【摘要】 本文概述了我国水工建筑物抗震设计规范修编的依据,工程背景,指导思想,主要变动内容及关键问题。阐明了本次修编的必要性和可行性。修编遵循的指导思想为:水工建筑物抗震安全性评价包括地震动输入、结构地震响应、结构抗力三个相互配套部分;"防止遭遇最大可能的极端地震时,发生库水失控下泄、导致严重次生灾害的溃坝灾变"是大坝抗震设计的战略重点。修编中主要变动的内容,包括:增加渡槽、升船机两类建筑物和边坡;对重要大坝按最大可信地震下不发生地震灾变进行校核;对设计烈度7度及以上的1、2级土石坝,同时用有限元法对坝体和坝基进行动力分析,综合判断其抗震安全性;补充了各章的抗震措施;调整个别水工建筑物的结构系数等。对修编中就抗震设防水准框架、设计反应谱、大坝混凝土动态力学特性、土石坝的动力分析等几个关键技术问题,给出了对其进行了专题研究的主要结果、及对其中一些修编规定对不同工程的影响进行了抗震试设计检验的结果。更多还原

【Abstract】 The basis,engineering background,revision principles,major supplemental contents and key revision issues of the Aseismic Design Codes of Hydraulic Structures in China are briefly introduced in this paper.The revision was based on the lessons learnt from recent earthquakes,especially the 2008 Wenchuan earthquake in China,and the requirement of prevent any collapse of high dam under the maximum credible earthquake(MCE)was highlighted.The major supplemental contents are outlined,new chapters for aqueduct,ship lift and engineered slope,fortification level of key dams under MCE with controllable water releasing,and FEM dynamic analysis techniques of embankment dams,etc.On the basis of studies,with trial designs of typical dams under the revised code critical technical issues are discussed in details such as specification of MCE,selection of normalized design response spectra and dam concrete’s dynamic mechanical properties,and the new stipulation for dynamic response analysis of embankment dams.更多还原