论文部分内容阅读
为研究已震损及未损钢筋混凝土框架采用外包钢套加固后的抗震性能,按照1/2缩尺制作了4榀两层双跨钢筋混凝土框架模型,其中1榀为原型对比框架,1榀直接加固,另外2榀进行不同程度的震损后采用外包钢套法进行加固,最后对所有框架模型进行拟静力试验。试验结果表明,对震损及未损钢筋混凝土框架采用外包钢套法进行合理、可靠加固后,框架结构的承载力有较大程度的提高,并具有良好的塑性变形和耗能能力,震损程度对加固框架的刚度、强度退化以及耗能能力未产生明显影响。从承载力、延性、耗能及对震损的加固修复等方面来看,采用外包钢套加固混凝土框架结构是一种非常有效的抗震加固方法。
In order to study the seismic performance of damaged and un-damaged reinforced concrete frames with steel sheathing reinforced, 4 榀 two-storey double-deck reinforced concrete frame models were made according to ½-foot scale, among which 1 榀 was the prototype comparative frame, 1榀 direct reinforcement, the other 2 榀 varying degrees of damage after the use of steel outsourcing reinforcement method, and finally all the model frame pseudo-static test. The test results show that the bearing capacity of the frame structure is improved to a great extent and the plastic deformation and energy dissipation capacity are good after the reasonable and reliable reinforcement of the damaged and un-damaged reinforced concrete frame by the sheathed steel sheathing method The degree of damage has no significant effect on the stiffness, strength degradation and energy dissipation of the reinforced frame. From the aspects of bearing capacity, ductility, energy consumption and reinforcement and repair of earthquake damage, it is a very effective seismic strengthening method to reinforce concrete frame structure with steel casing.