• 2022-06-16
    如题4-9图a所示刚架,如果支座[tex=0.786x1.0]Yn3GgEZev6SOu2r4v1WnCw==[/tex]发生图示支座位移,试求由此引起[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]点的竖向位移[tex=1.786x1.214]6PnONg+678+gSagJrgw68Q==[/tex][img=359x288]179e1aa0834d447.png[/img]
  • (1)在[tex=0.786x1.0]sHo1pKm+gjxjcUAJjHrarQ==[/tex]点加虚拟坚向单位荷载,如题4-9图b所示。(2)求支座[tex=0.786x1.0]b4HkKtHXeHofHX/gJc8Agg==[/tex]的支座反力[tex=10.786x1.286]8Mh3YKrvVotEeQrh/2hiMCc7DUCOtwIBzbYyU1RrpAhnR+eHCtRVwADj0MnjNtLf[/tex],[tex=14.5x2.0]W3N0JHCdDNj3JaOIYDTlsdb7UbGskclK+IktwEiXfYrR+rRQ7CHRz/0+jPMSQu3CbBCLzhpRPIF6N50StCH9MtmGfL+NL2w5SrQ2z2oLp4o=[/tex]解得[tex=3.857x2.429]dSUx4A4ty8rO1CAf8K4jN5VZMM9YdtMxE5jQOHZTESE=[/tex]则[tex=6.714x2.0]wi+PGGetCRckaSVi6YJTHWWWfW68rAiCa/1ht6TPbKhRIVKMhIHqEG4uA2EhJvjX[/tex][tex=11.357x2.786]++x5lpPilitujnJEtQrfpCiHDZTZW55/ZJZADeibTS8eReE7bAvoVkb/GDtRXTy2yInG4i7SEWRQ83quaoEPmQ==[/tex][tex=5.357x2.429]xvNU1VcZG5NELGyuBp3eTWFyAuQUQbiTRQO/Gq8q3ns=[/tex][img=351x290]179e1aac7a84f7d.png[/img][br][/br]

    举一反三

    内容

    • 0

      如题[tex=3.643x1.357]c6+a+tVZleozxkBKnBBAqA==[/tex]图所示,为使梁截面[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]的弯矩为零,试[br][/br]问弹性支座刚度[tex=0.571x1.0]CQkpoDeAAI+5FKIfe1wVCA==[/tex]应取多大?并求此时[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]点挠度。[img=329x366]179db5f7d3ced74.png[/img]

    • 1

      试求题[tex=3.643x1.357]C1Sgug4CieNvcehUx6WNyQ==[/tex]图所示三铰刚架[tex=0.786x1.0]XvHgf70VtK2FH5G93l0k3g==[/tex]点的水平位移和截面[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]的转角,设各杆[tex=1.214x1.0]aXJNSgwe9sYfky/Vv9M4JQ==[/tex]为常数。[img=294x359]179d77e0e038dbf.png[/img][img=295x375]179d77e4585a105.png[/img]

    • 2

      图 [tex=2.286x1.143]CSham/vPIP0iNbtoEXmen+wgEPesQ3V6WpoACfeAWJE=[/tex] 所示的刚架自重不计。已知 [tex=14.571x1.571]0QSXQtXu19o7WkYPQgZWBqgZbtBOxnZbWawClR15Q3VRTSyoLb5ixxaCbfFKrase0OfKjV+Ew1BBfp5Os2vKxsQF15Kw86r0yJZgDqq1yMAEtqPFD7hmDJZNf+2zaWJl[/tex], [tex=2.0x1.214]Jup0ChK5Oj/wyQ52yLmQHQ==[/tex] 为光滑铰链。试求支座 [tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex] 的约束力。[img=979x521]179d239df1f30e4.png[/img]

    • 3

      图 [tex=1.286x1.0]wJCncbEkuR4Biw4zTifd3w==[/tex]所示结构,由于支座移动,利用刚体虚功原理求指定处的位移。在图[tex=2.643x1.357]gt8zeUUfv4//t4XRTCiMZQ==[/tex] 中,已知支座 [tex=0.786x1.0]sHo1pKm+gjxjcUAJjHrarQ==[/tex]发生向下的坚向位移 [tex=0.5x0.786]hycNLgozeED/VkKdun7zdA==[/tex], 拟求 [tex=0.857x1.0]FfIhW8W8Jb8XV2jfmtoNZA==[/tex] 点的坚向位移。而在图 [tex=2.5x1.357]AEo6ga2gsdT1p4RoY5qfuQ==[/tex] 中,已知支座位移,求 [tex=0.786x1.0]sHo1pKm+gjxjcUAJjHrarQ==[/tex] 点的水平位移。[img=712x414]179c2de6266ea73.png[/img]

    • 4

      已知平行反应 [tex=0.786x1.0]Yn3GgEZev6SOu2r4v1WnCw==[/tex] [img=82x26]17af246275762db.png[/img][tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex] 和 [tex=0.786x1.0]Yn3GgEZev6SOu2r4v1WnCw==[/tex] [img=87x27]17af246efcb7d81.png[/img][tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex],且 [tex=3.571x1.214]gZbOcil7PtOc2MTlInyFuw==[/tex],为提高 [tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex] 的产量,应采取什么措施?