某原料筒仓框架柱裂缝原因分析  

Cracking Reason Analysis for Columns in Raw Material Silo

作　　者：李彦辉 郭治 安国旗 王少军 Li Yanhui;Guo Zhi;An Guoqi;Wang Shaojun(Hebei Province Center for Building Quality Inspection Co.,Ltd.,Shijiazhuang 050021,China;Hebei Building Research Technology Co.,Ltd.,Shijiazhuang 050021,China;Qinhuangdao Construction Project Quality Supervision Station,066000,China)

机构地区：[1]河北省建筑工程质量检测中心有限公司,石家庄050021 [2]河北省建筑科学研究院有限公司,石家庄050021 [3]秦皇岛市建设工程质量监督站,066000

出　　处：《特种结构》2020年第6期42-47,共6页Special Structures

摘　　要：为查明某筒仓底部承重框架柱顶端裂缝产生的原因,对筒仓的外观质量缺陷、框架柱、梁混凝土强度、配筋、垂直度进行了现场检测,并对筒仓进行了载荷试验。通过荷载试验和承载力计算,分析了外加荷载对裂缝的影响。计算分析了温度作用下框架柱的轴力和弯矩,以及风荷载作用下弯矩,并与恒荷载作用下的轴力和地震作用下的弯矩进行了对比,结果表明:温度变化对框架柱的内力变化影响较大;风荷载作用对内环框架柱顶弯矩影响较小。综合分析认为,温度变化产生的应力是裂缝产生的主要原因,风荷载作用对裂缝的产生和发展具有不利影响。In order to investigate the cracking reason of the frame column at the bottom of the silo the appearance defects of the silo the strength of the frame column the concrete of the beam the reinforcement and the verticality of the frame column were in-site tested and the load test was carried out.The effect of external load on cracks was analyzd through load test and bearing capacity calculation.The axial force and bending moment of frame column under temperature action and the bending moment under the wind load were calculated and analyzed.They were compared with the axial force under constant load and the bending moment under earthquake action.The results showed that the temperature change has a great influence on the internal force of frame column.Wind load has little effect on the bending moment at the top of the inner ring frame column.It was considered that the stress caused by temperature change is the main cause of cracks and the effect of wind load has a negative effect on the generation and development of cracks.

关 键 词：筒仓 裂缝 温度作用 载荷试验 

分 类 号：TU375[建筑科学—结构工程] TU312.3