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- 저자 : Xian-tie Wang (검색결과 3 건)
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Xian-tie Wang,Chuan-Dong Xie 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.6
Steel plate shear wall (SPSW) systems have been used increasingly in medium- and high-rise buildings in recent decades. Two major issues in the slender-web SPSW are the buckling of H-section steel column base and signifi cant pinching in hysteretic curves. As a solution, SPSW using concrete-fi lled steel tubular (CFST) column and cross stiff eners was proposed in this paper. Cyclic tests of two specimens of 1/3 scaled steel beam-to-CFST column frame-thin SPSW with cross stiff eners or without stiff eners were conducted. Based on the verifi ed fi nite element method, parametric investigations considering the eff ect of the fl exural rigidity of CFST column, width-to-height aspect ratio, height-to-thickness ratio of infi ll steel plate and relative rigidity of cross stiff ener were carried out. Findings show that SPSW using CFST column exhibited favorable ductility behavior with no sudden loss of lateral bearing capacity. Adding stiff eners to SPSWs relieves the pinching eff ect of hysteretic curves and reduces the maximum lateral displacement substantially. With stiff eners, the average yield load and the peak load of SPSWs were approximately 15% and 9% higher than that of the unstiff ened specimens. Moreover, a fl exural rigidity of CFST column of at least 2.5 and a stiff ener rigidity of 30–50 were recommended to provide an economical and approving lateral bearing capacity.
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Seismic performance of the thin-walled square CFST columns with lining steel tubes
Xuanding Wang,Jie-Peng Liu,Xian-tie Wang,Guozhong Cheng,Yan Ding 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.44 No.3
This paper proposes an innovative thin-walled square concrete filled steel tubular (CFST) column with an octagonal/circular lining steel tube, in which the outer steel tube and the inner liner are fabricated independently of each other and connected by slot-weld or self-tapping screw connections. Twelve thin-walled square CFST columns were tested under quasi-static loading, considering the parameters of liner type, connection type between the square tube and liner, yield strength of steel tube, and the axial load ratio. The seismic performance of the thin-walled square CFST columns is effectively improved by the octagonal and circular liners, and all the liner-stiffened specimens showed an excellent ductile behavior with the ultimate draft ratios being much larger than 1/50 and the ductility coefficients being generally higher than 4.0. The energy dissipation abilities of the specimens with circular liners and self-tapping screw connections were superior to those with octagonal liner and slot-weld connections. Based on the test results, both the finite element (FE) and simplified theoretical models were established, considering the post-buckling strength of the thin-walled square steel tube and the confinement effect of the liners, and the proposed models well predicted the hysteretic behavior of the liner-stiffened specimens.
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Dynamic analysis method for the progressive collapse of long-span spatial grid structures
Li-Min Tian,Jian-peng Wei,Ji-Ping Hao,Xian-tie Wang 국제구조공학회 2017 Steel and Composite Structures, An International J Vol.23 No.4
In the past, the progressive collapse resulting from local failures during accidents has caused many tragedies and loss of life. Although long-span spatial grid structures are characterised by a high degree of static indeterminacy, the sudden failure of key members may lead to a catastrophic progressive collapse. For this reason, it is especially necessary to research the progressive collapse resistance capacity of long-span spatial grid structures. This paper presents an evaluation method of important members and a novel dynamic analysis method for simulating the progressive collapse of long-span spatial grid structures. Engineering cases were analysed to validate these proposed method. These proposed methods were eventually implemented in the progressive collapse analysis of the main stadium for the Universiade Sports Center. The roof of the structure was concluded to have good resistance against progressive collapse. The novel methods provide results close to practice and are especially suitable for the progressive collapse analysis of long-span spatial grid structures.
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