Alimzhan B.Ali
Alimzhan B.Ali

Али Алимжан Alimzhan B.Ali

Engineer, KazRDICA JSC, Almaty, Republic of Kazakhstan



Publications

Probabilistic estimation of reliability and failure values for monolithic buildings based on the results of certification
Issue: #4 2021
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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
Issue: №4 2020
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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
Issue: №3 2020
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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.

Probabilistic estimation of reliability values for frame buildings based on the results of certification taking into account tectonic faults
Issue: #3 2021
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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
Issue:
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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.