Experimental Study on Crack Resistance of New Prefabricated Building Shell Plates without Removing Molds
Modular integrated Construction (MiC) consist of precast concrete modules connected by post-casted concrete. To realize the mold-free casting of shear walls between modules as well as material reduction, a prefabricated mold-free shell plate with a thickness of on-ly 3 cm was set up. Considering its thickness, the mechanical behaviors and failure mechanism of concrete in the process of concrete pouring were still to be clear. Therefore, the mechanical properties of the mold-free shell plate were experimentally studied and a finite element model was established. A new type of loading steel frame was designed. The static trapezoidal loading test was carried out on three grarps of prefabricated reinforced concrete mold shell plates (one without opening holes, one with opening holes on the side and one with opening holes in the middle). The cracking load, deflection curve and load-strain curve are obtained. The analysis and test re-sults show that the concrete cracking occurs in the truss reinforcement of the three groups of specimens and the bearing capacity keeps increasing all the time, indicating that the bearing capacity of the mold shell is good. The crack development of the three groups of spec-imens showed that the crack location and the failure trend of the specimen were basically the same.
prefabricated buildingshell platetrapezoidal pilefinite element analysiscracking load
万方数据
维普
