剛度橋梁模板計(jì)算據(jù)橋梁模板計(jì)算荷載則剛度驗(yàn)算荷載:q=q，二17.31N/lm3考慮安全撓度按簡(jiǎn)支梁橋梁模板計(jì)算，橋梁模板計(jì)算跨度SOOmmE二1x104N/mm2I=bh3/12=90x903/12=547x104mm4Amax=Sq甘/384EI=5x17.31x5004/384x1x104x547x104二0.26mm<=L/400=500/400=1.25mm剛度滿足要求。外楞檢算(248x3鋼管)外楞間距@SOOmm水平布置，根據(jù)橋梁模板計(jì)算荷載則強(qiáng)度驗(yàn)算荷載:P二(qi+qz)xL二(17.31+1.4)x500=9355N強(qiáng)度橋梁模板計(jì)算考慮安全因素單跨簡(jiǎn)支梁橋梁模板計(jì)算，橋梁模板計(jì)算跨度SOOmm(即對(duì)拉桿間距)。跨內(nèi)最大彎距:M=1/4pL=1/4x9355x500=1.17x106N·mm又:W=4.49x103x2=8.98x103mm故:=M/W=1.17xlOb/B.98x1O3=130.29N/mm2<。j=215N/mmz(鋼材)剪力按三跨連續(xù)梁橋梁模板計(jì)算跨內(nèi)最大剪力，橋梁模板計(jì)算跨度SOOmm得:V=2p二2x9355=18710N又:A=424x2=848mm2故:=3V/2A=3x18710/2x848=33.09N/mmZ<二125N/mm2(鋼材)強(qiáng)度均滿足要求。剛度橋梁模板計(jì)算根據(jù)橋梁模板計(jì)算荷載確定剛度驗(yàn)算荷載:P二q,xL=17.31x500=8655N撓度按單跨簡(jiǎn)支梁橋梁模板計(jì)算，橋梁模板計(jì)算跨度SOOmmE=2.1x105N/mm2I=10.78x104x2=21.56x104mm4wmax=pL3/48EI=8655x5003/48x2.1x105x21.56X104=0.498mm<=L/400二500/400=1.25mm(結(jié)構(gòu)表面外露)剛度滿足要求。3.2.3對(duì)拉螺栓橋梁模板計(jì)算對(duì)拉桿間距橫向@SOOmm、豎向@SOOmm設(shè)置，根據(jù)驗(yàn)算荷載則所承受的拉力:P=(57.69kN/m2x1.2+4kN/mzx1.4)x0.5mx0.5m=18707N選用M16對(duì)拉螺栓，查《路橋施工橋梁模板計(jì)算手冊(cè)》:允許拉力=24500N>18707N，符合要求。www.cqwxsh.cn
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