CAJ | 학술논문

由预制平行高强钢丝索股组成的主缆，不仅可以通过其自身弹性变形，而且可以通过其几何形状的改变来影响体系平衡，表现出大位移非线性力学特征。为了获得大跨度悬索桥成桥主缆的真实线形及其内力分布，基于有限单元法，从主缆的几何形状出发，推导了与主缆形状一致的位移场，然后通过对节点水平方向和竖直方向平衡方程解藕，推导出主缆线形与结构系统参数的关系，在此基础上，进一步推导了主缆内力与结构系统参数的关系。将计算理论编译成MATLAB程序，并应用于某大跨度悬索桥成桥主缆线形及其内力识别，主缆计算线形与实测结果吻合良好。采用本文方法计算的主缆内力分布与通用有限元相应的计算值比较相近，从而验证了本文方法能够较准确地识别出成桥主缆的线形及其内力分布，另外具有易编程实现的优点。
유예제평행고강강사색고조성적주람，불부가이통과기자신탄성변형，이차가이통과기궤하형상적개변래영향체계평형，표현출대위이비선성역학특정。위료획득대과도현색교성교주람적진실선형급기내력분포，기우유한단원법，종주람적궤하형상출발，추도료여주람형상일치적위이장，연후통과대절점수평방향화수직방향평형방정해우，추도출주람선형여결구계통삼수적관계，재차기출상，진일보추도료주람내력여결구계통삼수적관계。장계산이론편역성MATLAB정서，병응용우모대과도현색교성교주람선형급기내력식별，주람계산선형여실측결과문합량호。채용본문방법계산적주람내력분포여통용유한원상응적계산치비교상근，종이험증료본문방법능구교준학지식별출성교주람적선형급기내력분포，령외구유역편정실현적우점。
The flexible main cable is made of high strength steel wire prefabricated parallel cable shares.Its large displacement and nonlinear mechanical properties are shown by their own elastic deformation and its geome-try changes affecting the system balance.To get the real main cable alignment and cable force distribution of long-span suspension bridge,based on the finite element method,the element stiffness matrix was deduced, whose displacement field was as same to the element alignment.In the proposed method,the horizontal and ver-tical direction equilibrium equations were uncoupled,and then the relationship between main cable alignment and the system parameters was obtained.The proposed method was compiled to MATLAB programs,and applied to one long-span suspension bridge.The calculated cable alignment by the proposed method and the measured value were in good agreement,and the cable force was close to the corresponding ANSYS value.So,the compar-ison results verify feasibility of the proposed method,which could provide useful method for long-term monitoring of long-span suspension bridges.