体外预应力技术及其在板结构加固中的应用研究  

Prestressed Vitro Thechnology and its Board in the Structural Strengthnig of the Applied Research

作　　者：孙蔚[1] 

机构地区：[1]东南大学,南京210096

出　　处：《工程建设与设计》2007年第8期27-29,共3页Construction & Design for Engineering

摘　　要：提出将体外预应力技术用于板的加固,并对其进行了试验研究。通过对5块RC简支双向板的体外预应力加固试验,研究了预应力钢筋的张拉控制力及其布筋型式对双向板受力性能的影响。试验研究表明,体外预应力可有效地改善双向板的受力性能,提高其极限承载能力,在双向板的跨中区段布置体外预应力钢筋时对双向板的加固效果最佳。The method to strengthen RC slabs used externally prestressed was presented.Bbased on the tests of five pieces of simply supported two-way slabs strengthened by one-way external prestressing, the effects of different initial stresses and layouts of tendons on the behaviours of slabs were studied. Experimental results showed that external prestressing improved the behaviours of two-way slabs greatly, increased the ultimate bearing capacity of slabs, and the layout with dense tendons in the midst of slab was more efficient.

关 键 词：体外预应力 板结构 加固 承载力 

分 类 号：TU757[建筑科学—建筑技术科学]