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小湾拱坝1170 m高程坝肩加固方案研究 被引量:2
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作者 陈利民 张建海 +2 位作者 艾永平 熊远发 张恩宝 《云南水力发电》 2005年第6期33-37,共5页
采用非线性有限元法,对小湾拱坝典型剖面1 170 m高程平切面的加固方案从坝体变位、坝肩岩体应力、坝肩超载安全系数、置换区分载能力四个方面进行研究分析,评价1 170 m高程加固方案的效果。研究结果表明,对小湾拱坝典型剖面1 170 m高程... 采用非线性有限元法,对小湾拱坝典型剖面1 170 m高程平切面的加固方案从坝体变位、坝肩岩体应力、坝肩超载安全系数、置换区分载能力四个方面进行研究分析,评价1 170 m高程加固方案的效果。研究结果表明,对小湾拱坝典型剖面1 170 m高程存在的断层破碎带和蚀变带等地质缺陷,采取用混凝土置换的加固措施,形成了右坝肩纵横交错的“扁担”式混凝土支撑框架、左坝肩“口”字形的混凝土支撑框架加固方案,能够有效提高坝肩的承载能力。 展开更多
关键词 小湾水电站 高拱坝肩 加固方案 超载法 安全系数 承载能力
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高拱坝坝肩岩体变形稳定性的三维数值模拟 被引量:1
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作者 罗选红 《山西建筑》 2009年第34期97-98,共2页
以金沙江上游拟建某水电站高拱坝坝肩为研究对象,应用有限差分程序FLAC-3D对坝肩岩体在天然和荷载后的应力、变形和破坏的发展特征模拟分析,重点分析了坝肩岩体在正常工程荷载下的变形稳定性及坝肩超载特性,得到了坝肩岩体的变形破坏特... 以金沙江上游拟建某水电站高拱坝坝肩为研究对象,应用有限差分程序FLAC-3D对坝肩岩体在天然和荷载后的应力、变形和破坏的发展特征模拟分析,重点分析了坝肩岩体在正常工程荷载下的变形稳定性及坝肩超载特性,得到了坝肩岩体的变形破坏特征及超载安全系数。 展开更多
关键词 拱坝 变形稳定 整体超载稳定性 FLAC-3D数值模拟
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A finite element approach for seismic design of arch dam-abutment structures 被引量:1
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作者 YANG Qiang LENG KuangDai LIU YaoRu 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第3期516-521,共6页
We present a 3-D finite element (FE) approach to find the optimal distribution of seismic reinforcement force to secure high arch dam-abutment structures against certain earthquake actions. Nonlinear FE time history a... We present a 3-D finite element (FE) approach to find the optimal distribution of seismic reinforcement force to secure high arch dam-abutment structures against certain earthquake actions. Nonlinear FE time history analysis is performed on the structure to find the seismic responses, using the associated elastic-perfectly plastic material description. The concept of plastic complementary energy is introduced to structural dynamics to quantify the structure's resistance against the seismic action throughout the time history and to indicate the critical moments when extreme extents of dynamic failure occur. Meanwhile the distributions of the unbalanced force at these critical moments reveal the dominant patterns of the dynamic failure. By the principle of minimum plastic complementary energy, the unbalanced force is just the counterforce of optimal reinforcement force to secure the self-unsupportable structure against the earthquake, which makes the seismic design more targeted and effective. Seismic design analysis is performed on Maji high arch dam-abutment structure. The results could to a large extent guide the seismic design, showing that several structural surfaces lying at the upper abutment are the most seismically vulnerable. This application indicates good applicability of this approach to large-scale projects. 展开更多
关键词 EARTHQUAKE arch dam ABUTMENT finite element
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