北京国贸三期工程高含钢率型钢混凝土异型柱试验研究

Experimental study on the irregular shaped steel reinforced concrete columns of the China World Trade Center Phase Ⅲ in Beijing

以北京国贸三期实际工程为背景,对其核心筒中型钢混凝土异型组合柱进行试验研究。这种柱含钢率高,型钢造型复杂,是一种新型构件。通过对这类构件的轴压、压弯和剪切试验,全面研究构件相应的破坏特征、承载力、滞回性能和延性,并对比研究型钢分散配置后不同连接方式以及不同轴压比的影响。研究表明,这类构件性能良好,且连接板的设置与轴压比大小对性能有直接影响,设计时应予以充分的考虑。通过试验研究提出高含钢率型钢混凝土柱抗剪及压弯承载力计算方法,其计算结果与试验结果符合较好。

For China World Trade Center Phase III in Beijing,axial compression test,shear test,and compound axial and bending test were carried out for high steel ratio and irregular shaped SRC（steel reinforced concrete） columns.The failure mode,capacity,ductility and hysteretic performances were studied.Different steel junction methods and axial compression ratios were compared.The results showed that the high steel ratio SRC columns provided good ductility,which was directly affected by the junction method and the axial compression ratio.Design formulas for shear capacity and compound axial and bending capacity of high steel ratio SRC columns were proposed and the calculations matched the test results satisfactorily.