【作者】 刘闯； 王连广； 吕月；

【Author】 LIU Chuang WANG Lian-guang LU Yue 1.College of civil engineering,Shenyang Jianzhu University,shenyang 110168,china; 2.Research institute of structural engineering Northeastern University,shenyang 110004,china

【机构】 沈阳建筑大学土木工程学院； 东北大学结构工程研究所；

【摘要】 外包钢混凝土结构具有构造简单、连接方便、使用灵活、承载力高及延性好等优点,但作为受弯构件,其抗裂性能及抗弯刚度等优势不是很明显.对其施加预应力,形成预应力外包钢混凝土结构,可以进一步提高构件的承载能力,增加其抗弯刚度,提高其抗裂性能,增加其耐久性.分析预应力外包钢混凝土 T 型受弯构件结构及受力特点,以外包钢钢屈服、受压混凝土是否达到极限应变值及预应力钢筋是否屈服为条件,将预应力外包钢混凝土受弯构件的破坏模式归纳为四种,分别按中和轴在翼缘和腹板两种情况,给出其相应抗弯承载力理论计算公式.更多还原

【Abstract】 Steel -encased concrete structure has many advantages,such as the simple construction,convenient links,flexible use,high bearing capability and well durability etc,but the advantage of cracking performance and bending stiffness as flexural member is obscure.Prestressing it to form prestressed steel-encased concrete structure can improve above shortages.Analyzing the T-beam structure and bearing characteristics,four failure modes were included according to steel corner yielding,strain of compressive concrete reaching extremum and tendon yielding or not,furthermore bend -bearing capacity calculation formulas considering neutral axis in dif- ferent position were established.更多还原