面板堆石坝振动模型试验及动力分析研究

本文对混凝土面板堆石坝振动台模型试验及动力分析研究的有关成果及存在问题进行了分析和评述, 报导了我国"九五"国家重点科技攻关专题"强震区面板坝大型振动台模型试验及动力分析"研究中所取得的主要成果和进展; (1)进行了大量面板坝振动模型试验, 考虑了模型设计中的多项影响因素, 研究了各项因素对试验结果的影响, 得到了模型坝的各项地震反应性状: (2)研制了面板坝三维有效应力非线性动力分析方法和计算程序, 并通过模型试验进行了验证; (3)采用割线模量的概念统一静、动力反应和地震残余变形分析, 开发了等效线性动、静力耦合计算方法和程序; (4)采用等效线性方法对不同模型坝和不同试验方案进行了地震动力反应分析, 将计算结果与模型试验结果相对,比验证和改进了等效线性分析方法: (5)根据静、动力特性试验结果, 探讨了小变开下高、低应力状态土石料应力-应变关系存在相似性, 并推导了大型振动台模型试验的相似律;(6)将经过模型试验验证和改方法及程序用于具体工程的抗震设计, 得出了一些有理论和实际使用价值的结论, 并提出了有效的抗震工程措施.

Advancement of technology on shaking table model test and dynamic analysis of CFRD

The advancements of the technology in seismic model test on shaking table and dynamic analysis for CFRD in China is reported. 1. New findings on seismic response behaviors of model dam and the main factors affecting the test results. 2. The 3-D effective stress authentic nonlinear dynamic analysis method and calulation program and the verification by model test data. 3. The equivalent linear static-dynamic coupling analysis method and computation program based on the concept of secant modulus, with which the analysis of static, dynamic and seismic residue deformation response can be integrated in the calculation. 4. The improvement of equivalent linear analysis method for computing the seismic response of model dam according to the model test data. 5. The similarity of soil stress-strain relation-ship under the condition of high or low stress, on the basis of model test. 6. applicatons of new findings ot aseismic designs of hydro projects.