一、恒载内力计算
1.1分别计算各主梁的恒载集度
(1)主梁自重:
支点处:q1=[0.5×1.3/2×(0.12+0.2)×2+0.3×1.3]×25 =14.95kN/m
跨中处:q2=[0.5×1.42/2×(0.12+0.2)×2+0.18×1.3]×25=11.53kN/m
g1=[2×(14.95+11.53)×4.79/2+11.5×9.92]/19.5=12.35kN/m
(2)横格梁:
支点处:V1=0.16×[1.3×0.9+1.3×(0.2-0.12)/2-0.82×0.48]=0.13m³
跨中处:V'1=0.16×[1.42×0.9+1.42×(0.2-0.12)/2-0.82×0.48]=0.15m³
作用于中梁上横格梁自重:g2=(2×0.13+3×0.15)×25/19.5=0.91kN/m
作用于边梁上横格梁自重:g'2=g2/2=0.91/2=0.46kN/m
(3)桥面铺装:g3=[0.02×7×22+(1.5%×3.5×7/2+0.06×7)×24]/6=2.93kN/m
(4)人行道(包括栏杆):g4=2×6/6=2kN/m
合计:
边梁恒载:g=g1+g'2+g3+g4=12.35+0.46+2.93+2=17.74kN/m
中梁恒载:g=g1+g2+g3+g4=12.35+0.91+2.93+2=18.19kN/m
1.1分别计算各主梁的恒载集度
(1)主梁自重:
支点处:q1=[0.5×1.3/2×(0.12+0.2)×2+0.3×1.3]×25 =14.95kN/m
跨中处:q2=[0.5×1.42/2×(0.12+0.2)×2+0.18×1.3]×25=11.53kN/m
g1=[2×(14.95+11.53)×4.79/2+11.5×9.92]/19.5=12.35kN/m
(2)横格梁:
支点处:V1=0.16×[1.3×0.9+1.3×(0.2-0.12)/2-0.82×0.48]=0.13m³
跨中处:V'1=0.16×[1.42×0.9+1.42×(0.2-0.12)/2-0.82×0.48]=0.15m³
作用于中梁上横格梁自重:g2=(2×0.13+3×0.15)×25/19.5=0.91kN/m
作用于边梁上横格梁自重:g'2=g2/2=0.91/2=0.46kN/m
(3)桥面铺装:g3=[0.02×7×22+(1.5%×3.5×7/2+0.06×7)×24]/6=2.93kN/m
(4)人行道(包括栏杆):g4=2×6/6=2kN/m
合计:
边梁恒载:g=g1+g'2+g3+g4=12.35+0.46+2.93+2=17.74kN/m
中梁恒载:g=g1+g2+g3+g4=12.35+0.91+2.93+2=18.19kN/m