基于荷载传递试验探讨预应力混凝土锚固区裂缝扩展  

作　　者：蒋业东 左海宁 胡翔 余绍霖 

机构地区：[1]柳州欧维姆机械股份有限公司,广西柳州545006

出　　处：《科技创新与应用》2024年第20期70-73,共4页Technology Innovation and Application

基　　金：柳州市科技计划项目重大专项(2022AAC0101)。

摘　　要：为研究长方形和圆形承压区域对后张预应力混凝土锚固区裂缝扩展的影响,分别对2种混凝土构件进行荷载传递试验。试验表明,随着荷载逐渐增加至破坏荷载,受拉荷载向受压区转移,无论是长方形或圆形承载面锚固区结构,承压区周围混凝土表面均出现由中心指向构件四角较粗的裂缝,粗裂缝的扩散角度约45°;试件的侧面微裂缝逐渐增宽,并且随外荷载的增加向锚固区截面高度1/2的位置扩展。In order to study the influence of rectangular and circular bearing areas on crack propagation in post-tensioned prestressed concrete Anchorage zone,load transfer tests were carried out on two kinds of concrete members.The test results show that with the gradual increase of the load to the failure load,the tensile load transfers to the compression zone,no matter the Anchorage zone structure with rectangular or circular bearing surface,there are cracks on the concrete surface around the bearing zone,which are thicker from the center to the four corners of the members,and the diffusion angle of the coarse crack is about 45°.The side micro-crack of the specimen gradually widens and expands to the position of 1/2 of the section height of the Anchorage zone with the increase of external load.

关 键 词：预应力混凝土 荷载传递 锚固承载面 裂缝 锚垫板 

分 类 号：TU378[建筑科学—结构工程]