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我国农村,由于建筑材料及经济条件的限制,现有的大多数房屋没有经过正规的设计和施工,更谈不上抗震设防,因此房屋的抗震性能很差。一旦遭遇五级地震房屋就会有倒塌,若遇六、七级地震房屋倒塌就更多了。建国以来,我国发生了20余次七级以上地震,每次农村都遭受到很大损失。1979年江苏溧阳六级地震,该县房屋倒塌15万余间,部分倒塌12万余间,严重破坏12万余间,使农村在经济上遭受很大损失。逐步提高农村房屋抗震能力是非常重要的问题。
In China’s rural areas, due to the restrictions on construction materials and economic conditions, most of the existing houses have not undergone formal design and construction, let alone seismic fortification. Therefore, the seismic performance of houses is very poor. Once a five-grade earthquake occurs, the house will collapse, and if the earthquakes at the magnitudes 6 and 7 collapse, it will be even more. Since the founding of the People’s Republic of China, more than 20 earthquakes of magnitude 7 or above have occurred in our country, and every time in rural areas, great losses have been suffered. In the 1979 Jiangsu Sixth Earthquake, the county collapsed more than 150,000 houses, partially collapsed more than 120,000 rooms, and severely damaged more than 120,000 rooms, causing great economic losses to the countryside. Gradually increasing the earthquake resistance of rural houses is a very important issue.