No abstract

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 earthquakeresistant. 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 largepanel buildings with the first flexible or brick floor (33 buildings). The method of strengthening should be determined by special studies.

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 nonzero. The method of amplification should be determined based on the results of experimental studies.

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.