摘要
本文应用断裂力学理论,对粘钢混凝土结构裂缝的开展过程中,钢板、钢筋、混凝土的应力、应变发展变化进行了分析。提出了与钢筋混凝土传统理论不尽相同的裂缝机理;指出了混凝土中的裂缝是由其尖端应力场的能量积累、释放、传递而扩展的变化规律,给出了钢板、钢筋有效约束区的定义;提出了钢筋混凝土结构粘钢加固的设计思路。
The development and change, of stresses and strains of steel plate, reinforcement and reinforced con-crete are analyzed during the spreading process of the cracks of concrete structures adhered by steel plate. The cracking mechanism which is different from the traditional RC theory is proposed and that the cracking in concrete is a spreading change regularity of the accumulation, release and transfer of energy in the peak stress field is pointed out, The definition of effectively restricted area of the steel plate, rein-forcement is given. Furthermore, the thought train of design for RC structures adhered by steel plates is also proposed.
关键词
钢筋混凝土
粘接
构件加固
裂缝
plasticity
energy release
relaxauon of stress
