Entity

Time filter

Source Type


Sun G.-H.,Beijing University of Technology | Sun G.-H.,Suzhou University of Science and Technology | Gu Q.,Beijing University of Technology | Gu Q.,Suzhou University of Science and Technology | And 4 more authors.
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2010

Based on an experimental study of one-bay, two-story partially-restrained steel frame with RC infill walls and flushed end-plate connections (PSRCW) at one-third scale under cyclic lateral loading, the failure pattern and damage process were introduced, and hysteretic behavior, stiffness degradation, deformation and ductility, energy dissipation and rotation capacity of connections were analyzed. The results show that the specimen has large lateral strength and stiffness, moderate ductility and deformation capacity. During the test, the lateral stiffness deteriorates unanimously and slowly. When shear connectors along the interface of beam failed by fracture, the infill walls transfer lateral shear force through main diagonal compress strut. After reaching the maximum load, the lateral load carrying capacity dropped quickly, but PSRCW structure still possessed enough residual lateral strength and served as the second anti-seismic line of defense. The flushed end-plate connection has certain rotation capacity, and the failure mode of connections due to the existence of tension can be avoided. Source


Sun G.-H.,Beijing University of Technology | Sun G.-H.,Suzhou University of Science and Technology | Gu Q.,Suzhou University of Science and Technology | He R.-Q.,Beijing University of Technology | And 3 more authors.
Gongcheng Lixue/Engineering Mechanics | Year: 2012

A simple inclined strip model for analyzing the hysteretic behavior of partially-restrained steel frame with reinforced concrete walls (PSRCW) is presented. The axial force vs displacement of inclined strip is derived according to the constitutive relationship of concrete, and the hysteretic rules of inclined strips is determined through multi-linear plastic pivot of non-linear link element. The main parameters of PSRCW are analyzed, including mechanical model, quantity and inclined angles of strips. The results demonstrate that multi-linear plastic pivot can be used to simulate the hysteretic behavior of inclined strip, and more than seven strips and an inclined strip angle of 40-50 degree are suggested. The comparison between the results of calculation and those of corresponding tests shows good agreement. Source


Sun G.-H.,Beijing University of Technology | Sun G.-H.,Suzhou University of Science and Technology | Gu Q.,Suzhou University of Science and Technology | He R.-Q.,Beijing University of Technology | And 3 more authors.
Beijing Gongye Daxue Xuebao/Journal of Beijing University of Technology | Year: 2011

Based on the experimental investigation of three one-bay, two-story partially-restrained steel frame with reinforced concrete infill walls (PSRCW) at 1/3 scale under low reversed cyclic loading, the hysteretic behavior, deformation character, and failure mode of different type of shear connectors in PSRCW are analyzed. The results show that hysteretic curves of shear connectors display an invert "S" shape, and exhibit obvious slipping character. The failure modes of three types of shear connectors are concrete crush on the basis of shear connectors. Channel shear connector possesses the highest shear stiffness, and the smallest interface slip. Headed stud has the lowest shear stiffness, and U shape deformed steel bar has moderate shear stiffness. The shear connectors in PSRCW sustained combined shear and tension, especially lied in the corner region of infill walls. According to mechanism character of shear connector in PSRCW, rational design method is proposed. Source


Sun G.-H.,Beijing University of Technology | Sun G.-H.,Suzhou University of Science and Technology | He R.-Q.,Beijing University of Technology | He R.-Q.,Suzhou University of Science and Technology | And 3 more authors.
Gongcheng Lixue/Engineering Mechanics | Year: 2010

The purpose of this study was to experimentally investigate the behavior of a partially-restrained steel frame with RC walls with top-and seat-angle with double web-angle connections (PSRCW) under cyclic lateral loads. A total of six 1/3 scaled one bay, and two story test specimens were built and tested. The hysteretic behavior, stiffness degradation, plastic deformation capacity, ductility and energy dissipation capacity, force transmission and failure modes were analyzed in detail. The results indicate that PSRCW shows large stiffness and lateral strength, while it shows moderate energy dissipation capacity. At the design load level, the shear connected with steel beam resist about 80% of the total lateral load, and steel frame resists approximately 70% of the overturning moment. Shear connectors subjected to combined cyclic shear and tension forces would induce low cyclic fatigue; the performance improvement of shear connectors would increase the ductility of PSRCW. Source

Discover hidden collaborations