TAILIEUCHUNG - APA Engineered Wodd Handbooks Episode 9

Tham khảo tài liệu 'apa engineered wodd handbooks episode 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CHAPTER 7__ DESIGNING FOR LATERAL LOADS Thomas D. Skaggs . PE. Senior Engineer Zeno A. Martin . Associate Engineer INTRODUCTION This chapter addresses the design of wood-framed structural-use panel-sheathed diaphragms and shear walls which also may be referred to as vertical diaphragms. The supplement does not cover the method in which lateral loads are determined nor cover prescriptive requirements for nonengineered wall and roof construction as these topics are addressed in complete detail by the applicable model building codes. TERMINOLOGY Average story drift is the average of the deformations of all lines of shear walls oriented parallel to the applied load. The deformation shall be calculated as a portion in each line of shear walls at the top of the shear wall see Eq. . Base shear the total reaction at the base of a wall parallel to the axis of the wall or structure due to an applied lateral load a sliding force. Blocked diaphragm a diaphragm in which all panel edges occur over and are fastened to common framing the additional fastening provides a load path to transfer shear at all panel edges thus increasing the overall shear capacity and rigidity stiffness of the diaphragm. Boundary element diaphragm and shear wall boundary members to which sheathing transfers forces. Boundary elements include chords and drag struts at diaphragm and shear wall perimeters interior openings discontinuities and reentrant corners. CHAPTER SEVEN Box-type structure when diaphragms and shear walls are used as the lateral force resisting system of a building the structural system is called a box system. Chord the edge members of a diaphragm or a shear wall typically the joists ledgers truss elements double top plates end posts etc. that resist axial forces. Chords are oriented perpendicular to the applied lateral load. Collector a structural building component that distributes the diaphragm shear from one building element to another typically .

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