试求图示桁架各指定杆件的内力。[img=444x318]17d2881d97f74f6.png[/img]
[img=349x214]17d28826ab54bc9.png[/img][tex=29.357x2.929]7RlQ6l4sSHY5MZNvlymBzhHUbEYBG3NFSgGtrp0INKBiI6CV93tu8avrZZ1UZE+v3BzSnP4DmPZIoKvRuO98z/0Si3nwf0gSSoYrFSD3aRDoiLZxhv+7UqmvSXRjnhgwmE3vsVUGLV33p/q8QEQMirB1sPFDMbCwfhay1DH1TnIYMZ+XKtVvrk+LNxrK5yttcf8mi58rY6MiT3Xf5hyJ6w==[/tex]再用节点法依次对[tex=3.214x1.286]Vb9WE3FO3CiNqvA8pu7BHAqcyudndnunUxlvLhQ3a8E=[/tex]节点进行分析, 容易求出[tex=18.429x2.643]mEXfa6w+BY0JTuLUTGSI/iAktK66FKTM1lare4aqHixWsoP928HeebhIlI+L3vYu+JJumq2D3aXaGfDbVF4ZT/47+oklxIpcMUW7d1KItJXK44QuqVkuJeXgdiULJVD8C6/ZBKs3go9O9ZLfYMmbD61hMBk2gOBn6FX2ARREsmU=[/tex]
举一反三
内容
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试求图示各桁架中指定杆的内力。[img=483x555]17ceafb8135306e.png[/img]
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求图示桁架指定杆的内力。[img=415x224]179c7634b582665.png[/img]
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试讨论图示桁架中指定杆内力的求法。[img=626x424]17ceae8a6b189ed.png[/img]
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图示结构中桁架b杆的内力为F。[img=276x178]180316f3a878f79.png[/img]
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试求图示杆件指定截面上内力分量，并指出相应的变形形式。[img=491x256]179aca43022993b.png[/img]