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| Experimental and numerical investigation of innovative movable connection |
| CHEN Ju1, JIN Wei-liang1, SHEN Xiao-hong2, TONG Jian-guo2, QIU Wen-qian2 |
(1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China；
2. Zhejiang Electric Power Design Institute, Hangzhou 310012, China) |
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Abstract An innovative movable connection for large scale sub-station frames was proposed for solving the deformation caused by temperature expansion. The movable connection was designed to release the temperature deformation in the longitudinal direction under the sustained loading from other two directions. The local and overall behaviour of the rolling bearing were investigated by loading tests. Results showed that the movable connection could move in the longitudinal direction under the load of other two directions. The lateral resistance was approximately 2.5% of the vertical load. Then the numerical model of Zhebei 1 MV large scale sub-station structures for thermal-load analysis was developed. Results show that thermal expansion deformation can be released with the application of the movable connection at the middle column-beam joint. The movable connection can be also applied in other steel structures.
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Published: 29 November 2009
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新型可动结点试验研究和数值分析
为解决特高等级大跨变电钢结构的温度变形问题,提出了一种新型的可动结点,该结点可以在长度方向自由滑动一定距离,以释放温度变形,同时又可以在另两个方向上承受荷载.通过平板和结点试验研究了该可动结点的局部性能和整体性能,结果表明，该结点在承受另两个方向的荷载下进行长度方向的移动,移动方向的侧向阻力仅为承受竖直荷载的2.5%左右.根据浙北1 MV特高压变电钢构架建立了温度-荷载耦合数值分析模型,分析了可动结点对于构架变形和承载力的影响.分析表明,对于大跨度连续构架,在中间柱的梁端设可动结点可以有效的解决温度应力问题,该结点也可以用于其他钢结构的温度应力问题.
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