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[1]A Lata,GUO Xun,DONG Xiaoyao,et al.Analysis of the Aseismic Defects in Multi-Storey Buildings[J].Journal of Seismological Research,2024,47(04):563-578.[doi:10.20015/j.cnki.ISSN1000-0666.2024.0053 ]

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Analysis of the Aseismic Defects in Multi-Storey Buildings

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 47 Number of periods: 2024 04 Page number: 563-578 Column: Public date: 2024-08-20

Title:: Analysis of the Aseismic Defects in Multi-Storey Buildings

Author(s):: A Lata¹; GUO Xun²; DONG Xiaoyao³; DONG Ce⁴; LUO Ruofan⁵; WANG Bo²; (1.Yunnan Earthquake Agency,Kunming 650024,Yunnan,China)(2.Institute of Disaster Prevention,Sanhe 065201,Hebei,China)(3.Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,Heilongjiang,China)(4.Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)(5.School of Civil Engineering,Jiaying University,Meizhou 514015,Guangdong,China)

Keywords:: earthquake damage investigation; collapse mechanism; hard brittle component; weakly extended component; deformation saturation; collapse trigger point

CLC:: TU973+.31

DOI:: 10.20015/j.cnki.ISSN1000-0666.2024.0053

Abstract:: Earthquakes frequently occur in China; minor earthquakes may cause disasters and major earthquakes may cause catastrophes.And the collapse of multi-storey buildings is a major factor causing the loss of life.Aiming at these problems,and based on the earthquake damage data from the field investigation of a dozen of devastate earthquakes(M≥6.0)that have occurred in Sichuan and Yunnan since the 2008 Wenchuan M_S8.0 earthquake,this paper firstly compares the structural forms,plan and facade arrangement of buildings,distribution of lateral components,and structural system of the “damaged” and the “undamaged” buildings,then analyzes the seismic damage characteristics of the structures,and finally summarizes the causes of the buildings' damage and collapse.It is believed that in the strong-earthquake event,the damage and collapse of the buildings are due to their own aseismic defects such as “dispersion”,“brittleness”,“eccentricity”,“singleness”.Among these defects,“eccentricity” in buildings is more common.Through the experimental research,it is found that the constraint of walls makes the mechanical properties of the lateral components of the same level of a building vary greatly,that is,the hard and brittle components and the weakly-extended components coexist on the same floor of a building.This is different from the traditional seismic design theory,which equally treats all components on the same floor of buildings.Finally,this paper analyzes the “eccentricity” defect of the damaged buildings in these over ten earthquake disasters,and proposes the Deformation Saturation theory that can more reasonably explain the damage and collapse of the buildings in earthquake disaster areas.

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Last Update: 2024-08-20