A Study on Torsional Vibration Characteristics of Wooden House Models With Random Wall Arrangement Subjected to Earthquake Motions

In this study, I attempt to clarify the characteristics of torsional vibration due to eccentricity by simulating a model using random numbers. Several planar models are set up, and method of dividing into four parts and the modulus of eccentricity are calculated, and the correspondence between both calculation results is confirmed. The eccentric ratio, which is the ratio of eccentricity distance to plan width, is introduced as an alternative to the modulus of eccentricity. The concept of the eccentric ratio is similar to that of modulus of eccentricity, and the calculation is less complicated than that of the modulus of eccentricity, and it can be easily calculated using spreadsheet software. The eccentricity ratio, like the method of dividing into four parts, does not include information about the orthogonal walls, so it is safer than the modulus of eccentricity in that it does not overly expect the effect of the orthogonal walls.