水利水电技术
水利水電技術
수이수전기술
WATER RESOURCES AND HYDROPOWER ENGINEERING
2009年
11期
55-58
,共4页
大坝加高%结合面开合%仿真计算%温度应力%混凝土重力坝
大壩加高%結閤麵開閤%倣真計算%溫度應力%混凝土重力壩
대패가고%결합면개합%방진계산%온도응력%혼응토중력패
dam heightening%cracking of interface%simulation calculation%thermal stress%concrete qravity dam
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.
重力壩加高工程中,新老混凝土結閤麵在各種荷載作用下可能會脫開.結閤某重力壩加高工程,利用無厚度接觸麵單元模擬新老混凝土結閤麵,通過三維有限元倣真計算,研究瞭影響新老混凝土結閤麵開裂的多種因素,包括新老混凝土結閤麵的彊度、新混凝土的厚度、保溫措施、分縫措施等,提齣減小新老混凝土結閤麵開裂的工程措施,以增彊大壩的整體性,為以後的重力壩加高提供參攷.
중력패가고공정중,신로혼응토결합면재각충하재작용하가능회탈개.결합모중력패가고공정,이용무후도접촉면단원모의신로혼응토결합면,통과삼유유한원방진계산,연구료영향신로혼응토결합면개렬적다충인소,포괄신로혼응토결합면적강도、신혼응토적후도、보온조시、분봉조시등,제출감소신로혼응토결합면개렬적공정조시,이증강대패적정체성,위이후적중력패가고제공삼고.
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.
