{"id":15126,"date":"2025-09-10T03:27:20","date_gmt":"2025-09-10T03:27:20","guid":{"rendered":"https:\/\/www.dgcrane.com\/?post_type=posts&#038;p=15126"},"modified":"2025-09-10T03:27:23","modified_gmt":"2025-09-10T03:27:23","slug":"single-girder-crane-main-beam-end-crack-repair","status":"publish","type":"posts","link":"https:\/\/www.dgcrane.com\/ja\/posts\/single-girder-crane-main-beam-end-crack-repair\/","title":{"rendered":"\u30b7\u30f3\u30b0\u30eb\u30ac\u30fc\u30c0\u30fc\u30af\u30ec\u30fc\u30f3\u306e\u4e3b\u6881\u7aef\u90e8\u306e\u3072\u3073\u5272\u308c\u4fee\u7406"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>\u76ee\u6b21<\/p><nav><ul><li><a href=\"#crack-cause-analysis\">\u3072\u3073\u5272\u308c\u539f\u56e0\u5206\u6790<\/a><ul><li><a href=\"#1-stress-concentration\">1.\u5fdc\u529b\u96c6\u4e2d<\/a><\/li><li><a href=\"#2-welding-defects\">2.\u6eb6\u63a5\u6b20\u9665<\/a><\/li><li><a href=\"#3-fatigue-load\">3.\u75b2\u52b4\u8377\u91cd<\/a><\/li><li><a href=\"#4-eccentric-load-trolley-mismatch\">4.\u504f\u5fc3\u8377\u91cd\u3068\u30c8\u30ed\u30ea\u30fc\u306e\u4e0d\u4e00\u81f4<\/a><\/li><\/ul><\/li><li><a href=\"#repair-recommendations\">\u4fee\u7406\u306e\u63a8\u5968\u4e8b\u9805<\/a><\/li><li><a href=\"#prevention-tips\">\u4e88\u9632\u306e\u30d2\u30f3\u30c8<\/a><\/li><li><a href=\"#conclusion\">\u7d50\u8ad6<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>12\u5e74\u524d\u306b\u8a2d\u7f6e\u3055\u308c\u305f5t\u300131.5m\u306e\u30b7\u30f3\u30b0\u30eb\u30ac\u30fc\u30c0\u30fc\u30af\u30ec\u30fc\u30f3\uff08\u5199\u771f\u306e\u9752\u67a0\u90e8\u5206\uff09\u306e\u4e3b\u6881\u7aef\u90e8\u306b\u3072\u3073\u5272\u308c\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002\u539f\u56e0\u5206\u6790\u3068\u4fee\u7406\u306e\u63a8\u5968\u4e8b\u9805\u3092\u4ee5\u4e0b\u306b\u307e\u3068\u3081\u307e\u3057\u305f\u306e\u3067\u3001\u3054\u53c2\u8003\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<figure 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