预应力加固法在土木工程中的研究应用  

Researches and applications of prestressed strengthened methods in civil engineering projects

作　　者：刘丽娜 王伟超[2] 丁亚红[2] 

机构地区：[1]焦作市职业教育中心学校,河南焦作454003 [2]河南理工大学土木工程学院,河南焦作454003

出　　处：《混凝土》2012年第4期115-118,共4页Concrete

基　　金：国家自然科学基金(5110861);河南省重点学科项目(509919)

摘　　要：对各种预应力加固法的研究及其应用进行了描述,包括预应力纤维复合材料片材、筋材、布材加固法及预应力拉杆加固法、预应力高强钢丝绳加固法、预应力钢绞线加固法、内嵌预应力螺旋肋钢丝加固法,这些加固方法能显著的改善原结构的受力,有效延迟裂缝的开展,限制裂缝的宽度,提高结构的承载力,增大结构的抗变形能力。The prestressed strengthened methods were widely used in civil engineering projects.These strengthening material include kinds of prestressed fiber reinforced polymer/plastic,high strength steel wire rope,steel strand and spiral rib steel wire.The experiment research,reinforcement effect and engineering application of these strengthening materials and its methods were reviewed in detail.All the strengthened methods can limit the crack width,reduce the midpoint deflection,and improve the stressing performance of the strengthened beams.

关 键 词：混凝土结构 预应力 加固 

分 类 号：TU528.01[建筑科学—建筑技术科学]