摘要
研究含横缝碾压混凝土拱坝工作状态。含横缝碾压混凝土拱坝未灌浆前若出现洪水强迫蓄水，横缝或诱导缝在施工末期（汛前）灌浆，由于蓄水后坝体进一步降温重新拉开灌浆缝都会破坏拱坝整体性。当缝宽不大时（＜０．５ｍｍ），在水压自重作用下梁向变位加大，可将部分拱重新压紧，形成应力重新分布。作者用体积向量提高简化计算中缝的变形场精度。坝踵水平裂缝出现后，拱作用逐渐加大，梁向大变位和接触形成新拱可使水平裂缝停止扩展。
Study on the operational behavior of RCC(roller compacted concrete) arch dam with transverse joints is given in this paper. The passive storage of flood before grouting the joints and artificial conducted joints caused by the cooling effect after ponding reservoir during the end of construction will destroy the integrity of the arch dam. When width of opening joints is less than 0. 5mm, large deformations of these separated cantilevers due to water pressure will be reunited as partial arch and bring the stress-redistribution to the arch dam. The conception of volume vector is introduced to keep high precision in simplified calculation of joint deformation. The action of arch is enlarged gradually after the horizontal cracks happened at the heel of cantilever. The new arch formed by large deformations and contact of cantilevers may cause to cease the propagation of horizontal cracks, but water pressure rises in upstream crack will bring an unfavorated results to the dam.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1996年第1期20-26,共7页
Journal of Tsinghua University(Science and Technology)
关键词
应力重分布
拱坝
碾压混凝土坝
变形
RCC arch dam
stress redistribution
volume vector
transverse joint
