Japan Earthquake Engineering Association Annual Conference
Tensile loading tests of wood screw joint with steel plate and cross laminated were performed. There are two types of tests, the one is single joint shear test, and the other is multiple joint tensile test. The targets of the experiments are the effect of the grain direction and the effect of edge of the laminae which is not glued. The parameters for single joint tests are loading directions and material properties, and exist of border of layers. The parameters for multiple joint tests are loading directions and material properties. The loading protocols were monotonic loading, only tensile cyclic loading, and tensile and push cyclic loading. Two types of loading method were attempted on the single joint shear test: (a) Two steel plates were attached on the outer layers of CLT, and these plates are fixed each other, (b) One steel plate were attached on the one side of CLT, and CLT was not fixed. On the single joint shear test (a), brittle failure of screw occurred when the displacements were about 10 mm. The otherwise, the pulling out of screw and the shear failure of the outer lamina was observed on the single joint shear test (b). Tensile and push cyclic loading protocol gave negative effect on the deformation ability of the single joint connection. The exist of the border of layers didn’t affected on the load displacement relationships.