Experimental study on seismic mechanism of new prefabricated energy-dissipating node connected wooden frame
Traditional wooden-framed houses are prone to node failure and wall collapse during seismic activity,which can cause significant damage.This paper proposes a novel prefabricated energy-dissipating node connecting wooden frame,of which the working principle is that the node-consuming element is pressurized and yields and dissipates seismic energy during earthquake-proof design and rare earthquakes.In cases of extremely rare earthquakes,the energy-dissipating device transforms into a node brace to enhance timber frame lateral resistance.On the basis of the design method of energy-dissipating device,the working performance of energy-dissipating device and the seismic working mechanism of wooden frame were studied through energy-dissipating element test and energy-dissipating node wooden frame quasi-static test.The study shows that the energy-dissipating element made of thin steel sheet has good working performance,the energy-dissipating device shows good energy-dissipating capacity in the lateral deformation of the wooden frame,the node diagonal brace is formed after the failure of the energy-dissipating element,the wooden frame structure yields when the inter-storey displacement angle θ=1/25,and the root of the wooden column breaks and fails when the inter-storey displacement angle reaches 1/8.The use of energy-dissipating node wooden frame as a secondary defense line can achieve different seismic mechanisms for various seismic levels,and effectively improve the anti-collapse ability of the house when used in civil,brick and other structural houses.
energy dissipating devicehysteretic curvetimber frameshock absorption
NETL
NSTL
万方数据
维普
