预应力部分外包钢混凝土梁基于延性的预应力张拉计算  

Caculation of post-stressed tension on prestressed partially encased composite beams based on the ductility

作　　者：张鹏[1] 沈民合 邓宇[1] ZHANG Peng;SHEN Minhe;DENG Yu(Department of Civil Engineering and Architecture,Guangxi University of Science and Technology,Liuzhou 545006,China)

机构地区：[1]广西科技大学土木建筑工程学院,广西柳州545006

出　　处：《混凝土》2018年第8期6-9,12,共5页Concrete

基　　金：国家自然科学基金资助项目(51568008);中国博士后科学基金项目(2017M613273XB);广西自然科学基金项目(2015GXNSFAA139263)

摘　　要：预应力部分外包混凝土梁是一种预应力新型结构,基于梁截面延性对这种新型预应力混凝土梁在不同张拉控制应力下进行有效预应力推算。试验包括1根未施加预应力的普通组合梁,3根施加不同张拉控制应力的预应力组合梁,通过施加不同张拉控制应力,来研究单调荷载作用下预应力部分外包钢混凝土梁的曲率延性,依据平截面假定和材料的应力-应变关系,进而提出了这种新型复合筋混凝土梁在设定延性值的前提下进行预应力张拉的推算。最终的理论推导与试验结果适用性良好。Prestressed partially encased composite beams is a new type of prestressed structure.Based on the beam cross section ductility of this new type of prestressed composite beams under different tension control stress effectively prestress calculation,The experimental study consisted of a conventional composite beam withoutprestressed,and three prestressed composite beams with different tension control stresses.by applying different stress of prestressed tensioning and control,to study the curvature ductility of the prestressed partially encased composite beams in the monotonic loading,on the basis of flat section assumption and the stress-strain relationship of materials,and then puts forward the new type of composite reinforced concrete beam in ductility values under the premise of prestressed tension calculation.The theoretical derivation and experimental results are in good applicability.

关 键 词：预应力 型钢混凝土梁 曲率延性 试验 

分 类 号：TU528.01[建筑科学—建筑技术科学]