Experimental study on seismic behavior of steel framed-tube structure with end-plate #br#
connected replaceable shear links made of low yield point steel
Zhang Hao1 Lian Ming1,2 Su Mingzhou1,2 Cheng Qianqian1
1. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Key Lab of Structural Engineering and
Earthquake Resistance of the Ministry of Education, Xi’an University of Architecture and Technology, Xi’an 710055, China
Abstract：To investigate the seismic behavior and replaceability of steel framed-tube structure with end-plate connected replaceable shear links made of low yield point steel(SFTS-RSLs), three singlebay and single-story two-thirds scale plane specimens of SFTS-RSLs with different link length and consideration of the composite action of concrete slab were designed. In the three test specimens, the columns and deep beams were made of Q460 high strength steel, and the shear links used low yield point LYP225 steel. The specimens were tested under low frequency cyclic loading to study the failure mode, lateral stiffness, carrying capacity, energy dissipation capacity, ductility, replaceability, inelastic rotation and overstrength factor of shear link. The test results indicate that the specimens have significant cyclic energy dissipation and inelastic deformation capacity due to the plump hysteretic loops and high ductility. All shear links of specimens mainly failed as buckling of link flange, fracture of the link flange-to-end plate weld, and tearing of the link web. The average overstrength factor of shear links reached approximately 1.95. The shear links had an inelastic rotation of exceeded 0.18 rad, much larger than 0.08 rad required by the AISC 341-16 provisions. The composite action of concrete slab had a limited effect on the load carrying capacity, energy dissipation capacity, ductility, replaceability, inelastic rotation and overstrength factor of shear links, and had an obvious effect on the lateral stiffness. Reduce the length of shear link could improve the load bearing capacity, lateral stiffness, inelastic rotation and overstrength factor of shear link,but reduce the energy dissipation capacity and ductility. The inelastic deformation and damage to the specimens was concentrated only within the shear links, while the columns and deep beams maintained elasticity under cyclic loading. This indicated that the SFTS-RSLs could be more prone to functional recovery after earthquakes.
张浩 连鸣 苏明周 程倩倩. 带可更换低屈服点耗能梁段-端板连接的#br#
钢框筒结构抗震性能试验研究[J]. 土木工程学报, 2020, 53(7): 28-42.
Zhang Hao Lian Ming Su Mingzhou Cheng Qianqian. Experimental study on seismic behavior of steel framed-tube structure with end-plate #br#
connected replaceable shear links made of low yield point steel. 土木工程学报, 2020, 53(7): 28-42.
