水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2015年
3期
17-23
,共7页
连续箱梁桥%标准车辆荷载%承载能力极限状态%荷载组合效应
連續箱樑橋%標準車輛荷載%承載能力極限狀態%荷載組閤效應
련속상량교%표준차량하재%승재능력겁한상태%하재조합효응
continuous box girder bridge%standard vehicle load%the bearing capacity limit state%vehicle load effect
车辆荷载模式随着中国桥梁相关规范的更新亦有相应调整,为了解现存连续箱梁桥在新的车辆荷载模式下的结构响应,分别选用《城市桥梁设计准则》(CJJ1l -93)、《城市桥梁设计荷载标准》(CJJ77-98)、《城市桥梁设计规范》(CJJ11-2011)3种不同版本规范中的标准车辆荷载。选取一座旧桥利用 Midas/Civil 建模分析。研究结果表明,对于连续箱梁桥,必须加强各跨跨中抗弯和中墩墩顶处的抗剪验算;同时,该桥的初始设计汽-超20级荷载不能满足“11”规范城-A 级车道荷载边跨跨中最大弯矩的验算要求。
車輛荷載模式隨著中國橋樑相關規範的更新亦有相應調整,為瞭解現存連續箱樑橋在新的車輛荷載模式下的結構響應,分彆選用《城市橋樑設計準則》(CJJ1l -93)、《城市橋樑設計荷載標準》(CJJ77-98)、《城市橋樑設計規範》(CJJ11-2011)3種不同版本規範中的標準車輛荷載。選取一座舊橋利用 Midas/Civil 建模分析。研究結果錶明,對于連續箱樑橋,必鬚加彊各跨跨中抗彎和中墩墩頂處的抗剪驗算;同時,該橋的初始設計汽-超20級荷載不能滿足“11”規範城-A 級車道荷載邊跨跨中最大彎矩的驗算要求。
차량하재모식수착중국교량상관규범적경신역유상응조정,위료해현존련속상량교재신적차량하재모식하적결구향응,분별선용《성시교량설계준칙》(CJJ1l -93)、《성시교량설계하재표준》(CJJ77-98)、《성시교량설계규범》(CJJ11-2011)3충불동판본규범중적표준차량하재。선취일좌구교이용 Midas/Civil 건모분석。연구결과표명,대우련속상량교,필수가강각과과중항만화중돈돈정처적항전험산;동시,해교적초시설계기-초20급하재불능만족“11”규범성-A 급차도하재변과과중최대만구적험산요구。
The vehicle load patterns have changed along with the updating of Chinese bridge design codes .To investigate the structural responses under the new Chinese code ,an existing continuous box girder bridge was analyzed based on a real engineering project .Different vehicle load patterns defined in 3 versions of Chinese bridge design codes were used in the analysis process ,which were CJJ11 - 93 ,CJJ77 - 98 ,and CJJ11 - 2011 .The FEM software MIDAS/Civil was adopted to establish the numerical model .The research result indicates that the bending resistance of mid-span and shear-ing resistance of center piers’ top are essential for continuous box girder bridges .The bending resistance under the initial vehicle load design of HS 20 cannot meet the requirements of maximum bending moment for urban class A roads defined in CJJ - 2011 .