{"id":23,"date":"2026-05-07T09:48:00","date_gmt":"2026-05-07T02:48:00","guid":{"rendered":"http:\/\/cokhixdquangminh.com\/?p=23"},"modified":"2026-05-07T09:48:00","modified_gmt":"2026-05-07T02:48:00","slug":"lua-chon-mac-thep-phu-hop-cho-tung-loai-cong-trinh-co-khi-va-xay-dung","status":"publish","type":"post","link":"https:\/\/cokhixdquangminh.com\/?p=23","title":{"rendered":"L\u1ef1a ch\u1ecdn m\u00e1c th\u00e9p ph\u00f9 h\u1ee3p cho t\u1eebng lo\u1ea1i c\u00f4ng tr\u00ecnh c\u01a1 kh\u00ed v\u00e0 x\u00e2y d\u1ef1ng"},"content":{"rendered":"<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cokhixdquangminh.com\/wp-content\/uploads\/2026\/06\/bc_2335_9445.jpg\" alt=\"\"\/><\/figure>\n<p>Th\u00e9p l\u00e0 v\u1eadt li\u1ec7u n\u1ec1n t\u1ea3ng c\u1ee7a ng\u00e0nh c\u01a1 kh\u00ed v\u00e0 x\u00e2y d\u1ef1ng, nh\u01b0ng kh\u00f4ng ph\u1ea3i lo\u1ea1i th\u00e9p n\u00e0o c\u0169ng d\u00f9ng \u0111\u01b0\u1ee3c cho m\u1ecdi m\u1ee5c \u0111\u00edch. Vi\u1ec7c ch\u1ecdn sai m\u00e1c th\u00e9p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft c\u1ea5u kh\u00f4ng \u0111\u1ee7 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c, d\u1ec5 g\u00e3y gi\u00f2n khi va \u0111\u1eadp, ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i g\u00e2y l\u00e3ng ph\u00ed khi d\u00f9ng v\u1eadt li\u1ec7u \u0111\u1eaft ti\u1ec1n cho h\u1ea1ng m\u1ee5c kh\u00f4ng c\u1ea7n thi\u1ebft. Hi\u1ec3u \u0111\u1eb7c t\u00ednh c\u1ee7a t\u1eebng nh\u00f3m th\u00e9p gi\u00fap k\u1ef9 s\u01b0 v\u00e0 ch\u1ee7 \u0111\u1ea7u t\u01b0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh c\u00e2n b\u1eb1ng gi\u1eefa an to\u00e0n v\u00e0 chi ph\u00ed.<\/p>\n<h2>Ph\u00e2n bi\u1ec7t c\u00e1c nh\u00f3m th\u00e9p th\u00f4ng d\u1ee5ng<\/h2>\n<p>Tr\u00ean th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam, th\u00e9p x\u00e2y d\u1ef1ng v\u00e0 c\u01a1 kh\u00ed th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n theo gi\u1edbi h\u1ea1n ch\u1ea3y v\u00e0 th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc. Th\u00e9p cacbon th\u00f4ng th\u01b0\u1eddng nh\u01b0 CT3 hay SS400 c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y kho\u1ea3ng 235 \u0111\u1ebfn 245 MPa, d\u1ec5 gia c\u00f4ng, d\u1ec5 h\u00e0n v\u00e0 gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd n\u00ean \u0111\u01b0\u1ee3c d\u00f9ng ph\u1ed5 bi\u1ebfn cho nh\u00e0 x\u01b0\u1edfng, khung k\u00e8o v\u00e0 c\u00e1c k\u1ebft c\u1ea5u ch\u1ecbu t\u1ea3i v\u1eeba ph\u1ea3i.<\/p>\n<ul>\n<li>Th\u00e9p CT3, SS400: ph\u1ed5 th\u00f4ng, d\u1ec5 h\u00e0n, d\u00f9ng cho ph\u1ea7n l\u1edbn k\u1ebft c\u1ea5u d\u00e2n d\u1ee5ng v\u00e0 c\u00f4ng nghi\u1ec7p nh\u1eb9.<\/li>\n<li>Th\u00e9p c\u01b0\u1eddng \u0111\u1ed9 cao Q345, S355: gi\u1edbi h\u1ea1n ch\u1ea3y cao h\u01a1n, cho ph\u00e9p gi\u1ea3m ti\u1ebft di\u1ec7n v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng k\u1ebft c\u1ea5u.<\/li>\n<li>Th\u00e9p h\u1ee3p kim, th\u00e9p ch\u1ecbu nhi\u1ec7t, th\u00e9p kh\u00f4ng g\u1ec9: d\u00f9ng cho m\u00f4i tr\u01b0\u1eddng \u0111\u1eb7c th\u00f9 nh\u01b0 l\u00f2 nhi\u1ec7t, h\u00f3a ch\u1ea5t, th\u1ef1c ph\u1ea9m.<\/li>\n<\/ul>\n<h2>Vai tr\u00f2 c\u1ee7a gi\u1edbi h\u1ea1n ch\u1ea3y v\u00e0 \u0111\u1ed9 d\u1ebbo<\/h2>\n<p>Khi thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u, k\u1ef9 s\u01b0 quan t\u00e2m hai ch\u1ec9 ti\u00eau c\u01a1 h\u1ecdc c\u1ed1t l\u00f5i l\u00e0 gi\u1edbi h\u1ea1n ch\u1ea3y v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i. Gi\u1edbi h\u1ea1n ch\u1ea3y quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i tr\u01b0\u1edbc khi bi\u1ebfn d\u1ea1ng d\u1ebbo, c\u00f2n \u0111\u1ed9 gi\u00e3n d\u00e0i ph\u1ea3n \u00e1nh kh\u1ea3 n\u0103ng bi\u1ebfn d\u1ea1ng m\u00e0 kh\u00f4ng g\u00e3y \u0111\u1ed9t ng\u1ed9t. M\u1ed9t k\u1ebft c\u1ea5u t\u1ed1t c\u1ea7n \u0111\u1ee7 c\u1ee9ng \u0111\u1ec3 kh\u00f4ng v\u00f5ng qu\u00e1 m\u1ee9c nh\u01b0ng c\u0169ng ph\u1ea3i \u0111\u1ee7 d\u1ebbo \u0111\u1ec3 c\u1ea3nh b\u00e1o tr\u01b0\u1edbc khi s\u1ee5p \u0111\u1ed5, tr\u00e1nh ph\u00e1 ho\u1ea1i gi\u00f2n nguy hi\u1ec3m.<\/p>\n<p>V\u1edbi c\u00e1c c\u00f4ng tr\u00ecnh ch\u1ecbu t\u1ea3i tr\u1ecdng \u0111\u1ed9ng nh\u01b0 c\u1ea7u, s\u00e0n c\u00f4ng nghi\u1ec7p \u0111\u1eb7t m\u00e1y rung hay k\u1ebft c\u1ea5u v\u00f9ng c\u00f3 \u0111\u1ed9ng \u0111\u1ea5t, \u0111\u1ed9 dai va \u0111\u1eadp tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 quan tr\u1ecdng. Th\u00e9p gi\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u00f3 th\u1ec3 n\u1ee9t v\u1ee1 b\u1ea5t ng\u1edd, v\u00ec v\u1eady c\u1ea7n ch\u1ecdn lo\u1ea1i c\u00f3 ch\u1ee9ng ch\u1ec9 th\u1eed va \u0111\u1eadp \u0111\u1ea1t y\u00eau c\u1ea7u.<\/p>\n<h2>T\u00ednh h\u00e0n v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/h2>\n<p>Kh\u1ea3 n\u0103ng h\u00e0n c\u1ee7a th\u00e9p ph\u1ee5 thu\u1ed9c nhi\u1ec1u v\u00e0o h\u00e0m l\u01b0\u1ee3ng cacbon v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 h\u1ee3p kim, th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 qua ch\u1ec9 s\u1ed1 cacbon t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. Th\u00e9p c\u00f3 cacbon t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u00e0ng cao th\u00ec c\u00e0ng d\u1ec5 n\u1ee9t v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t khi h\u00e0n, \u0111\u00f2i h\u1ecfi ph\u1ea3i gia nhi\u1ec7t tr\u01b0\u1edbc v\u00e0 ki\u1ec3m so\u00e1t ch\u1ebf \u0111\u1ed9 h\u00e0n ch\u1eb7t ch\u1ebd. \u0110\u00e2y l\u00e0 l\u00fd do nhi\u1ec1u k\u1ebft c\u1ea5u v\u1eabn \u01b0u ti\u00ean th\u00e9p cacbon th\u1ea5p d\u00f9 ph\u1ea3i t\u0103ng ti\u1ebft di\u1ec7n, v\u00ec vi\u1ec7c thi c\u00f4ng \u0111\u01a1n gi\u1ea3n v\u00e0 r\u1ee7i ro th\u1ea5p h\u01a1n.<\/p>\n<h2>C\u00e2n nh\u1eafc m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c<\/h2>\n<p>M\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 l\u1edbp b\u1ea3o v\u1ec7. C\u00f4ng tr\u00ecnh ven bi\u1ec3n ch\u1ecbu h\u01a1i mu\u1ed1i \u0103n m\u00f2n m\u1ea1nh n\u00ean \u01b0u ti\u00ean m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng ho\u1eb7c th\u00e9p ch\u1ed1ng \u0103n m\u00f2n kh\u00ed quy\u1ec3n. Nh\u00e0 m\u00e1y th\u1ef1c ph\u1ea9m v\u00e0 d\u01b0\u1ee3c ph\u1ea9m c\u1ea7n th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o v\u1ec7 sinh. C\u00e1c b\u1ed9 ph\u1eadn ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao trong l\u00f2 nung l\u1ea1i c\u1ea7n th\u00e9p ch\u1ecbu nhi\u1ec7t gi\u1eef \u0111\u01b0\u1ee3c c\u01a1 t\u00ednh khi n\u00f3ng.<\/p>\n<h2>C\u00e2n b\u1eb1ng gi\u1eefa hi\u1ec7u qu\u1ea3 k\u1ef9 thu\u1eadt v\u00e0 chi ph\u00ed<\/h2>\n<p>Th\u00e9p c\u01b0\u1eddng \u0111\u1ed9 cao cho ph\u00e9p gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng k\u1ebft c\u1ea5u, t\u1eeb \u0111\u00f3 gi\u1ea3m t\u1ea3i tr\u1ecdng m\u00f3ng v\u00e0 chi ph\u00ed v\u1eadn chuy\u1ec3n, nh\u01b0ng \u0111\u01a1n gi\u00e1 v\u1eadt li\u1ec7u cao h\u01a1n v\u00e0 \u0111\u00f2i h\u1ecfi tay ngh\u1ec1 gia c\u00f4ng t\u1ed1t h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, th\u00e9p th\u00f4ng th\u01b0\u1eddng r\u1ebb v\u00e0 d\u1ec5 l\u00e0m nh\u01b0ng n\u1eb7ng h\u01a1n. Quy\u1ebft \u0111\u1ecbnh cu\u1ed1i c\u00f9ng n\u00ean d\u1ef1a tr\u00ean b\u00e0i to\u00e1n t\u1ed5ng th\u1ec3 bao g\u1ed3m chi ph\u00ed v\u1eadt t\u01b0, chi ph\u00ed gia c\u00f4ng, t\u1ea3i tr\u1ecdng m\u00f3ng v\u00e0 y\u00eau c\u1ea7u ti\u1ebfn \u0111\u1ed9.<\/p>\n<p>M\u1ed9t nguy\u00ean t\u1eafc th\u1ef1c t\u1ebf l\u00e0 lu\u00f4n y\u00eau c\u1ea7u ch\u1ee9ng ch\u1ec9 ch\u1ea5t l\u01b0\u1ee3ng v\u1eadt li\u1ec7u cho m\u1ecdi l\u00f4 th\u00e9p nh\u1eadp v\u1ec1, \u0111\u1ed3ng th\u1eddi ki\u1ec3m tra ng\u1eabu nhi\u00ean c\u01a1 t\u00ednh khi c\u1ea7n. Vi\u1ec7c minh b\u1ea1ch ngu\u1ed3n g\u1ed1c kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o an to\u00e0n k\u1ebft c\u1ea5u m\u00e0 c\u00f2n gi\u00fap truy xu\u1ea5t tr\u00e1ch nhi\u1ec7m n\u1ebfu sau n\u00e0y ph\u00e1t sinh s\u1ef1 c\u1ed1, \u0111\u1eb7c bi\u1ec7t v\u1edbi nh\u1eefng c\u00f4ng tr\u00ecnh quy m\u00f4 l\u1edbn v\u00e0 tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf d\u00e0i.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Th\u00e9p l\u00e0 v\u1eadt li\u1ec7u n\u1ec1n t\u1ea3ng c\u1ee7a ng\u00e0nh c\u01a1 kh\u00ed v\u00e0 x\u00e2y d\u1ef1ng, nh\u01b0ng kh\u00f4ng ph\u1ea3i lo\u1ea1i th\u00e9p n\u00e0o c\u0169ng d\u00f9ng \u0111\u01b0\u1ee3c cho m\u1ecdi m\u1ee5c \u0111\u00edch. Vi\u1ec7c ch\u1ecdn sai m\u00e1c th\u00e9p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft c\u1ea5u kh\u00f4ng \u0111\u1ee7 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c, d\u1ec5 g\u00e3y gi\u00f2n khi va \u0111\u1eadp, ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i g\u00e2y l\u00e3ng ph\u00ed&hellip;<\/p>\n","protected":false},"author":0,"featured_media":22,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chua-phan-loai"],"_links":{"self":[{"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=\/wp\/v2\/posts\/23","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=23"}],"version-history":[{"count":0,"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=\/wp\/v2\/posts\/23\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=\/wp\/v2\/media\/22"}],"wp:attachment":[{"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cokhixdquangminh.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}