In order to evaluate the safety oi the buildings the structures of which was repaired , it is very important to es亡imate the performance of the weld structural parts . This study ts baseCl on the exper 〔 ment ;after giving weld repair to the dlsしorted SM490A steel member with weldjoint [ n the oonditiOn which is 1 正 ke the actua1 weld work , we examiDed the mechan [ ca 【behavior and property . 「 Mne study led to Lhe follQ 丶viDg results . D [ n 亡 he cold condition , the toughness doesn ' t

more »

... after giving we [ d repair し o the broken s し eel n }ember with weld jo[nt . 2) The weld repaired stee [ member has 七 he lower tensHe strength 亡 han the Qriginal member . 3) The steel memberwith more load than elasticity has the higher tensile and yietd strength and the less deiormation. 4) The weld repaired section has father tmproved on mechanica [behavior in the cold condi 巨on than セ he pre − loaded member , Keywordssteel member , weld ゴ oint , re ρair . mechanicai behavtor 鋼 材,溶接 ,補修,材料特性