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.
出处
《土木工程学报》
EI
CSCD
北大核心
2010年第4期8-15,共8页
China Civil Engineering Journal
基金
国家自然科学基金面上项目(50778054)
"十一五"国家科技支撑计划(2006BAJ01B02)
关键词
半刚性节点
单层球面网壳
自振特性
地震内力系数
semi-rigid joint system
single-layer reticulated shell
natural frequency
seismic internal force coefficient
