Seismic Behaviour of Steel Staggered Truss in Building

In this study staggered-truss system (STS) is studied for structural steel framing for the multi-story and high-rise buildings. The staggered-truss systems (STS) consists of a series of story-high trusses spanning the total width between two rows of external columns and arranged in a staggered pattern on adjacent column lines. The system is known to be appropriate for use in residential buildings such as apartments, dormitory and hotels. The columns are located only on the external faces of the building. The large clear span and open areas can be created. The interaction of the floors, trusses, and columns makes the structure perform as a single unit, there by taking maximum advantage of the strength and rigidity of all the components simultaneously. Each component performs its particular function, totally dependent upon the others for its performance. These column free areas can be utilized for ballrooms, concourses and other large areas. The one added benefit of the staggered-truss framing system is that it is highly efficient for resistance to the lateral loading caused by wind and earthquake. The stiffness of the STS provides the desired drift control for wind and earthquake loadings. The staggered-truss framing system is one of the quickest available methods to use during winter construction. The floor system not only carries the direct vertical loads. In addition, It has to act as a diaphragm to transfer the horizontal shear forces between stories through truss diagonals. Because of this double use concept this system results in a lighter structure and provides more column-free space than a conventional beam-column framed structure.

Comparative Study of Staggered Truss System With and Without Shear Wall

A staggered Truss System (STS) is a prospective steel structure system for high-rise buildings and a steel staggered truss framing system is one of the effective design techniques to improve the efficiency in building construction. Besides, cost reductions arise from a reduction in steel tonnage. The purpose of this study is to carry out a comparative analysis of staggered truss systems with and without a shear wall for 8, 9, and 10-storey buildings using the ETAB software. In this analysis, time histories are used. For the analysis, these structures are modeled in ETABS software and various displacement data are achieved for different types of structures. After analysis of the models, some outcomes were observed and it was concluded that the staggered truss system with the shear wall has lower displacement values compare to the staggered truss system in the x and y-direction. In the y-direction, displacement was 64% to 85% less and in the x-direction, it was 3% to 62% less than the conventional staggered truss system. So, after analyzing the data it was concluded that a staggered truss system with the shear wall is more efficient than the staggered truss system.

Comparative Study of Different Structural Systems

Staggered Truss System (STS) is a prospective steel structure system for high-rise buildings and staggered truss framing system is one of the effective design techniques to improve the efficiency of building. In addition, cost reduction arise from reduction in steel tonnage using this framing method. The purpose of this study is to carryout comparative analysis of moment resisting system, moment resisting system with shear wall, staggered truss system and staggered truss system with shear wall. In this analysis, different time histories are used. For the analysis, these structures are modeled in SAP2000 v18 and various displacement data are achieved for different types of system. After analysis of these four models, some outcomes are observed and it is concluded that displacement in staggered truss system reduced by 28% to 76% in transverse direction compared to moment resisting system. It is observed that the reduction in displacement for STS with shear wall is 7% to 43% in longitudinal direction but in transverse direction, the reduction of displacement is almost same as STS system. As per result Staggered truss with shear wall gives 46% to 76% less displacement in longitudinal direction & 28% to 77% less displacement in transverse direction for different near fault ground motion. After analyzing all data, it seems that staggered truss system with shear wall is more efficient than moment resisting system and moment resisting system with shear wall and staggered truss system.

Dynamic Time History Analysis of the Effect of Infilled Walls on the Steel Staggered-Truss System

A structure with steel staggered-truss (SST) system is numerically investigated in this paper, utilizing the finite element 3D simulation analytial soft ware ETABS. Two different 3D models considering or ignoring the stiffness of infilled walls (SIW) are analyzed with Dynamic Time History method including storey drift and equivalent base shear force under frequent earth quake and rare earth quake. Results indicate that the effect of the SIW is prominent and should be considered.