| Staggered truss steel structure is a new type for steel residential system. For researching the application and design method of this system in multi-story residential building, the thesis first analyses the mechanical behavior of a seven-story staggered truss steel residential building using ETABS and SAP2000. The standard modal adopts Pratt truss and shear walls. The calculation of internal force includes gravity loads, wind loads and horizontal seismic loads. It also includes the seismic response and self-vibration characteristic of the structure.The second part of the thesis is to give several alternatives of standard modal and analyse the contributory factors of the behavior of staggered truss steel structure. The factors considered mainly include as follow:Different architecture depth, 12m, 16.5m, 18m staggered truss span are considered;Different form of frame column, concrete filled steel tubular and wide flange H profiled bar column are considered;Different form of floor slab, the influence of in-plane stiffness assumption is analyzed and some floor systems which can be used in practice are shown;Different longitude horizontal resistance system, shear wall, brace system and pure-frame resistance system are discussed;Different latitude horizontal resistance system, six truss forms and their mechanical capabilities are compared, and other latitude horizontal resistance components except truss such as shear wall and brace are analyzed;Different node form, the connection of web to truss chords and connection of truss chords to frame column are discussed. The third part of the thesis is to optimize the structure design according to the contributory factors analysis of the standard modal. The principal structure member and foundation are designed. It also shows the economical estimation of the structure.Finally, according to the research above, the thesis summarize the characteristic and outline of staggered truss steel building design and gives some advice to the future research.
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