CAJ | 학술논문

针对悬索桥主缆索股线形对温度变化敏感的特点,研究了主缆索股断面温度变化以及索塔塔身温度变化对索股线形的影响.考虑主缆索股沿跨度为同一温度,并根据无应力索长恒定不变的原理,给出了空缆状态下索股温度变化与垂度关系的迭代方法,以及温度导致的索塔偏位与索股垂度之间的相互影响,及相应的修正方法.比较了迭代修正法和有限元法分别计算得到的不同温差下索股垂度的改变量,两种方法计算结果吻合较好,最大偏差为9 mm,约为3%.分析表明,运用迭代方法修正由于温差引起主缆索股垂度变化量是可行的.
침대현색교주람색고선형대온도변화민감적특점,연구료주람색고단면온도변화이급색탑탑신온도변화대색고선형적영향.고필주람색고연과도위동일온도,병근거무응력색장항정불변적원리,급출료공람상태하색고온도변화여수도관계적질대방법,이급온도도치적색탑편위여색고수도지간적상호영향,급상응적수정방법.비교료질대수정법화유한원법분별계산득도적불동온차하색고수도적개변량,량충방법계산결과문합교호,최대편차위9 mm,약위3%.분석표명,운용질대방법수정유우온차인기주람색고수도변화량시가행적.
In view of the at characteristic that the cable shape is very sensitive on the temperature in the process of main cable erection. Influence of the temperature changes on main cable section and bridge tower to the cable shape was researched. According to invariable temperature models of the cable, correction methods of temperature changes leading to sagging variation under the unloaded cable condition were proposed based on length of non-stress wire strand is equal, and computational method about temperature changes of bridge tower section to give rise to cable sag variable values was given. Sagging values with methods of iteration are in agreement with the results of finite element program SBCC in different temperature conditions, and the maximum deviation value is 9 mm and is about 3%. It shows that the correction methods on temperature changes leading to sagging variation are feasible to adjust suspended cable shape.