Seismic damage investigation and analysis of rural dwellings in Ms6.2 Jishishan earthquake
The seismic damage of rural dwellings in the Ms 6.2 earthquake in Jishishan is explored.The structural characteristics,construction habits and construction techniques of the rural dwellings in the disaster area were summarized.The collapse and typical earthquake damage characteristics of rural dwellings with different structural forms were analyzed.The mechanisms of traditional building practices on the seismic resistance and disaster prevention capability of residential houses were studied.The results of the research and analysis show that the structural systems of rural dwellings are mostly"tiger hugging head"style brick-wood structure,accounting for 50.9%of the total number of researched houses,and there are fewer cases of earthen structure and brick-concrete structure,accounting for 28.2%and 20.9%,respectively.There are many cases of the overall collapse of the earthen structure in the study area,fewer cases of overall collapse of brick-wood structure,and no cases of total collapse of brick-concrete structures.The earthquake damage of brick-wood dwellings mainly consists of cracking at the corners of the gable walls,dislodging at the joints,partial collapse of the gable walls,and cracking of roof laps.The main earthquake damage to earthen dwellings is damage to the corner of the gable wall,collapse of the gable wall,and collapse of the roof.Earthquake damage to brick-concrete structure mainly consists of wall cracking,wall collapse and floor(roof)damage.Bad construction habits such as mud joints,thick-covered loess roofs,and large-weight door decorations exacerbated the earthquake damage to residential houses and should be improved in the subsequent restoration and reconstruction work.Measures and suggestions to improve the earthquake-resistant and disaster-preventive capacity of rural dwellings were put forward with regard to the seismic damage characteristics of different structural systems and construction habits,with a view to providing reference for the construction,strengthening and renovation of rural dwellings in the disaster areas.
NETL
NSTL
万方数据
