关键词: 芦山地震, 震害, 应急科考

Abstract:

At two past eight a.m.on April 20,2013,an earthquake measured 7.0 in Richter scale,whose focal depth is 13km deep,hit Lushan County(30.3 degrees north,103.0 degrees east)of Yaan City of Sichuan Province and caused 196 deaths. After the quake,China Earthquake Administration declared a first-grade emergency response. Though Lushan County has a larger population than Yushu County,the casualties caused by Lushan earthquake are far fewer than that caused by Yushu earthquake of the same size. The quake-affected area had also been hit by Wenchuan earthquake. After Wenchuan earthquake,most of the damaged houses in Lushan County were reinforced or directly pulled down and thus newly-built buildings make up a high proportion. The seismic performance of the newly-built rural houses is largely improved due to the various anti-seismic measures. As a result,few of them were totally collapsed in Lushan earthquake,which is the key reason of comparatively fewer casualties. However, the newly-built rural buildings failed to strictly meet the national anti-seismic requirements issued after Wenchuan earthquake, brought heavier damage than it should be. The goal of the first phase of earthquake disaster mitigation is to reduce casualties,and we made it in Lushan earthquake. But the rural buildings with fewer anti-seismic measures for earthquake mitigation were heavily damaged in Lushan earthquake and we still have a lot to do for the goal of property loss reduction.

Key words: Lushan earthquake, earthquake hazard, emergency scientific research