Design, building and reconstruction of a seismic constructions
Design, building and reconstruction of a seismic constructions

Design, building and reconstruction of a seismic constructions

Diagnostics and improving the safety of the railway bridge on the Uchkurgan-Tashkomur railway line on PC 17 + 494

Authors:    Apsemetov M.Ch.    Ryskulbek A. Zhumabaev    Kurmanbek uulu Nurlan    Altynbek E. Aidaraliev   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The article describes and discusses in detail the process of inspection and testing of the railway bridge on the Uchkurgan – Tashkomur stage km 17+494, carried out by specialists of the Kyrgyz State University of Construction, Transport and Architecture (KSUCTA) on the basis of the contract  with  the Mostootryad  SE NK Kyrgyz railway for the purpose of assessing the technical state of pavement design, evaluation of its conformity to requirements of standard documentation and preparation of technical findings with conclusions and suggestions for further exploitation of the bridge and increasing its operational safety.


Historical Masonry Towers: Overview, Seismic Vulnerability, Behavior During an Earthquake, Seismic Strengthening

Authors:    Aldrebi Ziad Ahmad   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The article provides an overview of historic masonry towers such as the minarets of mosques, bell towers of churches, clock towers, leaning towers, so-called "falling towers" and ruined towers. It was considered what kind of masonry, what kind of mortars the Romans, the ancient Egyptians, the Inca and Mayan cultures in America used. Some aspects of seismic vulnerability of masonry towers were studied. The modes of destruction of thin masonry structures, mechanisms of destruction of masonry in
towers are considered, the seismic behavior of historical masonry towers are
considered, and one of the methods of seismic strengthening using an innovative "smart"
material is presented. 


Research and Assessment of the Seismic Risk of Strong and Destroying Earthquakes on the Territory of Tajikistan

Authors:    Sanginov Abdusamad M.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The area of Tajikistan is 143.1 thousand km2, while about 93% of its territory is occupied by mountains, the maximum heights of which reach more than 7000 m above sea level. The rest of the country (7%) is plains and valleys with heights from 300 to 1000 m above sea level. Such a significant range of heights is explained by the location of the study area in the junction zone of the Tien Shan fold system and the Alpine-Himalayan belt and leads to a wide variety of geological, hydrogeological, landscape-climatic and seismic conditions, analysis of the consequences of destructive earthquakes is of great importance for solving scientific and practical problems in the field of seismology, as well as problems of earthquake-resistant construction. The analysis of consequences of destructive earthquakes is important for solving scientific and practical tasks in the field of seismology and problems of earthquake engineering. One of the main sources of seismic resistance assessment of buildings and structures, along with theoretical and experimental studies, is engineering analysis of the consequences of strong earthquakes. This article deals with the effects of earthquakes on the earth's surface. The example of the following devastating earthquakes that occurred in Tajikistan, the impact of these seismic events on various types of residential buildings built from local materials is considered, and the main reasons for the observed nature of deformations and destruction are discussed.


Operational Reliability of Industrial Buildings in Seismically Dangerous Areas

Authors:    Kulov R.P.    Kulov A.R.    Kulova Kh.R.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The solution of a single-storey industrial building, of working with significant horizontal seismic vibrations. Earthquake building carried out by separating the sole-plate foundation resting on the ground, from the rest of the multi-stage foundation for the frame column. The gap formed by constructive in the individual cells are arranged point-balls bearings, have freedom of movement in the horizontal plane. Under horizontal vibrations of the earth and the sole-plate the rest of the basement and the building itself remain at rest. It noted an interesting fact: the performance and reliability of the proposed solutions of seismic stability of buildings received unexpected confirmation,  that one of the buildings in the Chilean capital of Santiago, built in the sixteenth century, survived dozens of earthquakes, is the oldest building and it became clear that its ancient walls are mounted on ball-shaped stones.


New Constructive Systems of Residential and Civil Buildings and Problems of Actualization of Seismic Norms

Authors:    Khakimov Sh.A.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The article examines the application of new design systems in seismic areas and the suitability of seismic standards for their design.

 


FBD “Irkutsk Frame” System for Multi-Storey Buildings and Structures

Authors:    Fotin O.V.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The FBD “Irkutsk Frame” system (rigid frame bracing system with diaphragms) is presented. Structural features of the design of a unit of the column-girder system and its assembling are described in details. Issues of reducing labor expenditures and resources for producing details and their assembling are considered. Examples of using the FBD “Irkutsk Frame” system under conditions of Irkutsk, seismically active region of construction, are presented. It is noted that the equipment for manufacturing products of the FBD “Irkutsk Frame” system is mainly domestic production.


Preservation of Architectural Heritage and Seismic-Resistant Ecological Facilities

Authors:    Petraskovic Z.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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Historical buildings are masonry mass structural systems. Housing is predominantly in masonry systems. The question is how to preserve the architectural heritage and how to build ecological, healthy buildings made of brick and stone with high seismic resistance. The paper presents the experiences of the author applied on four continents, as well as the directions of further development of systems and technologies.

System DC90 technology is based on the use of special devices and earthquake shock absorbers that protect the integrity of structures and raise their resistance to earthquakes. The technology is protected by several patents. In the developed part of the planet the need for justification for using special devices and new systems of construction is no longer present and the preservation of architectural heritage has an important place. That is why the essence of this technology which can be attractive for the Russian Federation and the region is presented here in detail. The author’s desire is to share his experiences with Russian Federation specialists and to contribute to the development of the field. The application of dampers controlling the forces and displacements in the plane of the wall and perpendicular to the wall is presented for historical objects. Additionally, the tensioning technology with collection compensators for preservation of integrity is discussed. For new massive brick buildings the technology of construction without reinforced concrete framing system, but with vertical bracings and seismic dampers is shown.


Modern Steel Earthquake Resistant Design of Unique Large-Span Coverages of Buildings Ice Arena in Almaty (Republic of Kazakhstan)

Authors:    Vashchenko G.A.    Maximov Yu.S.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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In article modern constructive solutions of two unique large-span coverages of  buildings of the Ice Arena on 12000 spectator places are provided to Almaty of the Republic of Kazakh-stan and ways of increase of their earthquake resistance.


Features Analysis of Dynamic Behavior High-Rise Buildings with the Scientific-Technical Support of Construction

Authors:    Kalmikov A.V.    Kukunaev V.S.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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At the present time it becomes important to ensure safe operation of buildings and structures. This is due, primarily, to the design and construction of complex structural systems with large spans in high-rise buildings. This particularly applies to buildings constructed of reinforced concrete. The choice of configuration plan and space-planning solutions building and its basic elements are produced mainly by architects and developers who are guided mainly architectural and much less design considerations. Therefore, a design engineer at the initial stages of the design need to pay special attention not only to the structural system and construction of the computational model.

This article deals with the problem of seismic resistance high-rise buildings being built at the moment. We consider a 18-storey section, part of a residential complex located in Ilyichevsk.


Wooden Designs in Aseismic Construction of Buildings and Constructions (Domestic and Foreign Experience)

Authors:    Ivanova Zh.V.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The review of various technologies of construction of the wooden buildings which are widely applied as in domestic, and foreign practice of construction in seismically active areas taking into account complex researches of properties of the designs made of wood is provided in article.


The Main Reasons for Large?Scale Destruction of the Spitak Earthquake. Ways to Overcome the Conseguences of Possible Earthquakes in Armenia

Authors:    Chaкhalyan А.L.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The article is devoted to the memory of the Spitak devastating earthquake. The reasons of mass destruction and numerous fatalities are presented. The comparisons in terms of magnitude and other principal factors with the similar earthquakes worldwide are provided. The buildings and structures most affected and those which withstood the disastrous hit of the Earth`s interior are reflected and briefly described. The main activities proved for avoiding the huge destruction and numerous casualties in the territory of the country are pointed out, in particular, the choice of construction technology and application of advanced techniques and approaches for earthquake resistant structures, etc.


RASK System: Retrofited Braced Frames for Improvement of Seismic Performance

Authors:    Perfilev A.P.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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RASK system (braced frame) is intended for the construction of frame residential, public and industrial high-rise buildings up to 12 floors and is made of precast-monolithic reinforced concrete structures. The columns and beams are precast elements made of reinforced concrete. Precast reinforced concrete Cored slabs are used as floor structures. Diaphragms can be implemented as monolithic and precast concrete. Exterior and interior walls are constructed of small piece material or largesize elements. The RASK system is aimed either for conventional or seismic hazard areas, which is particularly important for areas of the Kemerovo region.


Reinforcing Steel AH600C (Brand 20G2SFBA) with Increased Performance for Earthquake Engineering

Authors:    Kodysh E.N.    Sosedov K.E.    Trekin N.N.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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Given a brief description of features and specifications of reinforcement of the class Aн600C (brand 20G2SFBA). Areas of rational application of reinforcing steel of the class AH600C (brand 20G2SFBA) are considered at compression with casual eccentricity, non-central compression with small and big eccentricity in compressed structures of squared cross-section. Are given analytical dependences in the calculation of structures in the first and second group of limit states.


Antiseismic Foundation for Permanent Frozen Areas

Authors:    Belash T.A.    Sergeev D.A.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The I principle of building in permanent frozen and seismic zones is viewed. The I principle is realized by using of high pilework. The special frictional damper is installed between foundation piles. Different constructive solutions of frictional dampers are presented. Behavior resolution of buildings with accepted antiseismic system is given too.


New Concept for Improving the Seismic Safety of Buildings Based on Engineering Analysis of the Effects of Earthquakes

Authors:    Khakimov Sh.A.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The report discusses some new concepts of design and construction of earthquake safe masonry, frame-panel buildings and individual houses built from low-strength materials. New concepts are based on the results of the engineering analysis of the effects of earthquakes in recent years, which occurred in the territory of Central Azia.


Determining the Level of Seismic Effects of Pile Driving

Authors:    Nikitaeva G. A.    Stavnitcer L. R.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The paper examines an instrumental method of determining minimum permissible distances from existing buildings and structures in piling using pile-driving equipment. The method is based on the use of vibration-measuring instruments to register the vibration velocity of oscillations in soil at the different distances and on the comparison of obtained maximums of velocigramms with acceptable limits of oscillation levels determined depending on the type of soil, structural kind of building and technical state of its bearing constructions.


Simulation of a Combination of Seismic and Wind Loads in Designing High-Rise Buildings

Authors:    Gutnikov V. A.    Setuha A. V.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The paper examines the main statements of the methodology of evaluating aerodynamic effects of wind currents on high-rise buildings. The authors present examples of simulating the velocity field of the air flow around the streamlined buildings and structures and of distributing the aerodynamic loads along the surfaces of buildings. Obtained mathematical modeling values of the pressure coefficient distribution along the surface of the building are compared with results of physical experiments.


Vulnerability Of Angarsk-City School Buildings Stock Evaluation Within the Regional Seismic Safety Program of the Irkutsk Region

Authors:    Berzhinskaya L.P.    Berzhinsky Yu.A.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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According to the maps of general seismic zoning GSZ-97, the seismicity of the Angarsk-city area (Irkutsk region) was increased from 2000 from 7 to (8, 8, 9) points. Among 200000 m2, one third of the school buildings stock was built in the period of 1949?64 using anti-seismic methods in accordance with the standard CH-8?57. According to the classification scales MSK-64 and MMSK-86, these buildings belong to the types A and B with the level 5 and 6 of seismic resistance. The rest of the school buildings belongы to the class C7. The calculations show that the individual seismic risk of a 7?magnitude earthquake is classified as a level of «acceptable» risk, the seismic risk of a 8?point earthquake is considered as a «high» risk level. A relative damage extent for the school buildings stock would be evaluated as 0.08 and 0.41, respectively.


Deformation Properties of Masonry as a Piecewise Homogeneous Medium for Elastoplastic Strain Analysis

Authors:    Kabantsev O.V.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The paper sets forth the main principles of determining the masonry deformation properties as a mixed modular medium consisting of heterogeneous materials for the purposes of discrete modeling. The formulas are proposed to define the values of deformation characteristics of the masonry materials with account of the stress and strain state specific character under loading.


Reserves of Fail-Safe Concept of Girderless Frame under Impacts Beyond the Design Basis

Authors:    Berzhinskaya L.P.    Berzhinsky Yu.A.   
Rubric:     Design, building and reconstruction of a seismic constructions   

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The subject of research is survivability of damaged structures of the IMS type girderless frame full-scale fragment prestressed with high-strength cables under the effects of beyond the design basis events. The structure survival indices are provided for by the system strength margins and its compensation characteristics. They are conditioned by the biaxial compression stress field in floor elements due to prestressing, which in accident condition evolution block the crack-formation processes and development of plastic ranges of stress.