Study on the Seismic Performance of Slippable Joints of Existing Buildings and Elevators
The new slippable node can significantly improve the damping effect,and effectively improve the seismic performance of existing buildings with elevators.The new slippable node model proposed in this paper is to connect the elevator entry platform with the existing building by using high-strength bolts,circular orifice plates and rubber pads.The purpose is to dissipate energy through the friction between bolts and circular orifice plates and the cushion plate and rubber pad,resist seismic action and reduce structural deformation.In order to study the stress of this joint,the displacement loading test of 4 specimens is carried out in the paper.The main parameters of the test are whether there is a rubber pad in the base and the hole shape of the bolt.The experimental results show that the maximum energy dissipation of the traditional node is 0.62,and the maximum energy dissipation of the slippable node is 1.45.The shape of the bolt hole has a significant impact on the performance of the specimen.The addition of rubber pad increases the energy dissipation of the specimen,and the seismic resistance of the slippable node specimen is improved compared with the traditional node,giving full play to the energy dissipation capacity of the structure.The parametric analysis shows that the rubber pad and the shape of the hole obviously affect the deformation ability of the specimen.The hysteretic curve of the new slippable joints is relatively full,showing a certain"pinch"phenomenon.The whole structure has good seismic performance and energy dissipation capacity.The test results are in good agreement with the finite element analysis results.
installing elevatorsslippable nodeseismic performancefinite element analysis
国家科技期刊平台
NSTL
万方数据
维普
