CAJ | 학술논문

　　预应力结构中出现裂缝一直困扰着桥梁工程技术人员。本文引用某工程实例中出现的裂缝病害，利用MIDAS空间三维杆系单元，分析该桥在施工工况和使用工况作用下的受力情况，并分析对比该桥塔下双支座之一的约束方向摆放错误对整体结构和细部构件造成的影响。本文得出的结论是，设计时的不足和施工中的错误综合造成了该桥严重病害的局面。本文的分析结果为该项目的后续改造提供了依据，本文的裂缝分析方法也为今后相关项目的病害预防和成因分析提供了参考。
　　예응력결구중출현렬봉일직곤우착교량공정기술인원。본문인용모공정실례중출현적렬봉병해，이용MIDAS공간삼유간계단원，분석해교재시공공황화사용공황작용하적수력정황，병분석대비해교탑하쌍지좌지일적약속방향파방착오대정체결구화세부구건조성적영향。본문득출적결론시，설계시적불족화시공중적착오종합조성료해교엄중병해적국면。본문적분석결과위해항목적후속개조제공료의거，본문적렬봉분석방법야위금후상관항목적병해예방화성인분석제공료삼고。
The cracks in prestressed structures have been pla-guing bridge engineering and technical personnel. In this art-icle, the author refers to the cracks in a practical project, uses the three-dimensional space truss MIDAS unit to analysis the stress distribution under the action of construction state and working conditions, and analysis and comparison of the bridge tower, one double seat restraint error display direction of the impact on the overal and detail structure. This conclusion is that the lack of the design and the error of construction cause the serious disease situation of the bridge. This article analyzes the results of the project and provides the basis for subsequent transformation. Meanwhile, the cracks methods provide refe-rence for future disease prevention and causes analysis of rela-ted projects.