-102+0.53=1.04m,不利布置如图(图应画出,占2分,此处略去),每延米宽板带的荷载为。Р=24.98kNР=0.11/(1.3-0.14)<1/4,=0.5×24.98=12.49kN,Р=-0.7×24.98=17.49kNР(8分)Р后轮=140kN,=0.6m×0.2m。Р后轮压力面积为:=0.2+2×0.11 = 0.42m,=0.6+2×0.11 = 0.82m。Р不利布置如图(图应画出,占2分,此处略去)。按一个后轮计算的板有效分布宽度为=0.42+2×0.71= 1.84m > 轮间距1.4m。故两后轮压力面积重合,=0.42+1.4+2×0.71= 3.42m。每延米宽板带的荷载为。Р=16.36kN。Р(8分)Р后轮=140kN,=0.6m×0.2m。Р后轮压力面积为:=0.2+2×0.11 = 0.42m,=0.6+2×0.11 = 0.82m。Р不利布置如图(图应画出,占2分,此处略去)。按一个后轮计算的板有效分布宽度为=0.42+2×0.71= 1.84m > 轮间距1.4m。故两后轮压力面积重合,=0.42+1.4+2×0.71= 3.42m。每延米宽板带的荷载为。Р=46.08kN/m。Р(5分)Р杠杆原理法绘制2号主梁影响线,如图(图应画出,占3分,此处略去)Р不利布置如图,Р(7分)Р=0.6;= -0.2;Р得=-1.6即4号梁肋处;Р偏压法绘制1号主梁影响线,如图(图应画出,占2分,此处略去)。Р不利布置如图,尽量靠左布置2列(图应画出,占2分,此处略去):Р(7分)Р=0.6;=0.4;Р=0.2;=0.2。Р1号梁肋处的值:=0.6×2×1.6+0.4×1.6-2×1.6=-0.64,Р3号梁肋处的值:=0.2×2×1.6+0.2×1.6=0.96,Р5号梁肋处的值:=-0.64。Р影响线如图(图应画出,占3分,此处略去)
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