Improved Finite Beam Element Method to Analyze the Natural Vibration of Steel-Concrete Composite Truss Beam

Abstract

Based on Hamilton's principle, this study has developed a continuous treatment for the steel-concrete composite truss beam (SCCTB). It has also deduced the SCCTB element stiffness matrix and mass matrix, which include the effects of interface slip, shear deformation, moment of inertia, and many other influencing factors. A finite beam element method (FBEM) program for SCCTB's natural vibration frequency has been developed and used to calculate the natural vibration frequencies of several SCCTBs with different spans and different degrees of shear connections. The FBEM's calculation results of several SCCTBs agree well with the results obtained from ANSYS. Based on the results of this study, the following conclusions can be drawn. For the SCCTB with high-order natural vibration frequency and with short span, the effect of the shear deformation is greater. Hence, the effect of the shear deformation on the SCCTB's high-order natural vibration frequency cannot be ignored. On the other hand, the effect of the interface slip on the SCCTB's high-order natural vibration frequency is insignificant. However, the effect of the interface slip on the SCCTB's low-order natural vibration frequency cannot be ignored.

Investigation on the Structural Behavior of Shear Walls with Steel Truss Coupling Beams under Seismic Loading

“…In recent decades, composite structures [13][14][15][16] develop quickly and have been investigated in researches [17][18][19][20][21][22][23] and used in various kinds of structures [24][25][26][27][28][29][30][31][32] and infrastructures [33][34][35][36][37][38][39][40][41][42]. e steel truss CB is a special kind of steel CB that satisfies flexible layout, clear loading path, and adaptable architectural features; however, investigations on steel truss CB shear wall structures are scarce.…”