{"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\/vi\/posts\/single-girder-crane-main-beam-end-crack-repair\/","title":{"rendered":"S\u1eeda ch\u1eefa v\u1ebft n\u1ee9t \u0111\u1ea7u d\u1ea7m ch\u00ednh c\u1ee7a c\u1ea7n tr\u1ee5c d\u1ea7m \u0111\u01a1n"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>M\u1ee5c l\u1ee5c<\/p><nav><ul><li><a href=\"#crack-cause-analysis\">Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n n\u1ee9t<\/a><ul><li><a href=\"#1-stress-concentration\">1. T\u1eadp trung c\u0103ng th\u1eb3ng<\/a><\/li><li><a href=\"#2-welding-defects\">2. L\u1ed7i h\u00e0n<\/a><\/li><li><a href=\"#3-fatigue-load\">3. T\u1ea3i tr\u1ecdng m\u1ecfi<\/a><\/li><li><a href=\"#4-eccentric-load-trolley-mismatch\">4. T\u1ea3i tr\u1ecdng l\u1ec7ch t\u00e2m v\u00e0 xe \u0111\u1ea9y kh\u00f4ng kh\u1edbp<\/a><\/li><\/ul><\/li><li><a href=\"#repair-recommendations\">Khuy\u1ebfn ngh\u1ecb s\u1eeda ch\u1eefa<\/a><\/li><li><a href=\"#prevention-tips\">M\u1eb9o ph\u00f2ng ng\u1eeba<\/a><\/li><li><a href=\"#conclusion\">S\u1ef1 k\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>Ch\u00fang t\u00f4i \u0111\u00e3 ph\u00e2n t\u00edch m\u1ed9t c\u1ea7n tr\u1ee5c d\u1ea7m \u0111\u01a1n 5 t\u1ea5n, d\u00e0i 31,5m, \u0111\u00e3 12 n\u0103m tu\u1ed5i, c\u00f3 v\u1ebft n\u1ee9t \u1edf \u0111\u1ea7u d\u1ea7m ch\u00ednh (khung m\u00e0u xanh trong \u1ea3nh). Sau \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n v\u00e0 khuy\u1ebfn ngh\u1ecb s\u1eeda ch\u1eefa \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"720\" src=\"https:\/\/www.dgcrane.com\/wp-content\/uploads\/2025\/09\/Single-Girder-Crane-Main-Beam-End-Crack-Repair-Analysis.png\" alt=\"\" class=\"wp-image-15127\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"crack-cause-analysis\">Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n n\u1ee9t<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-stress-concentration\">1. T\u1eadp trung c\u0103ng th\u1eb3ng<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ea7u d\u1ea7m th\u01b0\u1eddng c\u00f3 thi\u1ebft k\u1ebf ti\u1ebft di\u1ec7n thay \u0111\u1ed5i \u0111\u1ec3 ti\u1ebft ki\u1ec7m v\u1eadt li\u1ec7u m\u00e0 v\u1eabn \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng. C\u00e1c \u0111i\u1ec3m chuy\u1ec3n ti\u1ebfp \u0111\u1ed9t ng\u1ed9t (nh\u01b0 g\u00f3c vu\u00f4ng trong \u1ea3nh) c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t, khi\u1ebfn khu v\u1ef1c n\u00e0y d\u1ec5 b\u1ecb n\u1ee9t d\u01b0\u1edbi t\u1ea3i tr\u1ecdng k\u00e9o d\u00e0i.<\/li>\n\n\n\n<li>G\u00f3c k\u1ebft n\u1ed1i v\u00e0 thay \u0111\u1ed5i h\u00ecnh h\u1ecdc \u0111\u1ed9t ng\u1ed9t l\u00e0m gi\u00e1n \u0111o\u1ea1n qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i t\u1ea3i tr\u1ecdng tr\u01a1n tru, h\u1ea1n ch\u1ebf bi\u1ebfn d\u1ea1ng d\u1ea7m v\u00e0 l\u00e0m t\u0103ng t\u00edch t\u1ee5 \u1ee9ng su\u1ea5t, d\u1eabn \u0111\u1ebfn n\u1ee9t v\u1ee1.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-welding-defects\">2. L\u1ed7i h\u00e0n<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u00e0n kh\u00f4ng \u0111\u00fang c\u00e1ch (v\u00ed d\u1ee5: \u0111\u1ed9 x\u1ed1p, t\u1ea1p ch\u1ea5t x\u1ec9, kh\u00f4ng ng\u1ea5u) c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c \u0111i\u1ec3m \u1ee9ng su\u1ea5t, tr\u1edf th\u00e0nh \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u cho c\u00e1c v\u1ebft n\u1ee9t.<\/li>\n\n\n\n<li>C\u00e1c khu v\u1ef1c c\u00f3 m\u1ed1i h\u00e0n ph\u1ee9c t\u1ea1p, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c g\u00f3c nh\u1ecdn c\u00f3 m\u1eb7t c\u1eaft ngang thay \u0111\u1ed5i, \u0111\u1eb7c bi\u1ec7t kh\u00f3 ki\u1ec3m so\u00e1t.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-fatigue-load\">3. T\u1ea3i tr\u1ecdng m\u1ecfi<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ho\u1ea1t \u0111\u1ed9ng l\u00e2u d\u00e0i d\u01b0\u1edbi t\u1ea3i tr\u1ecdng \u0111\u1ed9ng, k\u1ebft h\u1ee3p v\u1edbi s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t t\u1ea1i c\u00e1c m\u1eb7t c\u1eaft ngang thay \u0111\u1ed5i, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn n\u1ee9t do m\u1ecfi.<\/li>\n\n\n\n<li>Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a xe \u0111\u1ea9y kh\u00f4ng \u0111\u1ec1u ho\u1eb7c kho\u1ea3ng c\u00e1ch l\u1edbn \u1edf c\u00e1c m\u1ed1i n\u1ed1i \u0111\u01b0\u1eddng ray c\u00f3 th\u1ec3 g\u00e2y ra t\u1ea3i tr\u1ecdng va ch\u1ea1m, \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh lan truy\u1ec1n v\u1ebft n\u1ee9t.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-eccentric-load-trolley-mismatch\">4. T\u1ea3i tr\u1ecdng l\u1ec7ch t\u00e2m v\u00e0 xe \u0111\u1ea9y kh\u00f4ng kh\u1edbp<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vi\u1ec7c n\u00e2ng th\u01b0\u1eddng xuy\u00ean g\u1ea7n m\u1ed9t b\u00ean c\u1ee7a d\u1ea7m c\u00f3 th\u1ec3 khi\u1ebfn xe \u0111\u1ea9y kh\u00f4ng kh\u1edbp, t\u1ea1o ra t\u1ea3i tr\u1ecdng xo\u1eafn t\u1eadp trung \u1edf \u0111\u1ea7u d\u1ea7m.<\/li>\n\n\n\n<li>\u0110\u01b0\u1eddng ray di chuy\u1ec3n kh\u00f4ng th\u1eb3ng h\u00e0ng ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi \u0111\u01b0\u1eddng ray (\u0111\u01b0\u1eddng ray b\u1ecb tr\u01b0\u1ee3t\/c\u1eafn v\u00e0o \u0111\u01b0\u1eddng ray) c\u00e0ng l\u00e0m t\u00ecnh h\u00ecnh tr\u1edf n\u00ean tr\u1ea7m tr\u1ecdng h\u01a1n.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"repair-recommendations\">Khuy\u1ebfn ngh\u1ecb s\u1eeda ch\u1eefa<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>M\u00e0i v\u00e0 l\u00e0m s\u1ea1ch m\u1ed1i h\u00e0n \u1edf khu v\u1ef1c b\u1ecb n\u1ee9t.<\/li>\n\n\n\n<li>Khoan l\u1ed7 ch\u1eb7n \u1edf \u0111\u1ea7u v\u1ebft n\u1ee9t.<\/li>\n\n\n\n<li>L\u00e0m s\u1ea1ch v\u00e0 h\u00e0n l\u1ea1i c\u00e1c v\u1ebft n\u1ee9t v\u01b0\u1ee3t qu\u00e1 l\u1ed7 ch\u1eb7n.<\/li>\n\n\n\n<li>L\u1eafp c\u00e1c t\u1ea5m gia c\u1ed1 v\u00e0o c\u1ea3 hai t\u1ea5m s\u01b0\u1eddn b\u00ean, ph\u1ee7 200mm t\u1eeb g\u00f3c v\u1ec1 gi\u1eefa nh\u1ecbp \u0111\u1ebfn \u0111\u1ea7u d\u1ea7m.<\/li>\n\n\n\n<li>Th\u00eam c\u00e1c l\u1ed7 h\u00e0n c\u1eafm v\u00e0o c\u00e1c t\u1ea5m gia c\u1ed1 v\u00e0 h\u00e0n xung quanh c\u00e1c c\u1ea1nh; n\u1ebfu c\u00f3 th\u1ec3, h\u00e3y l\u1eafp c\u00e1c thanh gi\u1eb1ng t\u1ea1i m\u1ed1i n\u1ed1i c\u1ee7a c\u00e1c t\u1ea5m b\u00edch \u0111\u1ec3 t\u0103ng th\u00eam \u0111\u1ed9 c\u1ee9ng.<\/li>\n\n\n\n<li>L\u00e0m s\u1ea1ch v\u00e0 s\u01a1n sau khi h\u00e0n.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"prevention-tips\">M\u1eb9o ph\u00f2ng ng\u1eeba<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u1eed d\u1ee5ng c\u00e1c chuy\u1ec3n ti\u1ebfp m\u1eb7t c\u1eaft ngang tr\u01a1n tru trong thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u1ea3m s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t.<\/li>\n\n\n\n<li>Ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd ch\u1ea5t l\u01b0\u1ee3ng h\u00e0n.<\/li>\n\n\n\n<li>Ti\u1ebfn h\u00e0nh ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c v\u1ebft n\u1ee9t.<\/li>\n\n\n\n<li>Tr\u00e1nh qu\u00e1 t\u1ea3i v\u00e0 tu\u00e2n th\u1ee7 \u0111\u00fang quy tr\u00ecnh v\u1eadn h\u00e0nh.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\">S\u1ef1 k\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p>Ph\u00e2n t\u00edch \u0111\u00fang c\u00e1ch, s\u1eeda ch\u1eefa k\u1ecbp th\u1eddi v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a c\u1ea7n tr\u1ee5c v\u00e0 \u0111\u1ea3m b\u1ea3o v\u1eadn h\u00e0nh an to\u00e0n. Ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean, h\u00e0n ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 x\u1eed l\u00fd c\u1ea9n th\u1eadn c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba c\u00e1c v\u1ebft n\u1ee9t ph\u00e1t tri\u1ec3n v\u00e0 lan r\u1ed9ng, gi\u00fap thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n lu\u00f4n \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>","protected":false},"excerpt":{"rendered":"Ch\u00fang t\u00f4i \u0111\u00e3 ph\u00e2n t\u00edch m\u1ed9t c\u1ea7u tr\u1ee5c d\u1ea7m \u0111\u01a1n 5 t\u1ea5n, d\u00e0i 31,5m, \u0111\u00e3 12 n\u0103m tu\u1ed5i, c\u00f3 v\u1ebft n\u1ee9t \u1edf \u0111\u1ea7u d\u1ea7m ch\u00ednh (khung m\u00e0u xanh trong \u1ea3nh). D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n v\u00e0 khuy\u1ebfn ngh\u1ecb s\u1eeda ch\u1eefa \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o. Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n n\u1ee9t 1. T\u1eadp trung \u1ee9ng su\u1ea5t 2. L\u1ed7i h\u00e0n 3. T\u1ea3i tr\u1ecdng m\u1ecfi 4. T\u1ea3i tr\u1ecdng l\u1ec7ch t\u00e2m &amp; Kh\u00f4ng kh\u1edbp con l\u0103n Khuy\u1ebfn ngh\u1ecb s\u1eeda ch\u1eefa M\u1eb9o ph\u00f2ng ng\u1eeba K\u1ebft lu\u1eadn Ph\u00e2n t\u00edch \u0111\u00fang c\u00e1ch, s\u1eeda ch\u1eefa k\u1ecbp th\u1eddi v\u00e0 ph\u00f2ng ng\u1eeba [\u2026]","protected":false},"featured_media":15127,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[351],"posts_tag":[957],"class_list":["post-15126","posts","type-posts","status-publish","has-post-thumbnail","hentry","posts_category-blog","posts_tag-crane-repair"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/15126"}],"collection":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":4,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/15126\/revisions"}],"predecessor-version":[{"id":15131,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/15126\/revisions\/15131"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/media\/15127"}],"wp:attachment":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/media?parent=15126"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/posts_category?post=15126"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/posts_tag?post=15126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}