支座编号如题6. 34图(b)所示,基本静定系的每个跨度均为简支梁,其中，[tex=1.786x1.214]054cILVxnGf3TV6qw9zwrg==[/tex],[tex=3.071x1.214]ZFY9MJxIgDyhXNKNjrCDSg==[/tex][br][/br]简支梁在外载荷作用下的弯矩图如题6. 34图(c)所示,则[br][/br][tex=13.071x2.429]uABZ7XTeIKgQrd8HfqbJsxlx2b/nPrVGF8S7lV6C7iBGLsuIz9hCNDgIsolHi0GEEvPlm8crW8ysHthqwKYfVpdU+tH4B/92wiQx4D3n1hk=[/tex]形心位置:[tex=12.643x2.429]sPUlDePiXfAGh1PQdxkWMp5AEELeCrtKUXdRWm26UzAkpiFKeebQY+9va9HOAbqpG+DH/vqrW59E87HtD01WPw==[/tex][br][/br]梁左、右为铰支座,有[tex=4.714x1.214]rrgYSnA/rWUiGoivEWB6Tg==[/tex][br][/br][img=811x276]17d8a6f02499e66.png[/img][br][/br]对 [tex=0.714x1.214]/9VPWMAe45DE7o41XjpmwQ==[/tex]和 [tex=0.714x1.214]6u7HMOUU+3yIS4FoZkCfDg==[/tex] 写三弯矩方程, 此时,[br][/br][tex=10.429x6.357]6Wof+uFXNuzxp7Fi2ZzvRrC9R4ggXq0Q3Erm+o03Rae8hDZEYvaRe0pLO9UUct8CcOEiyNHgUosTYkaROhB9IKUQzHJlUvtvGEcmJRAYM5aNKvC+lrGlLMHJFZmG+TdulWKy6H9q8ARXgfVjtpA+XJvDtDleNosRAxvoDLZbsMrEdUM4JJ6I3eNvlywKta4L[/tex]代入三弯矩方程得[tex=19.571x3.929]Qbx9Rt2RP5EwFCaVxl71WJbWxZkuXtWoT3gTquoGGPeTZVL6QYF0ypIdrLLwAATAn1pM5Yw95p0Q3rdTcBfYbNQynWHTwxZtjDXCf8T7FsDqYvTMijymuKwXY+taYNsNa614spCl3nlAV33TXVDwB7OkhuE7ck3tz9Q1sjEMPVw=[/tex][br][/br]由平衡条件得杆[tex=7.214x4.5]TH5+WYy6j/krWHUMW8/ZgRI8XsWieBg63/Qai7DJwsrjmvAdIospXvWyvnX7AY+sLIBzplkpctgYojpj2YhaVjgTqsm1e2PLZQE6xAZK+mA=[/tex][br][/br]得[tex=9.786x1.429]Kti4CV/Z1Siv4hUdGVQMprak2XWeoZboYb2IB0hCIW/+ZxXJ8SBOqmiHtnn9nCl/[/tex][br][/br]杆[tex=7.214x4.5]1lL4FQFyhucFWxyBQntSY62JrW67pnGYOipxYtmzL5QnGI1pFDP7yWPMERCU5+iSiTX4xOiqZk+G6aBo/ykhDdjzEspyoj6yQYQxoG1Srjc=[/tex][br][/br]得[tex=10.786x1.357]px8HwCFHHHcM78TPc5d9Cvt1mPbARbXtxoiVGBe8E/HBnuQ4bx5osv9FajFLLrUh[/tex][br][/br][tex=0.714x1.0]tvtB8rr3T9sn7Q/YdDnRow==[/tex]各支座反力为[tex=21.571x2.857]6EdgZ8gddepcKrHX55J5vfJ+jWcLazE7OKeI4MrYOrf4uECrhCPSd9A54TuxUH29cVDHkp3T1hlFu4uvJG0abNvA6UR4VhmKrhnO4tS3q9JAH4dihgETpi4jtDj2kSBWSRQO/69yYCCEG3BP2tRkb7yXy7Mk21ki9RnL9IEcKngho+wcDPcB5YneGn4RVw4jgEdYMB2KqAip99jnaUNLdQ==[/tex]