采用有限元法的某已建双悬臂梁式渡槽结构分析  

Structure Analysis of a Built Double Cantilever Beam-type Aqueduct by Finite Element Method

作　　者：程子悦 渠元闯 彭振辉[2] 燕家琪 王庆 Cheng Ziyue;Qu Yuanchuang;Peng Zhenhui;Yan Jiaqi;Wang Qing(North China Municipal Engineering Design ＆ Research Institute Co., Ltd., Tianjin 300074, China;Tianjin University, 300072, China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300074 [2]天津大学,300072

出　　处：《特种结构》2018年第3期71-74,共4页Special Structures

摘　　要：本文通过对某已建双悬臂梁式渡槽的结构有限元分析,为渡槽加固提供决策依据。以某已建双悬臂梁式渡槽为例,采用有限元法对渡槽进行了结构和裂缝扩展趋势计算分析。渡槽结构混凝土主拉应力分析结果表明,渡槽侧壁在支座位置可能出现贯通裂缝,扩展有限元裂缝分析表明渡槽现状裂缝有不断扩展的趋势,与渡槽实际运行情况较为吻合。根据分析成果,得出了渡槽侧壁构造配筋不足可能是长期运行条件下产生裂缝和不断发展的结论,并建议尽快进行加固处理,为工程决策提供了依据。FEM was used to analysis the structure of a built double cantilever beam-type aqueduct in this paper, which can provide decision-making for the aqueduct reinforcement. The double cantilever beamtype aqueduct structure and crack growth trend were analyzed by FEM and XFEM. The analysis results of concrete principal tensile stresses showed that penetrating cracks maybe arise on the side wall of the aqueduct bearing position, and the analysis results of XFEM showed that the cracks were expanding, which were agreement with the actual situation of the aqueduct. According to the analysis results, it was concluded that the lack of distributed reinforcement of the side wall maybe cause cracks and constantly expanding after long-term operation, and the strengthening treatment of the aqueduct structure should be adopted as soon as possible.

关 键 词：有限元 梁式渡槽 裂缝 

分 类 号：TV672.3[水利工程—水利水电工程]