EFFECT OF JOINTED COLUMNS OF EXISTING WOODEN STRUCTURE ON MECHANICAL CHARACTERISTICS AND NATURAL FREQUENCY

Abstract

This paper reports the results of our research on change of mechanical characteristics of existing wooden structures with jointed column. First, taking the questionnaire survey for carpenters or workers, and conducting measurement survey on a temple, it’s found that Kanawa-tsugi is used a lot for repair. Next, based on displacement incremental analysis on plane frame models with jointed column, shear force and initial stiffness deteriorate with jointed column number. Lastly, based on eigenvalue analysis on solid frame model, it’s found that, in case of jount near inflection point of column, or high bending rigidity of joint, the natural frequency rise.