《Soil Dynamics & Earthquake Engineering》刊登“拱坝对地震波离散模型产生的非均匀激发的响应”

作者：Tarinejad, Reza，Fatehi, Roozbeh，Harichandran, Ronald S.

刊物：《Soil Dynamics & Earthquake Engineering》，2013年9月，第52卷，40-54页

关键词：拱坝，非匀速运动，地震波，数值模型，应力集中

摘要：本文基于坝基单一有效记录和地震波散射分析产生非均匀地面运动。采用ChinoHills2008地震在Pacoima大坝的记录来验证此方法的准确性。利用EACD-3D2008软件对Pacoima大坝-水库-基础在匀速和非匀速地面运动作用下的响应进行了动态分析，并将分析结果与大坝不同位置处记录的响应进行比较。研究表明：非均匀刺激下计算和记录的坝体位移比较温和；均匀刺激下计算与记录的结果相比，计算的结果低估了其位移；并存在显著的应力集中，尤其是在基础附近；相比均匀刺激，非均匀刺激获得的应力分布形式有所不同，其中对于均匀刺激，最大应力发生在坝顶附近的拱冠梁处，对于非均匀刺激，最大应力发生在基础边缘和靠近基础处。

Response of an arch dam to non-uniform excitation generated by a seismic wave scattering model

Authors：Tarinejad, Reza，Fatehi, Roozbeh，Harichandran, Ronald S.

Journal：Soil Dynamics & Earthquake Engineering. Sep2013, Vol. 52, p40-54. 15p.

Keyword：Arch dam, non-uniform motion, seismic waves, mathematical models, stress concentration.

Abstract：Non-uniform ground motions are generated based on a single record available at a site and seismic wave scattering analysis. The Chino Hills 2008 earthquake records at the Pacoima Dam site are used to indicate the accuracy of the method. Dynamic analysis of the Pacoima dam-reservoir-foundation under uniform and non-uniform ground motions is carried out using the EACD-3D2008 software, and the results are compared to recorded responses at different locations on the dam. There is good agreement between computed and recorded displacements of the dam for non-uniform excitation. For uniform excitation, the displacements are underestimated in comparison with those obtained from recorded excitation. Significant intensification of stresses, especially near the foundation, and different patterns of stress distribution are observed for non-uniform excitation in comparison with uniform excitation. For uniform excitation maximum stresses occur in the crown cantilever near the crest, but for non-uniform excitation the maximum stresses occur along the sides and near the foundation.

原文链接：https://vpn2.nlc.gov.cn/prx/000/http/web.ebscohost.com/ehost/detail?vid=4&sid=c0f94966-4c68-4815-8e9a-0cb77af093ed%40sessionmgr11&hid=25&bdata=Jmxhbmc9emgtY24mc2l0ZT1laG9zdC1saXZl#db=a9h&AN=89434274