本文選題：橋梁 + 簡支箱梁��； 參考：《中國鐵道科學(xué)》2017年02期

【摘要】：根據(jù)對我國高速鐵路橋梁動力性能測試數(shù)據(jù)的分析和相關(guān)研究,將高速鐵路常用跨度簡支箱梁運(yùn)營性能的檢定劃分為抽樣橋梁的周期性檢定、提速橋梁的檢定以及運(yùn)營狀態(tài)異�；蛴兄卮笕毕莺蛽p傷等橋梁的檢定3類;檢定中以梁體的自振特性、豎向剛度(撓度和梁端轉(zhuǎn)角)和豎向動力響應(yīng)作為簡支箱梁運(yùn)營性能的豎向評定參數(shù),以梁體和橋墩的橫向振幅、無砟軌道相鄰梁端兩側(cè)的鋼軌支點(diǎn)橫向相對位移作為簡支箱梁運(yùn)營性能的橫向評定參數(shù)。根據(jù)對高速鐵路聯(lián)調(diào)聯(lián)試得到的橋梁動力性能實測樣本的統(tǒng)計分析并按可信度97.5%計算,分別給出250和350km·h~(-1)高速列車運(yùn)行速度下跨度為19.5~39.1m的預(yù)應(yīng)力混凝土簡支箱梁運(yùn)營性能評價參數(shù)的建議通常值:梁體豎向自振頻率分別為5.0~8.4和5.5~9.9 Hz,豎向阻尼比為2.0%~3.5%,撓跨比分別為1/12 000~1/48 00和1/11 000~1/7 200,梁端豎向轉(zhuǎn)角分別為0.30‰~0.65‰和0.25‰~0.45‰rad,跨中豎向和橫向振幅分別為0.20~0.35和0.10~0.15mm,跨中豎向振動加速度為0.25~0.40m·s~(-2),墩頂橫向振幅以墩全高與墩橫向平均寬度之比在0.5~4.2范圍內(nèi)為條件選取,無砟軌道相鄰梁端兩側(cè)的鋼軌支點(diǎn)橫向相對位移為0.5mm。針對預(yù)應(yīng)力混凝土簡支箱梁運(yùn)營性能評價參數(shù)的測試方法提出建議。
[Abstract]:Based on the analysis of dynamic performance test data of high-speed railway bridges in China and related research, the operational performance verification of commonly used span simply supported box girders in high-speed railway is divided into periodic verification of sampling bridges. There are three kinds of verification of speed-raising bridge, such as abnormal operation condition or serious defect and damage, in which the natural vibration characteristic of beam body is used in verification, Vertical stiffness (deflection and end rotation angle) and vertical dynamic response are used as vertical evaluation parameters of simply supported box girder. The transverse amplitude of beam and pier is calculated. The lateral relative displacement of rail fulcrum on both sides of adjacent beam ends of ballastless track is used as the transverse evaluation parameter of the operation performance of simply supported box girder. According to the statistical analysis of the measured samples of bridge dynamic performance obtained from the connection test of high-speed railway, the reliability of the bridge is calculated by 97.5%. The suggested parameters for evaluating the operation performance of prestressed concrete simply supported box girders with a span of 19.5 ~ 39.1 m at the running speed of 250 and 350km HX ~ (-1) are given, respectively. The vertical natural vibration frequencies of the beams are 5.08.4,5.50.9Hz. the vertical damping ratio is 2.0mm / 3.5H, and the deflection is 3.5hz. respectively. The ratio of 1 / 12 000 / 1 / 48 00 and 1 / 11 000 / 1 / 7 200, the vertical rotation angle of beam end are 0.30 鈥，

本文編號：1789059