【摘要】 通过对直径为8 mm、12 mm1、6 mm 500 MPa钢筋各4根进行拉伸试验和9个150 mm×150 mm×450 mm的小棱柱进行轴压短柱试验.结果表明:实测屈服强度均超过500 MPa,均匀伸长率均达到10%以上,延性较好.轴心受压短柱的承载力可按现行规范规定的公式计算,当钢筋的抗压强度取值为450 MPa时,试验破坏轴力与计算值的比值均在1.0以上,有较好的安全储备.配置500 MPa级钢筋的轴压短柱受力性能良好,钢筋和混凝土的强度均能得到较好的发挥.更多还原

【Abstract】 The tension experiment is carried out to different diameters 8 mm,12 mm,16 mm of 500 MPa bars and the axle loaded is tested by the nine reinforced concrete puncheons.The test results show:the real yield strength exceeded 500 MPa and the average elongation reach ten percent,and it proves that the ductility is good.The bearing capacity of axis-pressed short column can be calculated according to Code Formula in use,The calculation aixs load is more than the test load when the compressive strength of the bars is 450 MPa,the safety stock is better.The mechanical property of axle loaded puncheons used 500 MPa bar are good,and the high strength of 500 MPa steel bar and concrete strength could be fully exploiteld.更多还原