型钢混凝土梁抗扭刚度试验研究  

Experimental study on anti-torsion stiffness of steel reinforced composite concrete beam

作　　者：宋志刚[1,2] 李红远[3] 邓波[4] 欧阳小琴[2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]江西农业大学工学院,江西南昌330045 [3]广西工学院鹿山学院土木工程系,广西柳州545616 [4]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《建筑结构学报》2009年第S2期182-190,共9页Journal of Building Structures

基　　金：国土资源部、上海市人民政府联合资助项目([2004]011-02);上海市重点学科(地质工程)建设项目资助(B308)

摘　　要：考虑型钢混凝土构件的截面尺寸、配钢率和型钢保护层厚度、配筋率、混凝土强度等因素,对6根型钢混凝土构件和2根钢筋混凝土构件进行扭转加载试验,研究了型钢混凝土构件的抗扭刚度。分析型钢混凝土纯扭构件和钢筋混凝土纯扭构件扭矩-扭转角曲线可知,型钢混凝土构件受纯扭矩作用下的受力过程可以分为弹性、弹塑性及破坏三个阶段,其中破坏属于延性破坏。将各试件的扭矩-单位扭转角曲线简化,可分别得到弹性阶段和弹塑性阶段的试验刚度。参考并结合钢筋混凝土构件、高强混凝土构件和钢-混凝土组合梁的扭转刚度计算理论和方法,依据本次型钢混凝土构件扭转-变形实测曲线,并考虑了型钢混凝土纯扭构件型钢部分与钢筋混凝土部分的组合作用,建立了型钢混凝土构件扭转刚度的简化计算方法。The steel reinforced composite concrete beam was tested to study the effects of section dimension,steel ratio and protective layer,reinforcement ratio,concrete strength on anti-torsion stiffness with six torsion steel reinforced composite concrete beams and two concrete beams.The torsion moment-torsion angle relationship curve both steel reinforced composite concrete beams and two concrete beams were obtained.The torsion loading process of steel reinforced composite concrete beams can be divided into three stages,which are elastic,elastic-plastic and failure stage,and failure style belongs to ductility.By simplifying the torsion moment-torsion angle relationship curve,test stiffness of elastic,elastic-plastic stage can be gotten.The simplified calculating method of anti-torsion stiffness was suggested based on the torsion stiffness calculating theory and method of concrete beam,high strength concrete beam and steel reinforced composite concrete beam,as well as torsion-deformation testing curve of steel reinforced composite concrete beam,where the composite actions between construction steel and reinforced concrete in the torsion component were taken into account.

关 键 词：型钢混凝土 抗扭刚度 计算方法 

分 类 号：TU398.9[建筑科学—结构工程]