Monitoring and certification of seismic constructions
Monitoring and certification of seismic constructions

Monitoring and certification of seismic constructions

Probabilistic estimation of reliability and failure values for monolithic buildings based on the results of certification

Authors:    Vladimir A. Lapin    Yerkin S. Aldakhov    Serik D. Aldakhov    Alimzhan B.Ali    
Rubric:     Monitoring and certification of seismic constructions   

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In 2017-2018, the total certification of the housing stock of multi-apartment buildings in Almaty was carried out for the first time. According to the results of certification, a total of 8,171 buildings were entered into the database, of which 1,425 are multi-storey monolithic buildings of various storeys and structural types. It was also revealed that 1305 monolithic buildings are earthquake-resistant, 27 – non-earthquake-resistant and 93 are located in the zone of tectonic faults on the territory of the city. Therefore, it is useful to accept the pessimistic hypothesis that buildings located in the zone of tectonic faults will be destroyed. Under these conditions, quantitative estimates of the failure probability and reliability values for monolithic buildings were obtained for the first time. The high earthquake resistance of monolithic buildings has been confirmed. It is established that when taking into account the influence of tectonic faults, the probability of failure of a monolithic building increases by more than 4 times. The frequency of earthquakes is taken into account according to the current "Map of seismic zoning of the Republic of Kazakhstan". Methods of strengthening monolithic buildings should be individual and determined by the results of experimental studies.


PROBABILISTIC ESTIMATION OF RELIABILITY VALUES FOR BRICK BUILDINGS

Authors:    Vladimir A. Lapin    Serik D. Aldakhov    Yerkin S. Aldakhov    Alimzhan B.Ali    
Rubric:     Monitoring and certification of seismic constructions   

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In 2017-2018, for the first time in the city of Almaty, a complete certification of the housing stock of apartment buildings was carried out. 1607 multi-storey brick buildings 2-4 floors high were identified. Based on the results of certification, quantitative estimates of the probability of failure and reliability for brick buildings were first obtained. The frequency of earthquakes is taken into account. A priori probabilities of brick buildings failure were calculated by statistical modeling using experimental data obtained during the recording of explosions in MEDEO. The results of reliability and failure estimates will be used for practical recommendations to reduce risk and expected losses in possible earthquakes.


Probabilistic Assessment of Reliability and Risk Values by Certification Results

Authors:    Vladimir A. Lapin    Yerkin S. Aldakhov    Serik D. Aldakhov    Alimzhan B.Ali    
Rubric:     Monitoring and certification of seismic constructions   

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For the first time in Almaty full passport of apartment stock of multiapartment building was carried out. The structure of the housing stock was revealed with the allocation of groups of buildings according to structural solutions and assessment of their seismic resistance. Based on the results of certification, quantitative estimates of failure probability values for different types of buildings were obtained. Formulas for estimation of quantitative value of seismic risk are obtained. The number of deaths in the estimated zem-shakes was estimated. The results of the assessments will be used for practical recommendations to reduce risk and expected losses in possible earthquakes.


Residential Buildings Classification of Karakol City (Kyrgyzstan)

Authors:    Kamchybekov Yrysmendi   
Rubric:     Monitoring and certification of seismic constructions   

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Recently, earthquake engineering efforts have devoted much attention to the issue of seismic vulnerability based on the concept of seismic risk at which the loss degree is estimated for elements in terms of physical, economic and social losses. The question of seismic vulnerability of the built environment to earthquakes covers a very large spectrum of tasks. From these tasks, the main one is the probabilistic estimation of vulnerability as a basic loss element in the estimation of the expected seismic risk.


Seismic Reliability of Modern Housing in Ulaanbaatar City

Authors:    Bazarov A.D.    Berzhinskaya L.P.    Demberel S.    Kiselev D.V.    Salandayeva O.I.   
Rubric:     Monitoring and certification of seismic constructions   

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The study of seismic vulnerability of residential buildings in Ulaanbaatar has been performed for 14 typical objects. Those included old brick houses, 5- and 9-story large-panel houses, and new 8-16-story frame buildings. Classification of buildings by seismic resistance has been conducted on the new Russian scale GOST R (project). Engineering-seismometric studies have been made on dynamic characteristics of buildings at microseisms. Seismic risk assessment has been made for housing and population of Ulaanbaatar.


The Tests and Results of Engineering and Seismic Monitoring of Objects of Hydraulic Structures of Armenia

Authors:    Geodakyan E.G.    Karapetyan J.K.    Karapetyan S.S.    Oganesyan S.M.   
Rubric:     Monitoring and certification of seismic constructions   

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In reservoirs of Armenia with total capacity about 1.4 milliard m3 is concentrated, more than 75% of above mentioned amount of water in 20 reservoirs. The reservoirs with technical parameters and class of hydraulic structures (dams) are considered essential and refer to the most responsible hydraulic structures. On proposal of IGES NAN RA for technical modernization projects of the reservoirs seismic engineering system on the dams were obtained on required conditions. This article includes tests and the main results of seismic engineering monitoring of dams and reservoirs.


Problems of Scientific and Technical Support, Technical Inspection and Monitoring of Unique Structures in Kazakhstan Taking into Account the Requirements of the Eurocodes

Authors:    Kropachev P.A.    Kurohtina I.A.    Nuguginov G.S.   
Rubric:     Monitoring and certification of seismic constructions   

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The article highlights the issues and the experience of KazMIRD Institute in the field of scientific and technical support and monitoring of technically complex and unique buildings and structures on the example of Astana taking into account the requirements of the Eurocodes in the process of the construction and operation.


The Analysis of Paleoseismicity Using the Results of Macroseismic Survey of Historical Buildings Built in XVII-XVIII Century in Kenigsbrg

Authors:    Borsukova O.V.    Drobiz M.V.    Koff G.L.    Kukshir L.G.   
Rubric:     Monitoring and certification of seismic constructions   

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Is known to in September 2004 several earthquakes with a magnitude of 5.4-5.6 has experienced in Kaliningrad and in the eastern part of the region. In order to assess whether such strong seismic impact on the area previously, the authors estimate paleoseismicity of territory through analysis of macroseismic manifestations on the old buildings in various parts of the city by indirect methods.


On Building Earthquake-Resistance Assessment Dependability on the Basis of Diagnostics Results by the Low-Intensity Impulse Input Method

Authors:    Kabantsev O.V.   
Rubric:     Monitoring and certification of seismic constructions   

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The paper presents the results of the analysis of buildings’ technical state and earthquake resistance estimation procedures based on the diagnostics data by the low-intensity impulse input. A comparative analysis of buildings’ dynamic characteristics variation under the changes of structural rigidity parameters is presented. A comparative analysis of load-bearing capacities for structural elements with different rigidities is provided.


Technical State Monitoring for the Sports Complex Large-Span Roof

Authors:    Bazarov A.D.    Barannikov V.G.    Tatkov G.I.   
Rubric:     Monitoring and certification of seismic constructions   

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The paper discusses the results of using methods of periodic (discrete) spatial engineering and seismological monitoring  at the finishing construction stage of the Sports Complex (Ulan-Ude). The micro-dynamic modal method informative content is shown in nondestructive testing both of individual elements and in monitoring of the changes in the state of large-span structures and in experimental estimate of design finite-element models approximation.


Study of the seismic safety state of building structures for cultural and historic buildings in Tajikistan

Authors:    Sanginov Abdusamad M.   
Rubric:     Monitoring and certification of seismic constructions   

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The paper presents the main results of the visual inspection of technical condition of the cultural and historic building structures in Tajikistan and establishes cause-effect relations of their temporary physical deterioration, assessment of building structures and recommendations for development of an integrated system approach to preservation of historic stone buildings.


Probabilistic estimation of reliability values for frame buildings based on the results of certification taking into account tectonic faults

Authors:    Vladimir A. Lapin    Yerkin S. Aldakhov    Serik D. Aldakhov    Alimzhan B.Ali    
Rubric:     Monitoring and certification of seismic constructions   

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With budget funding for two years in 2017-2018, the total certification of the housing stock of multi-apartment buildings was carried out for the first time. A total of 8,171 buildings were entered into the database, of which 1,847 are multi-storey frame buildings of various storeys and

design solutions. It is established that 1628 frame buildings are earthquake-resistant, 59-buildings with the first flexible floor are non-earthquake-resistant and 160-are located in the zone of tectonic

faults on the territory of the city. The hypothesis is accepted that buildings located in the zone of tectonic faults will be destroyed. Under these conditions, quantitative estimates of the failure probability and reliability values for frame buildings of various types were obtained for the first time. The frequency of earthquakes is taken into account according to the current "Map of seismic zoning of the Republic of Kazakhstan". The results of the reliability and failure estimates are used for practical recommendations to reduce the risk and expected losses in possible earthquakes. Total reinforcement of frame buildings with the first flexible floors (59 buildings) is proposed. However, the conditional probability of failure for a group of residential frame buildings will remain non-zero. The method of amplification should be determined based on the results of experimental studies.


Probabilistic estimation of reliability values for large-panel buildings based on the results of certification

Authors:    Vladimir A. Lapin    Yerkin S. Aldakhov    Serik D. Aldakhov    Alimzhan B.Ali    
Rubric:     Monitoring and certification of seismic constructions   

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Under the agreement with the city authorities, in 2017-2018, for the first time, a full certification of the housing stock of apartment buildings was carried out. 2658 multi-storey large-panel buildings of various storeys from 2 to 9 floors were entered into the database. Based on the results of certification, quantitative estimates of the probability of failure and reliability for large-panel buildings of various types were obtained for the first time. The frequency of earthquakes is taken into account according to the current "Map of seismic zoning of the Republic of Kazakhstan". The reliability value is obtained for the entire group of large-panel buildings. It was revealed that large-panel buildings with the first flexible or brick floor are not earthquake-resistant. The results of the reliability and failure estimates are used for practical recommendations to reduce the risk and expected losses in possible earthquakes. It is proposed to strengthen large-panel buildings with the first flexible or brick floor (33 buildings). The method of strengthening should be determined by special studies.