载荷集度(图 [tex=2.0x1.357]J49YVW52E8iw5JAjEZpJKRcEHYY/JCOa7xbjjjMdxOE35j+5N6ySeT3ixur03EX2[/tex] 为A B 段 [tex=14.5x2.429]42ixrAL/wIFsbIbvtduofp5c7VyaIuzXJvOCytmhZStKXjoJFy/Nwq/1mqnVQo0ndPmHZyHqJ/vzfPxfIsRYvgpgabJI8z8LocRqFWl+gos=[/tex]B C 段 [tex=16.214x2.786]nz1GnfzZjfM7S8dPrjcbf+ErSmanJaqlBEonWcL6FetFPdCoIggZcZXI2z5aRVlqhOi0PEFMKWWFZiL2pwjkX3BxkhFUxN/EByTpRf+2v3hoxyVwvD2Y+xyoUrL5+y/S[/tex]支座反力为[p=align:center][tex=8.929x5.214]UD5Uh4Sf0JOreHxD3gt15ilW/uh4fsiNjFpMBKcgj75Mt+bCPOi64LyIGGzWJYcsh9QhnuigeVRJelUEyFSzgfmFB7Cs6GC3/lAJZ6MjO/mnT2tFMfel60J+TKQJlEdZxUx8aN9qVBZ4SB6AJkdjtDVnHspwyXmIKFSC+Cg5U+wrtROkv/bm2WI/5jgfwbzI6WPs5U+35o10oNeTeRoZoA==[/tex][tex=1.357x1.214]9vNFGpvg5iNlAamlfDOnHQ==[/tex] 为 A B 段 [tex=2.214x1.357]5BJnXMLhGUMWz6F5NsloMg==[/tex] 的合力, [tex=1.357x1.214]iHrJQQZxfJVNZWeqOT9VKg==[/tex] 为 B C 即 [tex=2.214x1.357]Dz6inWaiej4YtQl8J1NBhA==[/tex] 的合力。应用平衡条件求得支座反力[p=align:center][tex=10.214x2.429]9H3Wn8cGxBBeWfrpzFALqyG6q0Y7KKUjMoePFs2gDTJIZeSufoT3P4kg9iAsAljGebjb54UszYfYlDhzMkvSgQG+F6I6sOzbL0JPn8RhMXQ=[/tex]剪力方程为A B 段[p=align:center][tex=17.0x10.214]7kwyE/MuqDvh/vX9SOSVTh3SQQ0P6hDPj/Ks6fG6U5BunFxvkhXXMuQsef5LlTmrGI6eRYluVw/QIWQcLZ6pa6oWjRZItMrwIzDetRP9vVXXIIQNWN1GhSJrqn6Yd9FW7uOUWegg85FVptwIF/BPbyVii6iMWd2E2g54hFHW89Ke21fqEvF1JFmp0+xD941wV4qLAsnWz1sf4tZyXrPGwJ6cQ8ypIlPevQLtNPLmwVRpl1g6NHs7BlPUSLLc6D5fn5B9qSLLBCeV0jKVgzGqlHIbu+Unpgkajhs+wEwxKviqP/k8TF8Rc7lqfoy0VbygQQpiuuRtj/j09DyuVqaNFogT65P1g1YsVjCMnUrO0AIdlrwRSMkHK92Szn9Vs4fVaLOInUwupome5VVsauJSwQ==[/tex]B C段[p=align:center][tex=25.643x7.643]7kwyE/MuqDvh/vX9SOSVTvxpm2K/YAwgQZ82PBbyjUY+zojnZuo9Dw93Bm/41EADxJY4JRXtI39G3+c02r7otOk8IjsViqVSwyyJVGlyskMEiIFB6DIAyH2hAgKKap4eksYz/WratGsuJUPBq9AqclUdRcYAZfSNtNJoD/Cpr9kxdj8CiMq7AcSAT6kWc2wMwyGxot1ruSV1vlQIY+JqaQITDLuKBDuRhciJ9/+UNTR9IMwpp0PLtNbekS2h4WO8jFP9mA7e4Lgx5F7k0mtXlYkAwFmkGTKVeNdyVSxdwAFPN/2MX8IxXBWIGFCWOEHkRtw8q3oTqbrsOXA+TzwaZP93JVZiHFSJ+UDsGJUbQ5nL8N/sO3Lpz/DdgfeckGK0HoXqqpgUML4PppqQvgBbcdDeq/UB/NwviQUKL7KtCrw=[/tex]弯矩方程为A B 段 [tex=24.571x2.714]UF+oLkABrjExFmVxGJKQwjxuRwwH0P63Z/gAsuJHI+tCYM5+ipbC09d0ojoqsaiDYjrdwGh4Y/0T16ECFYAlf7NzeL1HKnlcx30FTACRJ6aDKxfgf8NNRKHKhvvu1W9oGq/zS84gUV5oZZ22u67yzr/CDRbcxsCmCl5F0KaClZmIu6nPXDsSgfnnp+YKvXkx[/tex]B C 段[p=align:center][tex=23.5x5.143]3R8A/Ip0TZ+UgfIsh0ICfSgo/97vzRg8N0lMfUUKtH5hydqxrfjWbnkaO5kbYsTVFL9Xo5ZRKYWN/GaXf3CSuN0v6vANWXaxhis0auVc5XHqytj8LVfpZJEYlGp6pjzQZsa0tE3wtH572+BhIc43+9NCMUC3wsoN6SV7LU3ne63AOoV4IqrObYiS3NjKxzWfag9QTG3LamlNmWxttv94rz6iR7aRD40Ot7EBms1KFSDJj75N4GAtGV5dm4J6rsFQC5r5NbnFL3UodZY5qfHc1w==[/tex]作剪力图和弯矩图分别如图 [tex=1.571x1.357]tVoP+7A5STQ6/H9BnBpwtpNyphi9coAfWuEbx6U9N98=[/tex] 和 [tex=1.571x1.357]wqlnrF9U37S1D/y4tuOMgWn847Jq0KOWuTrrqZTdlaA=[/tex] 所示。 在 A B 段 [tex=4.071x1.357]2nkFDQGmY+SEFvDDKmnDOw==[/tex] 处, [tex=2.714x1.357]dBgqTQen78e/vpQkRnW2ww==[/tex] 有极值, 即[p=align:center][tex=10.214x2.357]KD1lb/VYbffzQiCky3Jr1iHtgdUr1H3vna8XqyYdV7ZyPk5p0XxJ9Oxqaf+u4mOaguYYE4ZCXVpIfRGInsVw8N3jdtPb39sjV5bAEOtq77EYjtDoZ3TdP+r3prmOpxVp[/tex]解上式得 [tex=9.0x2.643]OJGAlfLocSDzhx0K+F/PpWfNwuaDZwlodDXryYiUTOxi8a4u463+Gc2qUfq8rgFShtGE9DHx67GidfgHd3jOQw==[/tex]将上式代入弯矩方程可得[p=align:center][tex=24.5x3.714]+ozYiNEoyT1Hd0QZdueHb9tiLiLX9d4QpxiID4EBA9cyANkWTYWQRMEFyKXYqv0WSxaHGlA8h38JX1CozTVxdTu5NaKGjoIqgdHiJTQcPYl2/wZsl7482FS2U2Zsi3O1H/rIu+gzWOmjy4fxpb2+UOraVsNMsZe/NI+/UuSkN/FkSLiqMpUrHCzV1iNEE7jg4c/Zw2R6ILRCOMLo7F1QDg==[/tex]将 [tex=1.714x1.0]OFSQaAQTidbnVE7HphlqPw==[/tex] 代人[tex=2.714x1.357]dBgqTQen78e/vpQkRnW2ww==[/tex] 或 [tex=2.714x1.357]lRHZRxaeidzNJMGLOs9ZIQ==[/tex] 中, 可得最大弯矩。最大剪力和弯矩为[p=align:center][tex=6.5x4.786]WVJ9Y4shPEON7Yx83Mfa7VD8V+KhK0nyCU6SzuOAV4RobY3r2kcdj/j23Kkr42dSnw00/sAEnzntTRzH5voDEksq8jo8icIPNC3dkc1s7IoNj7z4uWk1ZGDk6cAvJ/JnFyWO0KWF+Oxwj1udBle8Cg==[/tex][p=align:center][img=403x559]17a7bd9e432577d.png[/img]