棋盘形四角锥网架屋盖动力分析  

Dynamic analysis of the chessboard-shaped pyramid space grid

作　　者：朱恩静[1] 张亚鹏[1] 李伍恩 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]河北荣盛集团,河北廊坊065000

出　　处：《河北工程大学学报（自然科学版）》2010年第1期12-15,共4页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：利用有限元软件SAP2000对64—96m的5种不同跨度的棋盘形四角锥网架建模，进行模态分析和力学性能分析，得出了大跨度棋盘形四角锥网架的自振周期与网架的跨度及荷载等级有关。并且得出了在静荷载与竖向地震组合作用下内力分布规律，上弦内力由四周拉力向中部压力过渡；下弦内力最大值发生在1／4平面的中部；腹杆内力在四周锥体内较大，为设计和施工提供参考。By use of SAP2000, five kinds of chessboard - shaped pyramid space grid which span in 64- 96 meters were made as examples for modeling, which were compared with the mechanical properties. The results show that the natural vibration period is related to span and load rating of the space grid. The internal force distribution regulation under the combination of static load and vertical earthquake were also decrypted that the tension of upper chord was transited to the central pressure from surrounding; the maximum internal force of bottom chord occurred in the one force plane central; and the maximum internal forces of belly bars occurred in the surrounding pyramids, which was available for design and engineering project.

关 键 词：棋盘形四角锥网架 模态分析 时程分析 SAP2000 

分 类 号：TU394[建筑科学—结构工程]