- 黃 波1，張 亮2，翟江棚3
2021年第10期
摘要
引用本文
摘 ? 要：研究了不同再生骨料替代率下，不銹鋼管與鋼纖維增強再生混凝土組合柱的軸壓性能，獲得了試件的破壞形態、荷載-位移曲線和軸壓剛度。結果表明：根據荷載-位移曲線的變化特征，可將試件按承載力穩定性分為不穩定和穩定兩類；不穩定試件峰值荷載后的荷載-位移曲線快速探底，此后荷載開始緩慢提升，軸向變形快速增大；穩定試件峰值荷載后的荷載-位移曲線沿水平方向發展，試件的持荷能力突出；試件的軸壓剛度在0.3~0.9倍的峰值荷載時達到最大，此時鋼與混凝土的材料損傷相對較小，鋼管對混凝土的約束效應相對有效；隨著再生骨料替代率的增大，試件的軸壓剛度逐漸降低；鋼纖維抑制了裂縫的發展，維護了混凝土的整體性，從而提高了試件的軸壓剛度。
Abstract： The axial compression performance of stainless steel pipe and steel fiber reinforced recycled concrete composite columns with different recycled aggregate replacement rates was studied, and the failure mode, load-displacement curve and axial compression stiffness were obtained. The results show that according to the characteristics of load-displacement curve, the specimens can be divided into unstable and stable types according to the bearing capacity stability. The load-displacement curve of the unstable specimen after the peak load quickly reaches the bottom, after which the load starts to increase slowly, and the axial deformation increases rapidly. The load-displacement curve of the stable specimen ?after the peak load develops in the horizontal direction, and the load-holding capacity of the specimen is outstanding. The axial compression stiffness of the specimen reaches the maximum when the load is 0.3~0.9 times of the peak load, and at this time, the material damage of steel and concrete is relatively small, and the restraint effect of steel pipe on concrete is relatively effective. With the increase of the replacement rate of recycled aggregate, the axial compression stiffness of the specimen decreases gradually. The steel fiber inhibits the development of cracks and maintains the integrity of the concrete, thereby improving the axial stiffness of the specimen.
黃波,張亮,翟江棚.不銹鋼管與鋼纖維增強再生混凝土組合柱的軸壓性能研究[J].混凝土與水泥制品,2021(10):77-80.
HUANG B,ZHANG L,ZHAI J P.Study on Axial Compression Performance of Stainless Steel Pipe and Steel Fiber Reinforced Recycled Concrete Composite Columns[J].China Concrete and Cement Products,2021(10):77-80.
