橋梁工程南京理工大簡(jiǎn)支梁橋計(jì)算橫隔梁內(nèi)力計(jì)算PPT課件

1、rlala人群arrrlpqP0r1.作用于橫隔梁上的荷載作用于橫隔梁上的荷載 Load distributed on transverse beam 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam 第1頁(yè)/共21頁(yè).偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beamn計(jì)算模型計(jì)算模型 Model橫隔梁相當(dāng)于彈性支撐上的連續(xù)梁橫隔梁相當(dāng)于彈性支撐上的連續(xù)梁continuous beam on elasti

2、c support Ri=?PR1R2R3R4R5P 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam 第2頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力 當(dāng)荷載P作用于r截面左邊時(shí)，截面上的彎矩和剪力：R1R2R3R4R5P=1reb1b2P=1.偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam ebReb

3、RbRMiir左122111121左irRRRQ第3頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力 當(dāng)荷載P作用于r截面右邊時(shí)，截面上的彎矩和剪力：R1R2R3R4R5P=1rb1b2P=1右iirbRbRbRM2211右irRRRQ21 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam .偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam第4頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力 aar截面彎矩影響線(xiàn)P=1e1r截面剪力影響線(xiàn)P=1

4、e 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam .偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam第5頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力影響線(xiàn)一般橫隔梁的彎矩在靠近橋中心線(xiàn)的截面較大，如A、B截面剪力則在靠近橋兩側(cè)邊緣處的截面較大,如C、D截面 P=1A BCD 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam .偏壓法計(jì)算橫隔梁內(nèi)力偏壓法

5、計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam第6頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力影響線(xiàn) 1116R1R2R321263136梁處橫隔梁截面的彎矩影響線(xiàn)dddM22211131ddM3231233ddM2616236M31M33M36.偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on tra

6、nsverse beam 第7頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力影響線(xiàn) 梁處橫隔梁截面的彎矩影響線(xiàn)dddM22211131ddM2616236M31M36aa2d 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam .偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam第8頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力影響線(xiàn) 梁、梁之間橫隔梁截面的彎矩影響線(xiàn)ddddM5 . 25 . 05 . 15 . 23121111)43(ddd

7、M5 . 05 . 15 . 23626166)43(M(3-4)1M(3-4)62.5d 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam .偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam第9頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力影響線(xiàn) 梁處橫隔梁截面的剪力影響線(xiàn)1211121 右右Q261626 右右QQ21Q2611 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on tra

8、nsverse beam .偏壓法計(jì)算橫隔梁內(nèi)力偏壓法計(jì)算橫隔梁內(nèi)力Computing the internal force based on the stiffness transverse beam第10頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力計(jì)算 l確定作用在中橫隔梁上的計(jì)算荷載 akkkkqlqyPqyPP11021)(21Pklay1qkla 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam 第11頁(yè)/共21頁(yè)n 橫隔梁的內(nèi)力計(jì)算l繪制中橫隔梁的內(nèi)力影響線(xiàn)l布置荷載，計(jì)算截面內(nèi)力 iqPS01Q21Q26M31M36P/2P/2P/2P/2 5.5橫隔梁內(nèi)力計(jì)算Computing the internal force on transverse beam l荷載組合忽略橫隔梁恒載內(nèi)力，只考慮活載組合第12頁(yè)/共21頁(yè)【例】仍以前述五梁式裝配式鋼筋混凝土簡(jiǎn)支梁橋?yàn)槔b配式鋼筋混凝土簡(jiǎn)支梁橋跨中橫梁在2號(hào)