CAJ | 학술논문

采用有限元软件MIDAS/Civil建立军扬互通立交B，C匝道桥有限元计算模型，计算既有结构在不利荷载组合下的变形、内力和应力，依据B，C匝道桥4个支承传递最大支反力，采用有限元软件ALGOR建立新建框架墩实体有限元计算模型，对框架墩的变形和应力进行数值分析，参照理论分析结果对框架墩托换改造进行施工监控。分析计算结果表明，既有匝道桥支承截面顶板拉应力超限，但满足极限承载能力要求，裂缝宽度满足正常使用极限状态要求；预应力混凝土框架墩的横梁在最不利荷载组合下的变形较小，压应力储备充裕。施工监控实测数据表明，该框架墩在施工中的变形、应力稳定，实测值与理论值较吻合。
채용유한원연건MIDAS/Civil건립군양호통입교B，C잡도교유한원계산모형，계산기유결구재불리하재조합하적변형、내력화응력，의거B，C잡도교4개지승전체최대지반력，채용유한원연건ALGOR건립신건광가돈실체유한원계산모형，대광가돈적변형화응력진행수치분석，삼조이론분석결과대광가돈탁환개조진행시공감공。분석계산결과표명，기유잡도교지승절면정판랍응력초한，단만족겁한승재능력요구，렬봉관도만족정상사용겁한상태요구；예응력혼응토광가돈적횡량재최불리하재조합하적변형교소，압응력저비충유。시공감공실측수거표명，해광가돈재시공중적변형、응력은정，실측치여이론치교문합。
Building finite element model of Junyang interchange B and C ramp bridge, calculating existing structural displacement, internal force and stress under unfavorable load combination, according to the maximum reaction force from B and C ramp bridge, building new frame piers block model, frame piers’ displacement and stress are analyzed. According to the results of theoretical analysis, construction monitoring and control are carried out during reformation and replacement of frame piers. It is draw that existing ramp ’ s supporting section roof tensile stress has been over the limit through analysis, but it meets the requirements of the ultimate bearing capacity and its crack width meets the requirements of the normal limit states. PC frame piers cross girder’ s displacement is small and compressive stress reserve is enough. The construction control and monitoring measured data show that the displacement and stress of frame piers are stable in construction,which coincides with theory results.