Abstract: A new type of air-duct-embedded floor is presented in this study. The shear failure modes and mechanical properties of a cast-in-place air-duct embedded floor with longitudinal and transverse holes were studied using static tests. Based on the failure mechanism of the floor slab, a shear-bearing capacity calculation method for this floor type was proposed. The results show that the shear performance of a cast-in-place floor with embedded air ducts is better, that the shear capacity of a floor with an along-hole is greater than that of a floor with a cross-hole, and that the structure of a floor with an along-hole exhibits a good linear elastic performance before reaching peak load. In addition, this type of structure can be used in heat, ventilating and air conditioning (HVAC) ground-source heat pump air-conditioning systems to achieve the overall effects of green environmental protection and resource savings.

Key words: embedded air duct, green building, along hole, transverse hole, shear bearing capacity