| 重力坝加高中新老混凝土结合面开合若干问题探讨 |
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| 引用本文： | 郭传科,杨波,张国新.重力坝加高中新老混凝土结合面开合若干问题探讨[J].水利水电技术,2009,40(11). |
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| 作者姓名： | 郭传科 杨波 张国新 |
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| 作者单位： | 中国水利水电科学研究院,北京,100038 |
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| 基金项目： | "十一五"国家科技支撑计划南水北调工程若干究与应用，国家自然科学基金资助项目，水利公益行业科研项目"混凝土高坝安全评估方法研究及技术开发" |
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| 摘 要： | 重力坝加高工程中,新老混凝土结合面在各种荷载作用下可能会脱开.结合某重力坝加高工程,利用无厚度接触面单元模拟新老混凝土结合面,通过三维有限元仿真计算,研究了影响新老混凝土结合面开裂的多种因素,包括新老混凝土结合面的强度、新混凝土的厚度、保温措施、分缝措施等,提出减小新老混凝土结合面开裂的工程措施,以增强大坝的整体性,为以后的重力坝加高提供参考.
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| 关 键 词： | 大坝加高 结合面开合 仿真计算 温度应力 混凝土重力坝 |
Discussion on cracking problems of interface between fresh and old concretes during heightening of concrete gravity dam |
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| GUO Chuan-ke,YANG Bo,ZHANG Guo-xin.Discussion on cracking problems of interface between fresh and old concretes during heightening of concrete gravity dam[J].Water Resources and Hydropower Engineering,2009,40(11). |
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| Authors: | GUO Chuan-ke YANG Bo ZHANG Guo-xin |
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| Abstract: | Based on the heightening of a concrete gravity dam, many factors affecting the cracking of the interface between the fresh concrete and old concrete, such as the strength of the interface, the thickness of fresh concrete, thermal insulation measures for concrete, joint-setting measures, etc. are studied herein by simulating the interface between the fresh and old concretes with zero thickness interface element through 3-D FEM simulation; from whieh the engineering measures to decrease the cracking between fresh and old concretes are proposed, so as to enhance the integrity of the dam concerned and then also provide some references for the similar projects in the days to come. |
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| Keywords: | dam heightening cracking of interface simulation calculation thermal stress concrete qravity dam |
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