CAJ | 학술논문

为研究地下水浮力对地下建筑结构产生的损伤特征和机理,通过一典型工程实例的结构变形和裂缝原因分析,并结合有限元程序对结构变形和变形后刚度变化的模拟计算,对地下水浮力作用下造成的结构变形机理,混凝土梁、柱、墙裂缝特征,以及对结构安全的影响进行研究.研究结果表明:当地下水浮力超出地下建筑自身重量,地下建筑在浮力作用下产生隆起变形和整体上移的趋势,而在周边挡墙处该上移趋势受土体约束,致使各柱、墙竖向变形不一致,导致结构构件开裂甚至局部破坏.损伤后的结构刚度大大降低.结构的总体损伤程度与平面尺寸相关,并受平面短边尺寸的控制,且结构构件损伤呈现周边大于中部的特征.
위연구지하수부력대지하건축결구산생적손상특정화궤리,통과일전형공정실례적결구변형화렬봉원인분석,병결합유한원정서대결구변형화변형후강도변화적모의계산,대지하수부력작용하조성적결구변형궤리,혼응토량、주、장렬봉특정,이급대결구안전적영향진행연구.연구결과표명:당지하수부력초출지하건축자신중량,지하건축재부력작용하산생륭기변형화정체상이적추세,이재주변당장처해상이추세수토체약속,치사각주、장수향변형불일치,도치결구구건개렬심지국부파배.손상후적결구강도대대강저.결구적총체손상정도여평면척촌상관,병수평면단변척촌적공제,차결구구건손상정현주변대우중부적특정.
In order to study the damage characteristics and mechanism of underground water on underground structure. factors of structure deformation and cracks based on a case study had been investigated. Meanwhile, finite element method had been used to simulate the deformation and decrease of stiffness. And structure deformation mechanism had been investigated, together with cracks characteristics and the effect on the structure's safety. It was found that the underground structure would be swollen up and floated as the float was larger than the structure's weight. And the uptrend of boundary retaining wall was restrained by soil, which made vertical displacements in columns and concrete walls different and resulted in structure cracks and the decrease of structural stiffness. The general structural damage was depended on the plan size and controlled by the short side. And the damage was more serious in central than that in boundary.