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单层厂房中支承屋架或屋面梁的钢筋混凝土柱牛腿,如设计时未考虑水平地震力的作用,或考虑不够,则在地震时易遭破坏,故须进行加固。本研究中采用了两类加固方法。一是用型钢套加固,一是用外包钢筋混凝土加固。试验征明,牛腿采用上述方法加固后,其抗裂度、强度和变形能力均有不同程度的提高。文中对上述两种加固方案并提出了计算方法。
In a single-storey factory building, reinforced concrete pillars supporting roof trusses or roof beams, if they are designed without considering the effect of horizontal seismic forces, or considered inadequate, are easily damaged during an earthquake and must be reinforced. Two types of reinforcement methods were used in this study. One is reinforced with steel jackets and the other is reinforced with outsourced reinforced concrete. The test showed that after the cattle legs were reinforced by the above methods, their crack resistance, strength and deformability were improved to varying degrees. In the paper, the above two reinforcement schemes are proposed and the calculation methods are proposed.