均布荷载作用下钢筋锈蚀深梁受力性能研究

Study on mechanical behavior of corroded reinforced deep beam under uniform load

为研究钢筋锈蚀后对深梁受力性能的影响,开展均布荷载作用下不同钢筋锈蚀率对深梁受力性能以及破坏形态影响的试验研究。设计了3个不同钢筋锈蚀率的深梁试件,通过静载试验加载至失效破坏,分析深梁压杆荷载—扰度关系、荷载—裂缝宽度关系以及荷载—竖向变形关系。试验结果表明,钢筋锈蚀后,深梁压杆承载力及刚度明显降低,失效模式为深梁跨中中部高度处突然出现一个垂直裂纹,然后裂纹分别向顶面和底面延伸,直至最后附近节点的混凝土发生破碎失效。

Experimental research was carried out to study the behaviors and efficiency coefficient of struts with deep beams under uniform load corrosio,to study the influence of reinforcing steel bars on the mechanical behavior of deep beams.Through the static load test,the load disturbance relationship,load crack width relationship and load vertical deformation relationship of deep beam compression bar were analyzed.The test results showed that the bearing capacity and stiffness of the compression bar of the deep beam with the corrosion of steel bars decrease obviously.The failure mode is that a vertical crack suddenly appears at the middle height of the deep beam span,and then the crack extends to the roof and floor surface respectively,until finally the concrete near the joints breaks and fails.