半刚性节点单层球面网壳抗震性能

Seismic analysis of single-layer spherical reticulated shells with semi-rigid joint

为了研究由多根螺栓现场拼装而成的半刚性节点单层球面网壳的抗震性能及其抗震设计方法,利用节点的弯矩-转角曲线对凯威特型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、地震波、节点弯曲刚度等参数的变化规律,通过大规模参数分析,给出半刚性节点单层球面网壳的地震内力系数取值,提出基于地震内力调整系数的半刚性节点单层球面网壳的实用抗震设计方法.

In order to study the seismic behavior and seismic design of single-layer reticulated shells with semi-rigid joint system which is connected by bolts, the seismic： capability of Kiewit reticulated shells with bolt-joint system was systematically analyzed based on the bend stiffness of bolt-joint system. The effects of different spans, high-to-span ratio, bend stiffness, roof load, types of bars and seismic wave on natural frequency and seismic internal force coefficient were analyzed for different large-scale shells. Then the internal force coefficient value of shells with semi-rigidity of joint system was summarized by a comprehensive numerical analysis. The design method of single-layer reticulated shells with semi - rigid joint system based on the revised seismic internal force coefficient was proposed.