面板堆石坝混凝土面板配筋计算方法研究  

Reinforcement calculation of concrete slab in concrete faced rockfill dams

作　　者：魏匡民[1,3] 周恒 米占宽[1,3] 李国英[1,3] 邓曌 WEI Kuangmin;ZHOU Heng;MI Zhankuan;LI Guoying;DENG Zhao(Nanjing Hydraulic Research Institute,Nanjing 210024,China;Northwest Engineering Corporation Limited,Xi'an 710065,Chian;Key Laboratory of Reservoir and Dam Safety of the Ministry of Water Resources,Nanjing 210029,China)

机构地区：[1]南京水利科学研究院,江苏南京210024 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [3]水利部水库大坝安全重点实验室,江苏南京210029

出　　处：《岩土工程学报》2023年第6期1314-1322,共9页Chinese Journal of Geotechnical Engineering

基　　金：国家重点研发计划(2021YFC3090100);中央级公益性科研院所基本科研业务费项目(Y322003,Y320005);国家自然科学基金项目(52109094);江苏省水利科技项目(2018019)。

摘　　要：混凝土面板应力变形安全是面板堆石坝工程的关键,然而传统面板坝分析方法大多未考虑面板的配筋效应,实际面板配筋方案制定缺乏理论依据。提出了基于限裂理念的混凝土面板配筋计算方法:采用非协调网格计算技术精细模拟混凝土面板应力,采用钢筋埋置单元模拟钢筋加固作用,采用损伤模型模拟混凝土材料损伤开裂行为,通过引入与几何尺寸、钢筋应力相关的裂缝宽度公式实现混凝土面板限裂配筋计算。提出的方法可定量研究面板限裂配筋,为复杂条件下面板坝配筋设计提供理论依据。文中以正在施工建设的大石峡特高面板坝为例,初步研究了该坝的面板配筋方案。The stress and deformation safety of the concrete slab is crucial to the concrete faced rockfill dams(CFRDs),however,most of the traditional methods do not consider the effects of the reinforcement in slab,therefore,the calculated results can not provide enough information to the design of slab reinforcement.In this study,a method for calculating the slab reinforcement based on the concept of crack width limit is proposed:the non-coordinated grid computing technology is used to refinedly simulate the stress of the concrete slab,the embedded steel element is used to simulate the reinforcement effects,and the damage model is used to simulate the cracking of the slab concrete.By introducing a formula for crack width related to geometric size and rebar stress,and setting the crack width limit,the reinforcement calculation is realized.The proposed method can be used to quantitatively study the slab reinforcement and provide a theoretical basis for reinforcement design under complex conditions.The Dashixia CFRD under construction is taken as an example and its slab reinforcement design is preliminarily studied.

关 键 词：面板堆石坝 有限元 面板配筋计算 精细模拟 损伤模型 

分 类 号：TU43[建筑科学—岩土工程] TV641[建筑科学—土工工程]