Abstract: In order to study the damage form, connection performance and the main influencing factors of load carrying capacity of aluminum alloy formwork (AAF) under semi-rigid connection, this paper conducts the static loading test on the semi-rigid connection of AAF and establishes the finite element model by ABAQUS, and compares the finite element simulation data with the test data to validate the effectiveness of the finite element model. On this basis, the effects of different pin numbers on the semi-rigid connection performance and load carrying capacity of AAF and the effects of five parameters, namely, the thickness of face plate and longitudinal ribs, the height of side and end ribs, the thickness of side and end ribs, the number of transverse ribs and the thickness of transverse ribs, on the maximum displacement of the formwork under the action of vertical load were investigated. The analysis of variance (ANOVA) based on orthogonal tests was performed on the formwork with 25 different combinations of geometric parameters to compare the influence of different parameters on the load carrying capacity of the formwork. The results show that the stress of the side ribs is always at a high level during the whole loading process, and the maximum stress point (damage point) is at the pin hole directly below the loading point. Increasing the number of pins can improve the initial stiffness and ultimate bending moment of the semi-rigid connection. The influence degree of different geo- metric parameters on the load carrying capacity of the formwork, in descending order, is the number of transverse ribs, the thickness of face plate and longitudinal ribs, the thickness of side and end ribs, the thickness of transverse ribs, and the height of side and end ribs.
Keywords: aluminum alloy formwork(AAF); semi-rigid connection; static loading test; parametric analysis; orthogonal test; analysis of variance(ANOVA)
合肥工业大学学报自科版