Abstract
New retrofit method for improving the seismic performance of the low aseismic buildings, was developed. Its method is the added shear wall to a low aseismic building. The characteristics of its method were 1) using the coarse aggregate cotter and 2) using the expansive concrete of the added walls. Structural tests of the lateral loading tests on shear walls, and the direct shear tests of the joint plane with adhered aggregate cotter were carried out to investigate the proposed method. Nonlinear finite element analysis was carried out to simulate the test result for convincing its analytical accuracy. Next, non-testing parameters were analyzed to investigate the design strength. Practical method and the quality control method were defined for good performance when an earthquake.
