地下室上浮破坏力学特征分析
Mechanical Characteristics Study on Floating Damage of Basement
刘玉涛 1王理军 1黄杰卿2
作者信息
- 1. 中天建设集团有限公司,杭州 310020
- 2. 浙江大地勘测设计有限公司,杭州 310030
- 折叠
摘要
地下室上浮事故屡见不鲜,但对于其破坏机理及力学特征的研究较少.本文用有限元软件建立三类典型的空间模型,对比上浮工况与设计工况下结构内力的变化.结果表明:地下室上浮后梁柱内力发生较大变化,导致梁柱产生众多水平裂缝和斜裂缝;裂缝在靠近主楼部位的地下室结构出现较多,在地下室上浮中心区域出现较少;梁柱斜裂缝底端指向上浮中心区域;基础所受冲切力增加,冲切破坏可能性增大.地下室上浮后,可根据破坏特征推断上浮中心区域,也可据此采取针对性的处理措施.
Abstract
Floating accidents in basements is very common.However,few studies are carried on the failure mechanisms and mechanical characteristics of floating basements.By using finite element software,three types of typical spatial models are established to compare the structural internal forces under floating and design conditions.It is shown that the internal forces of beams and columns change greatly when the basement floats.This results in many horizontal and oblique cracks of beams and columns.More cracks appear on the basement structures near the main building,while fewer cracks appear on the basement structures in the floating central area.The lower ends of the oblique cracks in beam and columns point to the floating central area.As the punching force on the foundation increases,the possibility of punching failure increases.According to the failure characteristics,the floating central area can be inferred and targeted treatment measures can be taken after the basement floats.
关键词
地下室/上浮/破坏机理/力学特征Key words
basement/float/failure-mechanism/mechanical characteristic引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据