for calculation of seismic effects. In this study, parametric analysis of influence of dynamic characteristics of structure was done on multiple numerical examples, according to domestic and EC8 regulations and comparison of results.

Problems of Sub-Mountain Area Development Associated with Collapsing Loess Soils (Case of Tajikistan)

The major part of seismically active Central Asian countries is presented by large-scale sub-mountain upland areas with complex engineering and geological conditions and surface topography as a rule. Plains and flatlands (valleys) in Tajikistan and Kirgizstan account for 10%, and all the rest areas are presented by mountains. Lack of agricultural area is considered to be a pending problem and calls for urgent solution. One of the efficient ways to solve this problem is to develop sub-mountain (hilly) areas which can make it possible to increase level of agricultural production and expand areas for buildings construction. The article deals with sub-mountain development experience based on the case of Tajikistan which can be valuable for different regions.

Experimental Research of a Highly Compacted Soil Beds

The clay loams of semi-solid consistency was tested under static loads. The test results have proved that high values of soil density can change operating conditions of artificial foundations significantly, i.e. a so-called plate effect can be observed. Due to high hardness values highly compacted soil beds allow distributing foundation loads on the considerable part of the area and reducing its value on the edge of the weak layer.

The Use of Decentralized Ventilation Systems with Heat Recovery in the Historical Buildings of St. Petersburg

Historic apartment buildings in Saint-Petersburg no longer meet today’s energy efficiency standards and need upgrading to achieve lower energy-consumption. The possibilities to upgrade old buildings – historic and cultural monuments – are initially limited. A controlled heat recovery ventilation system is considered to be an integral part of energy efficient building. Provided engineering facilities of a building are updated and reequipped energy performance increases without any impact on building exteriors. Different types of decentralized intake and exhaust ventilation systems with heat recovery based on various types of heat exchangers are considered in a detailed way.

Central Ventilation System with Heat Recovery as One of the Measures to Upgrade Energy Efficiency of Historic Buildings

Improving thermal shield in buildings and reducing energy consumption have become major problems to be solved for the recent decades. Natural ventilation accounts for nearly half of heat losses in existing buildings. A controlled heat recovery ventilation system makes it possible to reduce irrational heat losses and improve microclimatic comfort. A typical historic residential apartment building constructed before industrial times in Saint-Petersburg is subject of this article. Options of centralized controlled heat recovery ventilation systems for old historic apartment buildings in Saint-Petersburg are suggested in this article.

Decentralized Ventilation Systems with Exhaust Air Heat Recovery in the Case of Residential Buildings

Decentralized ventilation systems applied in residential buildings are generalized in this article. Basic system elements and devices and tools assigned for its application are considered herein. Basic requirements for design of the ventilation systems used in residential buildings are stipulated.

Centralized Natural Exhaust Ventilation Systems Use in Multi-Story Residential Buildings

An analysis of the schemes related to centralized exhaust ventilation systems used in multi-story residential buildings with ventilation units has been made herein. Main disadvantages of such systems have been determined. An aerodynamic scheme of a system with implementation options has been suggested. Calculation method for the systems has been developed

Research on Industrial Exhibitions Architecture

All-Russian and regional exhibition architecture in the second half of the 19th century through the early 20th century had varied distinct differences in style and design. Temporality of exhibition architecture in those days contributed to a variety of experiments made for pavilions in the context of styles and structures. There was a high demand for the Russian style to be applied for pavilions both in Russia and abroad. First search and application experience in respect to the modern art principles are connected with exhibition architecture. These experiments in the national architecture and art are of a high interest. Neo-classicism was applied in exhibition architecture in the early 20th century to a large extent. The exhibitions of the early 20th century appeared to be special ‘style workshops’. Organizers of certain exhibitions tried to keep uniformity of style of basic constructions. The major merit of exhibition architecture is that it contributed to the transition from eclecticism to a new style on the cusp of the 19th and beginning of the 20th centuries.

Development of the Ventilation System in Historical Buildings of St. Petersburg

The article presents an analysis of the primary technologies used to arrange air ventilation systems in residential buildings in Saint-Petersburg during the late 18th and early 20th centuries. The historic buildings construction and engineering systems is indisputable interest and can be subject to conservation of historic buildings in addition to conservation of architectural facades. The article analyzed historical techniques ventilation device in conjunction with the heating system.