ESTIMATION TO IMPROVEMENT FEATURE OF DEFECTIVE MASONRY GARDEN WALLS

−In case of Sendai-city area where the 1978 Miyagiken-oki earthquake has hit−

Abstract

A tracing survey to clarify the improvement feature of masonry garden walls ranked in the poor quality at 1980 (two years later from the 1978 Miyagiken-oki earthquake) was performed. The result of the inspection indicated a feature that over 80% of houses which had poor walls have been improved toward the safety. Some findings for studying how to evaluate the improving situation were also obtained. Investigation shows that a numerical method using the logit conversion could be a useful tool for the evaluation.