M3?2.2?(2?1.5)?2.4?253-3 q3?(1.5?1.5?2)?1.1?2.4?25?330 1?(2?1.5)/2??1.2?2?22.4?25?(1.33?1.5)?604.5 -330 -330 M4?[2.2?(2?2)4-4 q4?2.2?2.4?1?25?126.74 ?2.4?2?0.5?2?1.2?2.4? 4(?2)]?253?816 -456.72 -456.72 M5?[2.2?(2?1.5?95-5 q5?8?2.2?2.4?25?1056 4)?2.4?0.5?0.5?2?1.2?2.4?(?1.5?9)] 3?25?9460.54-1515.72 -1512.72 12.1.3：活载内力计算： （1）：活载横向分布系数计算、荷载对称布置时用杠杆法，非对称布置时用偏心受压法。
1单列车对称布置时：如下图12-2 ○
90901.00.91号0.09
?1??8?0.5 ?2??4??3??5??6??7?0
2双列车对称布置：如图12-3 ○
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?1??8??2??7?0
1?4??5??(0.795?0.2045?0.386)?0.693
21?3??6??0.614?0.307
23单列车、非对称布置时：(图12-4) ○
18050 由?i?1eai?已知n=8、e=5.6
2?a2n
2?a2=203.28 15.6?7.715.6?5.5?0.337 ?2???0.277 则：?1??8203.288203.2815.6?3.3?3???0.216
8203.28
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