外包混凝土加固轴心受压钢柱正截面承载力试验与理论研究

Experiment and Theoretical Study on Normal Section Bearing Capacity of Axial Compression of Enclosed Steel Reinforced Concrete

为了研究外包混凝土加固轴心受压钢柱的正截面承载力,基于试验和已有文献探讨了不同的初始负载、不同外包混凝土强度和不同核心型钢强度对外包混凝土加固轴心受压钢柱承载力的影响,同时基于钢筋混凝土轴心受压构件的破坏模式对加固后构件的受压破坏全过程和构件裂缝出现及发展进行了描述.最后采用系数修正法对已有的型钢混凝土正截面承载力的计算公式进行修正,从而得出外包混凝土加固轴心受压钢柱正截面承载力的计算公式,并通过试验结果与计算结果的分析比对验证公式的正确性.

In order to study the normal section bearing capacity of axial compression of enclosed steel reinforced concrete,based on the experiment and documents,the normal section bearing capacity of axial compression of enclosed steel reinforced concrete under different initial axial compressive load, different concrete strength and different steel strength are researched.The process of component damage and the development of component cracks based on the damage modes of reinforced concrete under axial compression are described.The normal section bearing capacity formula of the axial compression of enclosed steel reinforced concrete is deduced after amending the existing formula of normal section bearing capacity of steel reinforced concrete.And the rationality of the formula is verified by analyzing and comparing the test results and calculation results.