单层柱面网壳几何参数对杆件地震动应力峰值的影响
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摘要
本文以跨度为15m的单层柱面网壳为研究对象,利用El—Centro地震波,通过对其长跨比、矢跨比的改变,分析了单层柱面网壳斜杆和纵杆地震动应力峰值的变化规律。结果表明,斜杆地震动应力峰值与纵杆地震动应力峰值相比较大;随长跨比增大,斜杆和纵杆地震动应力峰值增大,但当长跨比大于2.6时,略为减小;矢跨比变化对斜杆和纵杆地震动应力峰值变化的影响规律受长跨比选取的影响。
The 15m-span single-layered cylindrical grid shell is selected in the article,to analyze how the lengthspan ratio、rise-to-span ratio influence the peak of earthquake's dynamic stress of the single-layered cylindrical grid shell by using EL Centro.The results show that peak of earthquake's dynamic stress of oblique rod is more than that of vertical rod;The peak of earthquake's dynamic stress increases with increasing in length-span ratio,but there would be a slight reduction when length-span ratio is more than 2.6;Rise-to-span ratio influences the variation of the peak of earthquake's dynamic stress,which is related with the selection of length-span ratio.
The 15m-span single-layered cylindrical grid shell is selected in the article,to analyze how the lengthspan ratio、rise-to-span ratio influence the peak of earthquake's dynamic stress of the single-layered cylindrical grid shell by using EL Centro.The results show that peak of earthquake's dynamic stress of oblique rod is more than that of vertical rod;The peak of earthquake's dynamic stress increases with increasing in length-span ratio,but there would be a slight reduction when length-span ratio is more than 2.6;Rise-to-span ratio influences the variation of the peak of earthquake's dynamic stress,which is related with the selection of length-span ratio.
引文
[1]沈世钊,陈听.网壳结构稳定性[M].北京:科学出版社,1999 Shen Shizhao,Chen Ting.Research on stability of reticulated shell structure[J].Beijing:Science Press,2009(in Chinese)
[2]王志骞.钢结构设计[M].北京:科学出版杜,2009 Wang Zhiqian.Steel Structure Design[M].Beijing:Seience Press, 2009(in Chinese)
[3]王秀丽,高森,潘霞.四边支承单层柱面网壳减震体系性能分析[J].兰州理工大学学报,2007;33(2):120-124 Wang Xiuli,Gao Sen,Pan Xiang.Analysis of vibration performance of single-layered cylindrical lattice shells reducted-system supported at four sides[J].Journal of Lanzhou University of Technology,2007,33 (2):120 - 124(in Chinese)
[4]吴金妹.大跨度单层柱面网壳在强震下的失效研究[J].低温建筑技术,2009,6:74-75 Wu Jinmei.Failure mechanism of single-layer latticed cylindrical shells with big-span subjected to earthquake motions[J].Low Temperature Architecture Technology,2009,(6):74 - 75(in Chinese)
[5]支旭东,吴金妹,范峰,沈世钊.考虑材料损伤累积单层柱面网壳在强震下的失效研究[J].计算力学学报,2008,25(6):770- 775 Zhi Xudong,Wu Jinmei,Fan Feng,Shen Shizhao.Failure of single-layer reticulated cylindrical shells subjected to earthquakes[J].Chinese Journal of Computational Mechanics,2008,25(6):770- 775(in Chinese)
[2]王志骞.钢结构设计[M].北京:科学出版杜,2009 Wang Zhiqian.Steel Structure Design[M].Beijing:Seience Press, 2009(in Chinese)
[3]王秀丽,高森,潘霞.四边支承单层柱面网壳减震体系性能分析[J].兰州理工大学学报,2007;33(2):120-124 Wang Xiuli,Gao Sen,Pan Xiang.Analysis of vibration performance of single-layered cylindrical lattice shells reducted-system supported at four sides[J].Journal of Lanzhou University of Technology,2007,33 (2):120 - 124(in Chinese)
[4]吴金妹.大跨度单层柱面网壳在强震下的失效研究[J].低温建筑技术,2009,6:74-75 Wu Jinmei.Failure mechanism of single-layer latticed cylindrical shells with big-span subjected to earthquake motions[J].Low Temperature Architecture Technology,2009,(6):74 - 75(in Chinese)
[5]支旭东,吴金妹,范峰,沈世钊.考虑材料损伤累积单层柱面网壳在强震下的失效研究[J].计算力学学报,2008,25(6):770- 775 Zhi Xudong,Wu Jinmei,Fan Feng,Shen Shizhao.Failure of single-layer reticulated cylindrical shells subjected to earthquakes[J].Chinese Journal of Computational Mechanics,2008,25(6):770- 775(in Chinese)
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