无粘结钢绞线体外预应力加固技术  

External Prestressing Reinforcement Technology for Unbonded Steel Strands

作　　者：张涛 齐玮 王文孜 尹海洋 秦天庆 季长征 Wang Wenzi;Zhang Tao;Qi Wei

机构地区：[1]山东省建筑工程质量检验检测中心有限公司 [2]山东省建筑科学研究院有限公司,250031 [3]山东建科特种建筑工程技术中心有限公司

出　　处：《工程机械》2024年第8期169-172,I0018,共5页Construction Machinery and Equipment

基　　金：山东省住房和城乡建设厅科技项目计划《高载荷作用下剪力墙混凝土整体置换技术研究与实践应用》(2021ZD006);《复杂结构建造智能监测和安全预警研究与示范》(2021ZD005)。

摘　　要：无粘结钢绞线体外预应力加固是一项主动式加固技术,可以大大提高受弯构件的承载力和刚度,在老旧厂房加固中有着广泛应用。通过介绍无粘结钢绞线体外预应力加固技术的原理,详细论述该项技术的优点;通过一个工程案例,引出需要解决的加固问题;通过一步步解决钢绞线截面积的计算、预应力值的确定等问题,给出切实可行的无粘结钢绞线体外预应力加固施工方案,有效地解决了问题,对类似工程具有一定的参考价值。External prestressing reinforcement for unbonded steel strands is an active reinforcement technology,which can greatly improve the bearing capacity and stiffness of bending components and is widely used in the reinforcement of old factory buildings.By introducing the principle of external prestressing reinforcement technology for unbonded steel strands,the advantages of this technology are discussed in detail.Through an engineering case,the reinforcement problems to be solved are introduced.By solving the problems step by step,such as calculation of the crosssectional area of steel strands and determination of the prestressing value,a practical and feasible construction plan for external prestressing reinforcement of unbonded steel strands is provided,which solves the problems effectively and has certain reference value for similar projects.

关 键 词：无粘结钢绞线 体外预应力 加固 

分 类 号：TU746.3[建筑科学—建筑技术科学]