半刚性节点单层球面网壳结构的抗震性能及其设计方法
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摘要
由单根或多根螺栓现场拼装而成的半刚性节点单层球面网壳逐渐受到工程设计人员及一些学者的关注。这种节点具有一定的弯曲刚度和扭转刚度,是介于刚接和铰接节点之间的一种半刚性节点。利用文献中的弯矩-转角曲线对凯威特型半刚性螺栓球节点单层球面网壳的抗震性能进行了较为系统的分析,包括其自振特性及杆件地震内力系数随矢跨比、跨度、屋面质量、杆件截面、地震动、节点弯曲刚度等参数的变化规律;通过大规模参数分析,采用基于包络响应的地震内力系数统计方法,给出凯威特型半刚性节点单层球面网壳考虑杆件弯矩影响的地震内力系数取值;提出基于地震内力调整系数的凯威特型半刚性节点单层球面网壳的实用抗震设计方法,可为工程设计提供参考。
Single-layer reticulated shells with semi-rigid joints connected by bolts have been in the attention of both designers and researchers alike. The bending stiffness and rotation stiffness of the semi-rigid joint system are between those of the rigid-joint and pin-joint systems. The seismic capability of Kiewitt reticulated shells with bolt-joint system is analyzed using the bending stiffness of the bolt-joints in the literature. The regular patterns of natural frequency and seismic internal force coefficient are obtained through analysis of large-scale shells with different parameters, including span, high-to-span ratio, bending stiffness, roof load, member section size and seismic wave. The internal force coefficient values (consider the influence of moment) of shells with semi-rigid joint system are summarized by using statistics method for enveloping the maximum response.
Single-layer reticulated shells with semi-rigid joints connected by bolts have been in the attention of both designers and researchers alike. The bending stiffness and rotation stiffness of the semi-rigid joint system are between those of the rigid-joint and pin-joint systems. The seismic capability of Kiewitt reticulated shells with bolt-joint system is analyzed using the bending stiffness of the bolt-joints in the literature. The regular patterns of natural frequency and seismic internal force coefficient are obtained through analysis of large-scale shells with different parameters, including span, high-to-span ratio, bending stiffness, roof load, member section size and seismic wave. The internal force coefficient values (consider the influence of moment) of shells with semi-rigid joint system are summarized by using statistics method for enveloping the maximum response.
引文
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[2]张竟乐,赵金城,许洪明.单层网壳板式节点的刚度分析[J].工业建筑,2005,35(4):88-90(Zhang Jingyue,Zhao Jincheng,Xu Hongming.Analysis of stiffness of gusset-type joints for single-layer reticulated shells[J].Industrial Construction,2005,35(4):88-90(in Chinese))
[3]郭小农,沈祖炎.半刚性节点单层球面网壳整体稳定性分析[J].四川建筑科学研究,2004,30(3):10-12(Guo Xiaonong,Shen Zuyan.Analysis of stability of single-layer spherical reticulated shells with semi-rigid joints[J].Sichuan Building Science,2004,30(3):10-12(in Chinese))
[4]徐箐,杨松森,容健.节点刚度对凯威特型单层球面网壳内力的影响[J].钢结构,2005,20(4):15-17(Xu Jing,Yang Songsen.Influence exerted on the internal forces of kiewitt single-layered spherical shells by the stiffness of joints[J].Steel Construction,2005,20(4):15-17(in Chinese))
[5]苏玉红.节点刚度对网壳结构稳定影响的研究[D].南京:东南大学,2005(Su Yuhong.Research on the effect of joints stiffness on the stability of reticulated shells[D].NanJing:Southeast University,2005(in Chinese))
[6]马会环.半刚性节点单层球面网壳稳定性及其节点性能研究[D].哈尔滨:哈尔滨工业大学,2007(Ma Huihuan.Stability analysis of semi-rigidity single layer spherical reticulated shells and its joint system[D].Haerbin:Harbin Institute of Technology,2007(in Chinese))
[7]崔美艳.半刚性节点单层球面网壳稳定性分析[D].哈尔滨:哈尔滨工业大学,2006(Cui Meiyan.Stabilityanalysis of single layer spherical reticulated shells with semi-rigidity of joint system[D].Harbin:Harbin Institute of Technology,2006(in Chinese))
[8]Loureiro E P S A.One step method for buckling analysis of single layer lattice structure with semi-rigid connections[D].Spain:Unversity of A Coruna,2002
[9]范峰,钱宏亮,邢佶慧,等.强震作用下球面网壳动力强度破坏研究[J].哈尔滨工业大学学报,2004,36(6):722-725(Fan Feng,Qian Hongliang,Xing Jihui,et al.Dynamic strength fracture of reticular shells under severe earthquakes[J].Journal of Harbin Institute of Technology,2004,36(6):722-725(in Chinese))
[10]Fan F,Shen S Z.Study on the dynamic strength failure of reticulated domes under severe earthquakes[C]//International Association for Shell and Spatial Structures Symposium.Montpellier,France:2004
[11]沈世钊,陈昕.网壳结构稳定性[M].北京:科学出版社,1999(Shen Shizhao,Chen Xin.Stability of spherical shell structure[M].Beijing:Science Press,1999
[12]邢佶慧.网壳结构抗震性能研究[D].哈尔滨:哈尔滨工业大学,2004(Xing Jihui.Research on the anti-seismic behavior of space frames[D].Harbin:Harbin Institute of Technology,2004(in Chinese))
[13]Ueki T,Mukaiyama Y,Kubodera I,et al.Study on the elastic elasto-plastic buckling behaviour of single layered domes composed of members having axial and bending springs at both ends[C]//Proceedings of the IASS Symposium.Copenhagen:1991
[14]于晓野,范峰,沈世钊.单层球面网壳的抗震性能分析[J].西安建筑科技大学学报:自然科学版,2006,38(4):445-449(Yu Xiaoye,Fan Feng,Shen Shizhao.Study on the aseismic performance of single-layer reticulated domes[J].Journal of Xi′an University of Architecture&Technology:Natural Science Edition,2006,38(4):445-449(in Chinese))
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