Experimental Analyses of Mechanical Performance of CFST Column to Assembled Steel H-Beam Connections
The mechanical performance of a new proposed type of cross-shaped connection with concrete-filled steel tubular (CFST) column and assembled steel H-beam was investigated. Cyclic loading tests on the cross-shaped connections are carried out by using MTS servo loading system. Comparative analyses are conducted based on the experimental results including hysteretic curves, skeleton curves and stiffness degradation curves as well as ductility coefficients of cyclic loading tests. Furthermore, effects of geometric parameters of ring-stiffened plate, axial compression ratio and backing plate on the deformation performance of cross-shaped connections are analyzed. The results show that the increase of width of ring plate and the shape change of ring plate from square to circle can both significantly improve the ductility and the hysteretic characteristics of connection. It is emphasized that the specimen with square ring plates is of better deformation performance but lower bearing capacity than the ones with circular ring plates. Besides, the backing plates always have positive effects on the hysteretic characteristics, ductility and energy dissipation of the CFST column connections. Conversely, the increase of axial compression ratio contributes negatively to both the bearing capacity and deformation performance of the connection specimens. It can be concluded that the presented cross-shaped connection is of good deformation performance relating to hysteretic characteristics, energy dissipation and ductility, which can provide reference towards engineering practice with potential perspective application.
Behavior of Concrete-Filled Steel Tubular Three-Dimensional Subassemblages
Three-dimensional subassemblages consisting of a concrete-filled steel tubular column and four H-shaped beams were tested under a constant axial load on the column, constant beam loads in the minor direction, and alternately repeated beam shear in the major direction simulating the earthquake loading. The specimens were designed for two types of failure mode; shear failure of the beam-to-column connection panel, and flexural failure of the column. The paper presents the test results, and discusses the hysteretic behavior, the maximum strength, the energy dissipation capacity, and failure configuration of each specimen. It is concluded that the panel-failing specimens are more stable and exhibit more energy dissipation capacity compared with the column-failing specimens, the strength of the panel-failing specimen exceeds the calculated strength and reaches the strength corresponding to the column failure, although the connection panel yields in shear, and the specimen subjected to the bi-axial bending in the column becomes unstable due to excessive deformation of a doglegged shape in the minor direction.
Music and Ethical Responsibility
Introduction 1. Meaning and ethics in music 2. Experiencing music 3. Framing elements of musical experience 4. Improvisation and ethical responsibility 5. Musical improvisation as festival 6. Music, proximity, ethics 7. Ethical responsibility and other people's music Conclusion: ethical responsibility in musical experience.