{"id":2977,"date":"2011-06-12T23:11:00","date_gmt":"2011-06-12T15:11:00","guid":{"rendered":"http:\/\/www.jiafanglei.com\/?p=2977"},"modified":"2022-06-12T23:11:53","modified_gmt":"2022-06-12T15:11:53","slug":"%e6%b5%85%e8%b0%88%e7%be%8e%e6%a0%87%e9%92%a2%e7%bb%93%e6%9e%84%e7%a8%b3%e5%ae%9a%e5%88%86%e6%9e%90%e5%92%8c%e8%ae%be%e8%ae%a1%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"http:\/\/www.jiafanglei.com\/en\/archives\/2977","title":{"rendered":"\u6d45\u8c08\u7f8e\u6807\u94a2\u7ed3\u6784\u7a33\u5b9a\u5206\u6790\u548c\u8bbe\u8ba1\u65b9\u6cd5"},"content":{"rendered":"\n<p>\u94a2\u7ed3\u6784\u7a33\u5b9a\u8bbe\u8ba1\u5411\u6765\u90fd\u662f\u7ed3\u6784\u5de5\u7a0b\u4e13\u4e1a\u7684\u96be\u70b9\uff0c\u91cc\u8fb9\u5145\u65a5\u7740\u8bb8\u591a\u62bd\u8c61\u3001\u96be\u7406\u89e3\u3001\u6613\u6df7\u6dc6\u7684\u6982\u5ff5\uff0c\u8001\u7248\u7684\u56fd\u6807\u94a2\u7ed3\u6784\u8bbe\u8ba1\u89c4\u8303\u672a\u80fd\u505a\u5230\u6e05\u6670\u7684\u3001\u51c6\u786e\u7684\u4f20\u9012\u7ed9\u5de5\u7a0b\u8bbe\u8ba1\u4eba\u5458\u7a33\u5b9a\u76f8\u5173\u89c4\u5b9a\uff0c\u5176\u4e2d\u7684\u4e00\u4e9b\u8fc7\u5206\u7b80\u5316\u3001\u6613\u8bef\u89e3\u7684\u89c4\u5b9a\u6761\u6b3e\uff0c\u8ba9\u5de5\u7a0b\u5e08\u5728\u9762\u5bf9\u771f\u5b9e\u3001\u590d\u6742\u7684\u9879\u76ee\u65f6\u7ecf\u5e38\u7f3a\u4e4f\u4fe1\u5fc3\u3002<br><br>\u672c\u6587\u5e0c\u671b\u501f\u52a9\u7f8e\u6807\u94a2\u7ed3\u6784\u7a33\u5b9a\u7684\u7406\u8bba\u548c\u65b9\u6cd5\u7684\u4ecb\u7ecd\uff0c\u8ba9\u8bfb\u8005\u5efa\u7acb\u8d77\u94a2\u7ed3\u6784\u7a33\u5b9a\u7684\u5168\u5c40\u89c2\uff0c\u7136\u540e\u5728\u8fd9\u79cd\u5168\u5c40\u8ba4\u77e5\u7684\u57fa\u7840\u4e0a\uff0c\u901a\u8fc7\u5de5\u7a0b\u5b9e\u8df5\u6216\u89c4\u8303\u5b66\u4e60\uff0c\u6162\u6162\u7684\u586b\u5145\u7ec6\u8282\u3002<br><br>\u6211\u4eec\u5c06\u4ece\u4e00\u4e2a\u57fa\u672c\u6982\u5ff5\u5f00\u59cb\uff0c\u9010\u6b65\u589e\u52a0\u94a2\u7ed3\u6784\u7a33\u5b9a\u5206\u6790\u4e2d\u7684\u5f71\u54cd\u56e0\u7d20\uff0c\u76f4\u81f3\u8fbe\u5230\u76ee\u524d\u89c4\u8303\u8981\u6c42\u7684\u6df1\u5ea6\uff0c\u5e76\u501f\u6b64\u5bf9\u6bd4 DM ELM FOM \u4e09\u79cd\u65b9\u6cd5\u5206\u522b\u5982\u4f55\u8003\u8651\u8fd9\u4e9b\u5f71\u54cd\u56e0\u7d20\u3002<br><br>\u7f8e\u6807\u4e2d\u6240\u6709\u7684\u6784\u4ef6\u7684\u5f3a\u5ea6\u9a8c\u7b97\u90fd\u53ef\u4ee5\u4ee5\u4e0b\u516c\u5f0f\u6765\u8868\u8fbe<br>Q &lt; \u0444Rn<br>\u5176\u4e2d\uff0cQ \u662f LRFD \u7684\u8377\u8f7d\u6548\u5e94\uff0c\u0444 \u662f\u6750\u6599\u6297\u529b\u7cfb\u6570\uff0cRn \u662f\u6784\u4ef6\u7684\u540d\u4e49\u5f3a\u5ea6\u3002\u4ee5\u4e0b\u7684\u63a8\u6f14\u8fc7\u7a0b\u4e5f\u5c06\u5206\u8377\u8f7d\u6548\u5e94\u548c\u6297\u529b\u4e24\u90e8\u5206\u63cf\u8ff0\u3002<br><br><strong>STEP 0<\/strong><br>\u8d77\u59cb\u7684\u6a21\u578b\u662f\u57fa\u4e8e\u4ee5\u4e0b\u5047\u5b9a\uff1a<br>\u8377\u8f7d\u6548\u5e94<br>1 \u7ed3\u6784\u6ca1\u6709\u4efb\u4f55\u521d\u59cb\u7f3a\u9677<br>2 \u94a2\u6750\u4e3a\u7406\u60f3\u5f39\u6027\u4f53<br>3 \u4e0d\u8003\u8651\u4e8c\u9636\u6548\u5e94<br>\u5373\u633a\u76f4\u6746\u4ef6\u5728 LRFD \u7ec4\u5408\u4e0b\u7684\u4e00\u9636\u7ebf\u5f39\u6027\u5206\u6790<br>\u6297\u529b<br>1 \u6784\u4ef6\u5f3a\u5ea6\u80fd\u591f\u8fbe\u5230\u622a\u9762\u5c48\u670d\u5f3a\u5ea6\uff0c\u5373 P = fyA, M = fyZ<br><br>\u5982\u679c\u7ed3\u6784\u8bbe\u8ba1\u6b62\u6b65\u4e8e\u6b64\uff0c\u90a3\u4e48\u8bbe\u8ba1\u9662\u7684\u5de5\u4f5c\u5c06\u7b80\u5355\u800c\u7f8e\u597d\u3002<br><br><strong>STEP 1 \u4e8c\u9636\u6548\u5e94<\/strong><br>\u4e8c\u9636\u6548\u5e94\u5c5e\u4e8e\u8377\u8f7d\u6548\u5e94\u7684\u5f71\u54cd\u56e0\u7d20\uff0c\u4e0d\u540c\u4e8e\u7ed3\u6784\u529b\u5b66\u5728\u672a\u53d8\u5f62\u4f53\u5efa\u7acb\u5e73\u8861\u65b9\u7a0b\uff0c\u4e8c\u9636\u5206\u6790\u662f\u5728\u5df2\u53d8\u5f62\u4f53\u4e0a\u5efa\u7acb\u5e73\u8861\u65b9\u7a0b\uff0c\u4e0b\u56fe\u662f\u5178\u578b\u7684\u4e8c\u9636\u6548\u5e94\u7684\u793a\u610f\u56fe\uff0c\u4e8c\u9636\u6548\u5e94\u4f1a\u653e\u5927\u7ed3\u6784\u5728\u4fa7\u5411\u529b\u4f5c\u7528\u4e0b\u7684\u5185\u529b\u548c\u4f4d\u79fb\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-2371dcacecdfb133b7891b81cb72014a_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p><br>\u76ee\u524d\u6709\u4e24\u79cd\u65b9\u6cd5\u8003\u8651\u4e8c\u9636\u6548\u5e94\uff0c\u5206\u522b\u662f<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u76f4\u63a5\u4e8c\u9636\u5206\u6790\u6cd5<\/li><\/ul>\n\n\n\n<p>\u76ee\u524d\u4e3b\u6d41\u7684\u7ed3\u6784\u5206\u6790\u8f6f\u4ef6\u90fd\u652f\u6301\u4e8c\u9636\u7ebf\u5f39\u6027\u5206\u6790\uff0c\u6ce8\u610f\u4e8c\u9636\u5206\u6790\u662f\u540c\u65f6\u8003\u8651\u6c34\u5e73\u529b\u548c\u7ad6\u5411\u529b\uff0c\u6240\u4ee5\u4e0d\u80fd\u4f7f\u7528\u4f20\u7edf\u7684\u7ebf\u6027\u8377\u8f7d\u7ec4\u5408\uff0c\u800c\u5e94\u5c06\u5e26\u5206\u9879\u7cfb\u6570\u7684\u6c34\u5e73\u529b\u548c\u7ad6\u5411\u529b\u540c\u65f6\u653e\u5728\u4e00\u4e2a\u5de5\u51b5\u4e2d\u8fd0\u884c\u5206\u6790\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4e00\u9636\u5206\u6790\u653e\u5927\u6cd5<\/li><\/ul>\n\n\n\n<p>\u5373\u4f20\u7edf\u7684\u8003\u8651\u4e8c\u5c0f\u6548\u5e94\u7684\u8fd1\u4f3c\u65b9\u6cd5\uff0c\u7f8e\u6807\u4e2d\u5bf9\u5e94\u7684\u7ae0\u8282\u662f AISC 360-16 Appendix 8\uff0c\u901a\u8fc7\u7cfb\u6570 B1 B2 \u653e\u5927\u6784\u4ef6\u4e00\u9636\u5206\u6790\u7684\u5185\u529b\u7ed3\u679c\uff0c\u540c\u65f6\u7cfb\u6570 B2 \u4e5f\u662f\u697c\u5c42 P-\u0394 \u6548\u5e94\u7684\u4f4d\u79fb\u653e\u5927\u7cfb\u6570\uff0c\u662f\u8861\u91cf P-\u0394 \u6548\u5e94\u7684\u91cd\u8981\u6307\u6807\uff0c\u7531\u697c\u5c42\u7ad6\u5411\u529b\u548c\u697c\u5c42\u4fa7\u5411\u521a\u5ea6\u51b3\u5b9a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-6c9d04b19397d9f0dccf45372bdcf897_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p><br><em>\u4e8c\u9636\u6548\u5e94\u653e\u5927\u4e86\u5206\u6790\u5185\u529b\u548c\u4f4d\u79fb\uff0c\u589e\u52a0\u4e86\u8377\u8f7d\u6548\u5e94\u3002<\/em><br><br><strong>STEP 2 \u5c48\u66f2<\/strong><br>\u5c48\u66f2\u662f\u6297\u529b\u7684\u5f71\u54cd\u56e0\u7d20\u3002\u7ec6\u957f\u7684\u6784\u4ef6\u53d7\u538b\u65f6\u6613\u4fa7\u5411\u5931\u7a33\uff0c\u8fd9\u79cd\u73b0\u8c61\u53eb\u505a\u5c48\u66f2\uff0c\u8fd9\u6837\u7684\u63cf\u8ff0\u867d\u7136\u4e0d\u4e25\u8c28\uff0c\u4f46\u8054\u7cfb\u6211\u4eec\u751f\u6d3b\u7ecf\u9a8c\uff0c\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-259c5c59048e7b799bd7dc9cb457cf9e_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p><br>\u4e24\u7aef\u94f0\u63a5\u8f74\u5fc3\u53d7\u538b\u6746\u4ef6\u7684\u6b27\u62c9\u5c48\u66f2\u8377\u8f7d\u4e3a\uff1a<br>\u8f74\u529b P = \u03c02EI\/l2<br>\u9664\u4ee5\u622a\u9762\u79ef A\uff0c\u5f97\u5230\u6b27\u62c9\u5c48\u66f2\u5e94\u529b Fe = \u03c02E\/(l\/r)2<br>\u4ee5\u957f\u7ec6\u6bd4 l\/r \u4e3a\u6a2a\u5750\u6807\uff0c\u622a\u9762\u5e94\u529b F \u4f5c\u4e3a\u7eb5\u5750\u6807\uff0c\u7ed8\u5236\u6784\u4ef6\u7684\u622a\u9762\u5e94\u529b\u66f2\u7ebf<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-3e9a9fa93f00542925be5cac87faadf1_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p><br>\u4ee5 Fy \u548c\u6b27\u62c9\u66f2\u7ebf\u7684\u4ea4\u70b9\u4e3a\u754c\u9650\uff0c\u957f\u7ec6\u6bd4\u5c0f\u4e8e\u754c\u9650\u65f6\u5c48\u670d\u5f3a\u5ea6\u63a7\u5236\uff0c\u957f\u7ec6\u6bd4\u5927\u4e8e\u754c\u9650\u65f6\u6b27\u62c9\u5c48\u66f2\u63a7\u5236\u3002<br>\u6881\u7684\u5c48\u66f2\u4e5f\u662f\u7c7b\u4f3c\u4e8e\u4e0a\u8ff0\u60c5\u51b5\uff0c\u56e0\u4e3a\u6881\u53d7\u5f2f\u65f6\uff0c\u4e00\u534a\u7684\u622a\u9762\u53d7\u538b\uff0c\u8fd9\u90e8\u5206\u622a\u9762\u503e\u5411\u4e8e\u5411\u5f31\u8f74\u5c48\u66f2\uff0c\u800c\u53d7\u62c9\u90e8\u5206\u7684\u622a\u9762\u963b\u6b62\u8fd9\u79cd\u4fa7\u5411\u5c48\u66f2\u7684\u8d8b\u52bf\uff0c\u6700\u7ec8\u8fbe\u6210 lateral-torsional-buckling \u7684\u4f34\u968f\u7740\u4fa7\u79fb\u548c\u626d\u8f6c\u7684\u4e2d\u95f4\u72b6\u6001\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-4c0eb5d886f86a37a63966e5cf4a53a4_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p><br>AISC 360-16 chapter E F \u53d7\u538b\u6784\u4ef6\u548c\u53d7\u5f2f\u6784\u4ef6\u7684\u8ba1\u7b97\u516c\u5f0f\u4e2d\u5305\u542b\u4e86\u5c48\u66f2\u7684\u5f71\u54cd\uff0c\u4f7f\u7528\u65f6\u5e94\u6ce8\u610f\u5047\u5b9a\u6761\u4ef6\uff0c\u5bf9\u4e8e\u67f1\u6784\u4ef6\u662f\u4e24\u7aef\u94f0\u63a5\u8f74\u538b\u5047\u5b9a\uff0c\u5bf9\u4e8e\u6881\u662f\u4e24\u7aef\u94f0\u63a5\uff0c\u626d\u8f6c\u7ea6\u675f\u4e14\u6cbf\u6784\u4ef6\u957f\u5ea6\u5747\u5300\u53d7\u5f2f\u7684\u5047\u5b9a\uff0c\u5f53\u5b9e\u9645\u6761\u4ef6\u4e0e\u9ed8\u8ba4\u5047\u5b9a\u4e0d\u540c\u65f6\uff0c\u8fd8\u9700\u8981\u7279\u6b8a\u8003\u8651\u3002<br><br><em>\u5f53\u6784\u4ef6\u8db3\u591f\u7ec6\u957f\u65f6\uff0c\u5c48\u66f2\u6548\u5e94\u964d\u4f4e\u4e86\u6784\u4ef6\u7684\u5f3a\u5ea6\uff0c\u4f7f\u5176\u65e0\u6cd5\u8fbe\u5230\u622a\u9762\u5c48\u670d\u5f3a\u5ea6\u3002<\/em><br><br><strong>\u6709\u4fa7\u79fb vs \u65e0\u4fa7\u79fb<\/strong><br>\u7531\u4e24\u7aef\u94f0\u63a5\u8f74\u5fc3\u53d7\u538b\u63a8\u5230\u7684\u516c\u5f0f\uff0c\u53ef\u4ee5\u6f14\u5316\u51fa\u5404\u79cd\u4e0d\u540c\u7684\u8fb9\u754c\u6761\u4ef6\u3002\u4e0d\u540c\u7684\u8fb9\u754c\u6761\u4ef6\u5e26\u5165\u5fae\u5206\u65b9\u7a0b\u540e\u5f97\u5230\u4e0d\u540c\u7684\u89e3\uff0c\u5c06\u4e0d\u540c\u7684\u89e3\u6574\u7406\u6210\u6b27\u62c9\u5c48\u66f2\u516c\u5f0f\u7684\u5f62\u5f0f\u540e\uff0c\u5dee\u5f02\u7684\u90e8\u5206\u5f52\u7eb3\u6210\u7cfb\u6570 \u8ba1\u7b97\u957f\u5ea6\u7cfb\u6570 k\uff0c\u6b64\u65f6\u6b27\u62c9\u5c48\u66f2\u5e94\u529b\u516c\u5f0f\u53d8\u4e3a Fe = \u03c02E\/(kl\/r)2\u3002\u7406\u60f3\u5316\u7684\u8fb9\u754c\u6761\u4ef6\u63a8\u5bfc\u7684\u8ba1\u7b97\u957f\u5ea6\u7cfb\u6570\u89c1\u4e0b\u8868<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-0ecaef46254c2e992007cc687890be91_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u7136\u800c\u73b0\u5b9e\u7ed3\u6784\u4e2d\u4e0d\u5b58\u5728\u7406\u60f3\u5316\u7684\u8fb9\u754c\u6761\u4ef6\uff0c\u6ca1\u6709\u5b8c\u5168\u7684\u94f0\u63a5\u548c\u521a\u63a5\u652f\u5ea7\uff0c\u5374\u90fd\u53ef\u4ee5\u7528\u5177\u6709\u4e00\u5b9a\u521a\u5ea6\u7684\u5f39\u7c27\u652f\u5ea7\u6765\u6a21\u62df\uff0c\u5982\u4e0b\u56fe\u6240\u793a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-eed2fced3dbf6bdff662b0f913dde964_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p><br>\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6c42\u89e3\u8ba1\u7b97\u957f\u5ea6\u7cfb\u6570 k<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u89c4\u8303\u67e5\u8868\u6cd5<\/li><li>\u8ba1\u7b97\u673a\u5c48\u66f2\u5206\u6790<\/li><\/ul>\n\n\n\n<p>\u6b64\u65f6\u5f15\u5165\u4e86\u6709\u4fa7\u79fb\u548c\u65e0\u4fa7\u79fb\u7684\u6982\u5ff5\uff0c\u6765\u63cf\u8ff0\u6846\u67b6\u5931\u7a33\u65f6\u7684\u5f62\u6001\uff0c\u56e0\u4e3a\u8fd9\u4e24\u79cd\u5f62\u6001\u5bf9\u5e94\u7684\u8ba1\u7b97\u957f\u5ea6\u7cfb\u6570 k \u7684\u8ba1\u7b97\u65b9\u6cd5\u4e0d\u540c\u3002<br>\u8fd9\u91cc\u8981\u5f3a\u8c03\u4e00\u70b9\uff0c\u89c4\u8303\u67e5\u8868\u6cd5\u6c42\u5f97\u7684 k \u503c\uff0c\u9664\u4e86\u4f53\u73b0\u4e0d\u540c\u7684\u8fb9\u754c\u6761\u4ef6\u4ee5\u5916\uff0c\u8fd8\u8d4b\u4e88\u4e86\u5176\u4ed6\u7684\u542b\u4e49\uff0c\u662f\u534a\u7ecf\u9a8c\u534a\u7406\u8bba\u7684\u6570\u503c\uff1b\u800c\u8ba1\u7b97\u673a\u5c48\u66f2\u5206\u6790\u5219\u5355\u7eaf\u4ece\u8fb9\u754c\u6761\u4ef6\u7684\u7406\u8bba\u5206\u6790\u6c42\u89e3\u7684\u3002<br><br><strong>STEP 3 \u521d\u59cb\u7f3a\u9677<\/strong><br>\u571f\u6728\u5de5\u7a0b\u8fd9\u4e2a\u53c8\u571f\u53c8\u6728\u7684\u4e13\u4e1a\uff0c\u65bd\u5de5\u8d77\u6765\u603b\u5b58\u5728\u8bef\u5dee\uff0c\u5bf9\u7c97\u58ee\u7684\u6df7\u51dd\u571f\u6784\u4ef6\u6765\u8bf4\u5f71\u54cd\u4e0d\u5927\uff0c\u4f46\u5bf9\u4e8e\u7ec6\u957f\u7684\u94a2\u7ed3\u6784\u6784\u4ef6\u7684\u5f71\u54cd\u5c31\u4e0d\u80fd\u5ffd\u7565\u4e86\uff0c\u94a2\u7ed3\u6784\u65bd\u5de5\u5b89\u88c5\u7ed3\u675f\u65f6\u5b58\u5728\u4e24\u79cd\u7f3a\u9677\uff0c\u4e00\u79cd\u662f\u6cbf\u6784\u4ef6\u957f\u5ea6\u7684\u521d\u59cb\u5f2f\u66f2\uff08out of straightness\uff09\uff0c\u53e6\u4e00\u79cd\u662f\u7ed3\u6784\u5782\u76f4\u5ea6\u7684\u504f\u5dee\uff08out of plumbness\uff09\uff0c\u8fd9\u4e24\u79cd\u7f3a\u9677\u7684\u5b58\u5728\u4f7f\u5f97\u67f1\u53d7\u538b\u65f6\u4f34\u968f\u7740\u5f2f\u77e9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-85e5fd4e8337cabb7980390fa0642cbb_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>AISC 360 \u5c06\u6784\u4ef6\u7f3a\u9677\uff08out of straightness\uff09\u5305\u542b\u5728\u8f74\u538b\u6784\u4ef6\u6297\u529b\u8ba1\u7b97\u516c\u5f0f\u4e2d\uff0c\u800c\u5c06\u4f53\u7cfb\u7f3a\u9677\uff08out of plumbness\uff09\u7b49\u6548\u6210\u6c34\u5e73\u529b notional load\uff0c\u52a0\u8f7d\u5230\u91cd\u529b\u4f5c\u7528\u70b9\u4e0a\uff0c\u4f7f\u5f97\u7ad6\u5411\u529b\u4f5c\u7528\u5728\u6709\u6c34\u5e73\u4f4d\u79fb\u7684\u7ed3\u6784\u4e0a\uff0c\u589e\u52a0\u4e86\u8377\u8f7d\u6548\u5e94\u3002<br><br><em>\u6784\u4ef6\u7f3a\u9677\u964d\u4f4e\u4e86\u6784\u4ef6\u5f3a\u5ea6\uff0c\u800c\u4f53\u7cfb\u7f3a\u9677\u589e\u52a0\u4e86\u8377\u8f7d\u6548\u5e94\u3002<\/em><br><br><strong>STEP 4 \u6b8b\u4f59\u5e94\u529b<\/strong><br>\u6b8b\u4f59\u5e94\u529b\u662f\u7531\u70ed\u8f67\u578b\u94a2\u5728\u51b7\u5374\u8fc7\u7a0b\u4e2d\u622a\u9762\u7684\u4e0d\u5747\u5300\u6536\u7f29\uff0c\u6216\u8005\u5728\u94a2\u7ed3\u6784\u52a0\u5de5\u3001\u710a\u63a5\u8fc7\u7a0b\u4e2d\u6b8b\u7559\u5728\u622a\u9762\u5185\u90e8\u7684\u521d\u59cb\u5e94\u529b\uff0c\u4e14\u5185\u90e8\u81ea\u76f8\u5e73\u8861\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-b71f9ef87b02cd414278a96ac6ac62f0_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u6b8b\u4f59\u5e94\u529b\u662f\u9020\u6210\u7ed3\u6784\u975e\u7ebf\u6027\u7684\u4e3b\u8981\u56e0\u7d20\uff0c\u5176\u4ed6\u56e0\u7d20\u8fd8\u5305\u62ec\u5f2f\u77e9\u7684\u5851\u6027\u53d1\u5c55\u548c\u8f74\u529b\u5bf9\u622a\u9762\u8f6c\u52a8\u521a\u5ea6\u7684\u6298\u51cf\u7b49\uff0c\u5728 AISC 360 \u4e2d\u90fd\u5f52\u7c7b\u5230\u7ed3\u6784\u975e\u7ebf\u6027\u5bfc\u81f4\u7684\u521a\u5ea6\u6298\u51cf\u3002\u7ed3\u6784\u975e\u7ebf\u6027\u5bfc\u81f4\u7684\u521a\u5ea6\u6298\u51cf\u5bf9\u6784\u4ef6\u6297\u529b\u548c\u8377\u8f7d\u6548\u5e94\u90fd\u80fd\u4ea7\u751f\u5f71\u54cd\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-5e9868bc28d075fcdb0b9795858bdca6_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5728\u6784\u4ef6\u6297\u529b\u65b9\u9762\uff0c\u56e0\u622a\u9762\u63d0\u524d\u5c48\u670d\u8fbe\u5230\u5f39\u5851\u6027\u9636\u6bb5\uff0c\u4e3a\u4e86\u63a7\u5236\u53d8\u5f62\uff0c\u89c4\u8303\u5c06\u67f1\u6297\u529b\u66f2\u7ebf\u8fdb\u4e00\u6b65\u964d\u4f4e\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-4971a410057eb47450ca7bc19f6e900c_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u8377\u8f7d\u6548\u5e94\u65b9\u9762\uff0c\u6784\u4ef6\u521a\u5ea6\u7684\u63d0\u524d\u9000\u5316\uff0c\u76f4\u63a5\u5f71\u54cd\u4e86\u7ed3\u6784\u5206\u6790\uff0c\u5bfc\u81f4\u53d8\u5f62\u589e\u5927\uff0c\u4e8c\u9636\u6548\u5e94\u589e\u52a0\uff0c\u7ed3\u6784\u5185\u529b\u589e\u5927\u3002<br><br><em>\u6b8b\u4f59\u5e94\u529b\u5bfc\u81f4\u7684\u521a\u5ea6\u6298\u51cf\u7684\u5b58\u5728\u964d\u4f4e\u4e86\u6784\u4ef6\u6297\u529b\uff0c\u589e\u5927\u4e86\u7ed3\u6784\u53d8\u5f62\u3002<\/em><br><br><br><strong>DM ELM FOM \u65b9\u6cd5\u5bf9\u6bd4<\/strong><br><br>DM: direct analysis method<br>ELM: effecitve length method<br>FOM: first order analysis method<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-d49d4c7748eb0196e93c9ff150687775_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u6b8b\u4f59\u5e94\u529b\u548c\u4fa7\u79fb\u5931\u7a33\u5bf9\u7ed3\u6784\u54cd\u5e94\u7684\u5f71\u54cd\uff0c\u4e0d\u540c\u7684\u65b9\u6cd5\u91c7\u7528\u4e86\u4e0d\u540c\u7684\u9014\u5f84\uff0c\u770b\u4f3c\u4e0d\u76f8\u5173\u7684\u9014\u5f84\u4e3a\u4f55\u80fd\u5b9e\u73b0\u540c\u6837\u7684\u76ee\u7684\u5462\uff0c\u5176\u80cc\u540e\u7684\u7406\u8bba\u539f\u56e0\u662f\u4e8c\u9636\u5206\u6790\u548c\u5c48\u66f2\u5206\u6790\uff0c\u672c\u8d28\u4e0a\u90fd\u662f\u7279\u5f81\u503c\u5206\u6790\uff0c\u4e24\u8005\u80fd\u63a8\u5bfc\u51fa\u76f8\u540c\u7684\u4e34\u754c\u8377\u8f7d\uff0c\u800c DM \u6cd5\u89c4\u907f\u4e86\u8ba1\u7b97\u957f\u5ea6\u7cfb\u6570 k \u503c\u7684\u8ba1\u7b97\uff0c\u5bf9\u4e8e\u4e0e\u89c4\u8303\u67e5\u8868\u6cd5\u6c42 k \u503c\u7684\u524d\u63d0\u6761\u4ef6\u6709\u51fa\u5165\u7684\u7ed3\u6784\uff08\u5373\u590d\u6742\uff0c\u4e0d\u89c4\u5219\u7ed3\u6784\uff09\u800c\u8a00\uff0cDM \u6cd5\u5927\u5927\u7b80\u5316\u4e86\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u5e76\u4e14\u80fd\u66f4\u771f\u5b9e\u7684\u53cd\u5e94\u7ed3\u6784\u53d7\u529b\u72b6\u6001\u3002<br><br>\u5728 2016 \u7248\u7f8e\u6807\u94a2\u7ed3\u6784\u8bbe\u8ba1\u89c4\u8303\u4e2d\uff0cFOM \u662f\u57fa\u4e8e DM \u6cd5\u7684\u4e00\u79cd\u7b80\u5316\u65b9\u6cd5\uff0c\u4f46\u9700\u8981\u6ee1\u8db3 Appendix 7.3.1 \u7684\u524d\u63d0\u6761\u4ef6\u3002DM \u548c ELM \u662f\u4e3b\u6d41\u7684\u7a33\u5b9a\u5206\u6790\u65b9\u6cd5\u3002<br><br><br>\u672c\u6587\u901a\u8fc7\u6982\u62ec\u6027\u7684\u4ecb\u7ecd\uff0c\u5b9a\u6027\u63cf\u8ff0\u7684\u5f71\u54cd\u56e0\u7d20\uff0c\u8bd5\u56fe\u5448\u73b0\u7ed9\u8bfb\u8005\u94a2\u7ed3\u6784\u7a33\u5b9a\u7684\u5927\u7684\u8f6e\u5ed3\uff0c\u800c\u5176\u4e2d\u7684\u8bf8\u591a\u7ec6\u8282\uff0c\u662f\u65e0\u6cd5\u5728\u4e00\u7bc7\u6587\u7ae0\u4e2d\u8bb2\u6e05\u695a\u7684\uff0c\u4e3b\u6d41\u7684\u94a2\u7ed3\u6784\u7a33\u5b9a\u7684\u7406\u8bba\u4e66\u7c4d\u5927\u7ea6\u6709\u4e0a\u5343\u9875\u7684\u7bc7\u5e45\uff0c\u5f88\u591a\u9ad8\u6821\u4e2d\u94a2\u7ed3\u6784\u7a33\u5b9a\u662f\u4e00\u4e2a\u5b66\u671f\u7684\u8bfe\u65f6\uff0c\u5bf9\u4e8e\u5df2\u5de5\u4f5c\u4eba\u58eb\uff0c\u5f88\u96be\u8fdb\u884c\u7cfb\u7edf\u7684\u5b66\u4e60\uff0c\u4f46\u5f53\u5b9e\u9645\u9879\u76ee\u4e2d\u9047\u5230\u4e00\u4e9b\u7279\u6b8a\u95ee\u9898\u65f6\uff0c\u786e\u5b9e\u9700\u8981\u624e\u5b9e\u7684\u7406\u8bba\u80cc\u666f\u77e5\u8bc6\uff0c\u624d\u80fd\u505a\u51fa\u6b63\u786e\u7684\u51b3\u7b56\uff0c\u7b14\u8005\u7684\u5efa\u8bae\u662f\u6709\u9488\u5bf9\u6027\u7684\u53bb\u7406\u89e3\u6982\u5ff5\uff0c\u7136\u540e\u66f4\u591a\u7cbe\u529b\u653e\u5728\u5982\u4f55\u6b63\u786e\u7684\u5e94\u7528\u7a33\u5b9a\u5206\u6790\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u6587\u672b\u9644\u4e0a Ronald D. Ziemian \u6559\u6388\u8bb2\u5ea7\u7684\u89c6\u9891\u94fe\u63a5\uff0c\u4f9b\u5927\u5bb6\u53c2\u8003\u5b66\u4e60\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u94a2\u7ed3\u6784\u7a33\u5b9a\u8bbe\u8ba1\u5411\u6765\u90fd\u662f\u7ed3\u6784\u5de5\u7a0b\u4e13\u4e1a\u7684\u96be\u70b9\uff0c\u91cc\u8fb9\u5145\u65a5\u7740\u8bb8\u591a\u62bd\u8c61\u3001\u96be\u7406\u89e3\u3001\u6613\u6df7\u6dc6\u7684\u6982\u5ff5\uff0c\u8001\u7248\u7684\u56fd\u6807\u94a2\u7ed3\u6784\u8bbe\u8ba1\u89c4\u8303\u672a\u80fd\u505a\u5230\u6e05\u6670\u7684\u3001\u51c6\u786e\u7684\u4f20\u9012\u7ed9\u5de5\u7a0b\u8bbe\u8ba1\u4eba\u5458\u7a33\u5b9a\u76f8\u5173\u89c4\u5b9a\uff0c\u5176\u4e2d\u7684\u4e00\u4e9b\u8fc7\u5206\u7b80\u5316\u3001\u6613\u8bef\u89e3\u7684\u89c4\u5b9a\u6761\u6b3e\uff0c\u8ba9\u5de5\u7a0b\u5e08\u5728\u9762\u5bf9\u771f\u5b9e\u3001\u590d\u6742\u7684\u9879\u76ee\u65f6\u7ecf\u5e38\u7f3a\u4e4f\u4fe1\u5fc3\u3002 \u672c\u6587\u5e0c\u671b\u501f\u52a9\u7f8e\u6807\u94a2\u7ed3\u6784\u7a33\u5b9a\u7684\u7406\u8bba\u548c\u65b9\u6cd5\u7684\u4ecb\u7ecd\uff0c\u8ba9\u8bfb\u8005\u5efa\u7acb\u8d77\u94a2\u7ed3\u6784\u7a33\u5b9a\u7684\u5168\u5c40\u89c2\uff0c\u7136\u540e\u5728\u8fd9\u79cd\u5168\u5c40\u8ba4\u77e5\u7684\u57fa\u7840\u4e0a\uff0c\u901a\u8fc7\u5de5\u7a0b\u5b9e\u8df5\u6216\u89c4\u8303\u5b66\u4e60\uff0c\u6162\u6162\u7684\u586b\u5145\u7ec6\u8282\u3002 \u6211\u4eec\u5c06\u4ece\u4e00\u4e2a\u57fa\u672c\u6982\u5ff5\u5f00\u59cb\uff0c\u9010\u6b65\u589e\u52a0\u94a2\u7ed3\u6784\u7a33\u5b9a\u5206\u6790\u4e2d\u7684\u5f71\u54cd\u56e0\u7d20\uff0c\u76f4\u81f3\u8fbe\u5230\u76ee\u524d\u89c4\u8303\u8981\u6c42\u7684\u6df1\u5ea6\uff0c\u5e76\u501f\u6b64\u5bf9\u6bd4 DM ELM FOM \u4e09\u79cd\u65b9\u6cd5\u5206\u522b\u5982\u4f55\u8003\u8651\u8fd9\u4e9b\u5f71\u54cd\u56e0\u7d20\u3002 \u7f8e\u6807\u4e2d\u6240\u6709\u7684\u6784\u4ef6\u7684\u5f3a\u5ea6\u9a8c\u7b97\u90fd\u53ef\u4ee5\u4ee5\u4e0b\u516c\u5f0f\u6765\u8868\u8fbeQ &lt; 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