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MA=PL/4 MA=PL/8 MA=PL/12 MA=PL/24
Pl3/40EI 4Pl3/18EI Pl3/3EI 4Pl3/36EI
Pl2/16EI Pl2/12EI Pl2/8EI Pl2/4EI
when; took before; took since; had before ; had
Pl/2(左侧受拉) Pl/4(左侧受拉) Pl/2(右侧受拉) Pl/4(右侧受拉)
Pl3/6EI Pl3/3EI Pl3/6EI Pl3/3EI
Pl/12EI Pl/8EI Pl/16EI Pl/4EI
Pl/6 2Pl/3 17Pl/24 -4Pl/3