高墩桥梁地震响应分析研究

汶川地震震害结果表明，在我国西部山区普遍存在的高墩桥梁震害严重，不少高墩桥梁在高于设防烈度的大震作用下出现了上部结构落梁、桥墩倒塌或压溃等严重破坏，直接影响到抗震救灾工作的顺利开展．因此，应对其抗震设计提出更高要求．通过对一座高墩三跨连续箱梁桥的地震响应进行数值模拟计算，分析了高墩桥梁的地震响应特点，提出了高墩桥梁在大震作用下应采取防止落梁及墩柱压溃破坏的构造措施．

Research of the High-Pier Bridge Earthquake Response

The Wenchuan earthquake showed that damages of high bridge pier is serious in China western mountains,the beam of superstructure is off and the pier collapse when seismic intensity is biger than fortification intensity.The damage impede relief work.So the higher request is advanced during seismic design.In this paper,the seismic response of a high pier three-span continuous box girder bridge is detailed calculated,and the measures that prevent beam down and crushing pillar to damage of the structure in big earthquake is advanced.