橋梁微講堂-有效寬度理解和應(yīng)用 教學(xué)課件

橋梁專業(yè)微講堂第一頁(yè)，共十八頁(yè)。概念及規(guī)范有效寬度概念04規(guī)范計(jì)算規(guī)定新規(guī)范計(jì)算規(guī)定1影響系數(shù)計(jì)算及程序設(shè)置影響系數(shù)計(jì)算程序中兩種實(shí)現(xiàn)方式計(jì)算剪力滯效應(yīng)可行性實(shí)體模型頂?shù)装鍛?yīng)力圖考慮有效寬度應(yīng)力CONTENTS23第二頁(yè)，共十八頁(yè)。1概念及規(guī)定第三頁(yè)，共十八頁(yè)。01概念及規(guī)定有效寬度概念

針對(duì)實(shí)際中剪力滯效應(yīng)，提出了有效寬度的概念：即將翼緣實(shí)際寬度按某個(gè)系數(shù)或者某種規(guī)律折減為計(jì)算寬度，使折減后的寬度按初等梁理論算得的應(yīng)力值和實(shí)際的峰值接近，以確保結(jié)構(gòu)的安全。第四頁(yè)，共十八頁(yè)。04規(guī)范規(guī)定01概念及規(guī)定第五頁(yè)，共十八頁(yè)。01概念及規(guī)定第六頁(yè)，共十八頁(yè)。新規(guī)范總校稿規(guī)定01概念及規(guī)定第七頁(yè)，共十八頁(yè)。2影響系數(shù)計(jì)算及程序設(shè)置第八頁(yè)，共十八頁(yè)。影響系數(shù)計(jì)算計(jì)算步驟：

A：劃分腹板兩側(cè)的翼緣的實(shí)際寬度bi；B：計(jì)算翼緣有效寬度的計(jì)算系數(shù)ρf、ρs；C：計(jì)算有效寬度bmi；D：計(jì)算bmi相關(guān)的截面特性值Iyy；02影響系數(shù)計(jì)算及程序設(shè)置第九頁(yè)，共十八頁(yè)。Part坐標(biāo)原截面換算后Iyy剛度調(diào)整系數(shù)換算后hcIyyczpczm2-I0.6511.0758.0037.7710.9710.9381.0623-I1.51.0758.0037.8190.9770.9341.0664-I41.1196.4846.3740.9830.8861.1145-I6.621.1196.4846.3740.9830.8861.1146-I9.241.1196.4846.3740.9830.8861.1147-I11.861.1196.4846.3740.9830.8861.1148-I14.481.1196.4846.3740.9830.8861.1149-I17.11.1196.4846.3740.9830.8861.11410-I17.21.1196.4846.3740.9830.8861.11411-I17.71.1196.4846.3740.9830.8861.11412-I17.81.1196.4846.3740.9830.8861.11413-I20.431.1196.4846.3740.9830.8861.11414-I23.061.1196.4846.3740.9830.8861.11415-I25.691.1196.4846.3740.9830.8861.11416-I28.321.1196.4846.3740.9830.8861.11417-I30.951.1196.4846.3740.9830.8861.11417-J33.451.0758.0037.8430.9800.9341.06618-J34.951.0758.0037.7710.9710.9381.06202影響系數(shù)計(jì)算及程序設(shè)置第十頁(yè)，共十八頁(yè)。程序設(shè)置第一種方法：結(jié)構(gòu)—PSC橋梁建模助手—有效寬度注意：需要定義跨度信息

只能計(jì)算對(duì)稱結(jié)構(gòu)02影響系數(shù)計(jì)算及程序設(shè)置第十一頁(yè)，共十八頁(yè)。第二種：邊界—有效寬度表格輸入手算參數(shù)適用于對(duì)稱和不對(duì)稱結(jié)構(gòu)。02影響系數(shù)計(jì)算及程序設(shè)置第十二頁(yè)，共十八頁(yè)。3計(jì)算剪力滯效應(yīng)可行性第十三頁(yè)，共十八頁(yè)。03計(jì)算剪力滯效應(yīng)可行性FEA實(shí)體模型—底板應(yīng)力實(shí)際分布單元靜力荷載工況截面位置Sig-xx(總和)(N/mm^2)11MVmax中載Pos-32.10311MVmax中載Pos-42.103SUM26.733單梁結(jié)果腹板處值有效寬度（m）

2.4651.6344.0282.3341.6343.8132.3341.6343.8132.3101.6343.7742.3101.6343.7742.3741.6343.879SUM23.081實(shí)體考慮有效寬度結(jié)果第十四頁(yè)，共十八頁(yè)。FEA實(shí)體模型—頂板應(yīng)力實(shí)際分布單梁結(jié)果實(shí)體考慮有效寬度結(jié)果單元荷載截面位置Sig-xx(總和)(N/mm^2)11MVmax中載My9Pos-1-1.38111MVmax中載My9Pos-2-1.381SUM-23.760腹板處值有效寬度（m）

1.8042.3164.1781.8041.6342.9481.9061.6343.1141.9061.6343.1141.9251.6343.1451.9251.6343.1451.911.6343.1211.911.9193.665SUM26.43203計(jì)算剪力滯效應(yīng)可行性第十五頁(yè)，共十八頁(yè)。概念及規(guī)范1影響系數(shù)計(jì)算及程序設(shè)置計(jì)算剪力滯效應(yīng)可行性CONTENTS23第十六頁(yè)，共十八頁(yè)。謝謝您的聆聽2017-4第十七頁(yè)，共十八頁(yè)。內(nèi)容總結(jié)橋梁專業(yè)微講堂。題目：有效寬度理解及應(yīng)用主講人：田亞寧。北京邁達(dá)斯技術(shù)有限公司|技術(shù)中心出品。影響系數(shù)計(jì)算程序中兩種實(shí)現(xiàn)方式。實(shí)體模型頂?shù)装鍛?yīng)