Studies On Mechanical Properties Of Light Wall Panel Under Horizontal Displacement

Recently, as light wall panel is more and more widely used, systematic research about its behavior under horizontal displacement is needed. Material, joint connection, interaction of panels and main structure and panel joint are four main problems. In this paper, experiment and FEM approaches are employed to study the mechanical performance of light wall panel under horizontal displacement. Mechanical properties of materials, bonding interface and light wall panels are mainly studied. The main research are as follows.Cube resisting compression test, tensile splitting test and elastic modulus test of haydite concrete and mortar are performed. Uniaxial tensile and compressive strengths and the corresponding strains are calculated. Uniaxial stress-strain curves of haydite concrete and mortar used in the scale test are derived. Thus, the material data needed for the finite element analysis are obtained.Tensile bond strength test and Z-shaped specimen direct shear test of mortar to haydite concrete bond interface are performed. Thus, tensile bond strength and upward section of traction-separation curve are obtained. Taking shear deformation of the material near the interface take into consideration, we get the shear stiffness of the interface by means of linear fitting. FEM model for bonding interface analysis is established.Scale-model experiment of light wall panel under horizontal displacement is performed, and load-displacement curve is obtained. Mechanical behavior of light wall panel in 4 different stages is studied. FEM models for scale-model experiment and C-shaped joint panel are established based on previous study about material and bond interface. The load-displacement curve of FEM result is similar to that of scale-model experiment in stage Ⅰ, but the peak load of the former is bigger than that of the latter. The deviation may result from the difference between the damage initiation criteria employed in the FEM model and that of the practical situation. Mechanical behavior of joint connections is studied. It differs much between the mechanical behavior of end joint connections and that of the middle joint connections. Loads applied to the end joint connections are around 2 times that of the middle joint connections.