型钢与混凝土的极限粘结强度  

Ultimate Bond Strength of Steel Reinforced Concrete

作　　者：赵根田[1] 李永和[2] 

机构地区：[1]内蒙古科技大学建筑与土木工程学院,包头014010 [2]上海大学土木工程系,200072

出　　处：《建筑结构》2007年第1期68-70,共3页Building Structure

基　　金：内蒙古自然科学基金(200208020212);包头市科技攻关项目(2003B003)

摘　　要：为研究型钢与混凝土的粘结滑移性能,对11根不同截面尺寸、粘结长度、混凝土强度等级、保护层厚度、配箍率的型钢混凝土短柱进行了试验。测量的关键参数是型钢与混凝土之间的粘结应力和滑移。试件在型钢翼缘和腹板上开槽后,粘贴应变片并埋置于混凝土中。试验在长柱试验机上进行,采取线性轴向加载,记录型钢在自由端和固定端的滑移。型钢的粘结长度、混凝土强度等级、混凝土保护层厚度、配箍率是影响粘结性能和粘结强度的主要因素。提出了型钢翼缘和腹板处的粘结应力分布模式和极限粘结强度的算法。To study the bond-slip performance between structural steel and concrete, eleven short columns with the different configuration are tested, such as cross section dimensions, bond length, concrete strength, thickness of concrete cover and the rate of stirrup lateral. Key parameters measured are bond stress and slip between structural steel and concrete. Before the structural steel was encased in concrete, the strain gauges had been plastered in the slots of the flange and the web of structural steel. The specimens undergoing the loads linearly and in the axis had been tested in the press test machine for long column, the slips of structural steel at the free end and the fixed end of specimens are measured and recorded. Four parameters of bond length, concrete strength, thickness of concrete cover and the rate of stirrup lateral, are the main factors affecting the bond behavior and the bond capacity. The distribution mode of bond stress is noted on the flange and the web of structural steel. A formula calculating ultimate bond strength is proposed between structural steel and concrete.

关 键 词：型钢钢筋混凝土 粘结机理 粘结应力 粘结强度 

分 类 号：TU375[建筑科学—结构工程]