再生混凝土密肋复合墙体受力性能试验研究

对3榀1∶2比例模型,再生骨料取代率分别为100%、50%和0%的密肋复合墙体的力学性能进行对比试验.研究了再生混凝土密肋复合墙体的破坏机制、承载力、延性、刚度退化等性能.研究发现:墙体属于剪切破坏;最大水平承载力,50%取代率的墙体和普通混凝土墙体相比没有下降,而100%取代率墙体承载力下降18%;延性系数,随着取代率的增加而提高.试验表明:50%取代率密肋复合墙体具有良好的力学性能,应用于实际工程完全可行;而100%取代率墙体需慎用.

Mechanical characteristics and analyses of seismic performance of multi-rib slab wall

This paper studies the three recycled concrete multi-ribbed composite walls (composed of 100%, 50%, 0% recycled aggregate) by experiment. The mechanical behaviors of recycled concrete multi-ribbed composite wall, such as the failure patterns, hysteretic loop, ductility, deterioration of stiffness, etc., are researched. The test results indicate: the failure pattern of multi-ribbed wall using recycled concrete is shearing failure; the maximum horizontal bearing capacity of recycled concrete multi-ribbed wall, composed of 50% recycled aggregate, is no less than natural concrete wall.However, the bearing capacity of the wall, composed of 100% recycled aggregate, is brought down by 18%; and the ductility factors increase as the replacement rate of recycled aggregate increase. The study concludes that the recycled concrete multi-ribbed wall, with the displacement rate of 50%, has better mechanical properties and is quite feasible for practical civil engineering.The recycled concrete multi-ribbed wall, which the displacement rate is 100%, should be used carefully.