By Jeffrey A. Gatscher
Earthquake safety of creating gear and structures offers a framework for using the newest earthquake engineering learn to the nonstructural components of person development initiatives, focusing on mechanical and electric structures. The seismic functionality of those platforms and their elements is necessary on the way to reduce harm and life-threatening dangers linked to seismic occasions whereas additionally keeping capital funding. And simply because the seismic engineering of constructions is moving from prescriptive-based criteria to performance-based techniques, an analogous is occurring for construction gear and structures. For practising engineers, a spot has opened among what's required and what's to be had to satisfy these necessities. during this publication, Gatscher, McGavin, and Caldwell bridge that hole. They prescribe a platforms engineering method of nonstructural layout and current numerous case reports to illustrate this process. they supply an in depth survey of alternative equipment for qualifying apparatus and structures, together with research, dynamic trying out, earthquake adventure facts, and comparative overview utilizing mixed equipment. additionally they deal with problems with implementation, together with qualification possession, part life-cycle, and verification instruments. This publication is a must have for any engineer designing or specifying nonstructural structures and their parts for a construction in a space with seismic dangers. it is going to even be a important reference for architects, development managers, and construction code officers.
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Extra resources for Earthquake Protection of Building Equipment and Their Systems: Bridging the Implementation Gap
S. Region State or Partial State Seismic Demand Building Ground Input Motion Buildingg Elements Floor (n+1) Height Factor - z/ h Structure Structural Transmissibility Nonstructural System Functional Interaction Seismic Demand Mechanical Elements Building Floor (n+1) Input Motion Anchorage Building Height Factors Structural Transmissibility Functional Interaction Seismic Demand Active Operation p Elements Device Demands Attachment Floor (n) Height Factor - z/ h Functional Device (n) Transmission Path From FRS Functional Device (n) / FRS Interaction Functional Device (n) Input Motion From FRS Functional Device (n) Functional Device (n+1) Transmission Path From FRS Functional Device (n+1) / FRS Interaction Functional Device (n+1) Input Motion From FRS Functional Device (n+1) Force Resisting Skeleton (FRS) Geographic Area Demand Structure Attachment Foundation Building Floor (n) Input Motion Anchorage Earthquake Demand Figure 1-17.
FRS assembly members can be joined together using mechanical fasteners or can be weldments. Monocoque construction techniques are also included as FRS types. The nonstructural FRS provides support for subassemblies, modules, and internal devices. The FRS also provides overall structural stability for the nonstructural platform. The FRS should be viewed as the nonstructural systems structural skeleton to resist all environmental and operating loads. 16 Nonstructural System Element Definition/Description Mechanical Subsystem Anchorage The final connection points securing the nonstructural FRS to the building structure, with or without the use of attachments.
This is a key concept. The interface relationships relevant to nonstructural protection and seismic qualification include the following: • Structural Transmissibility: Characterizes the seismic loading transmission path between system elements. The transmission path is quantified by using structural 14 Earthquake Protection of Building Equipment and Systems System Interfaces Geotechnical System System Elements (a) Geotechnical System Geotechnical Elements (b) Nonstructural System Building System Functional Interface Building System Buildingg Elements Functional Interface Nonstructural System Mechanical Elements Functional Interface Active Operation p Elements Local Soils Floor (n+1) Anchorage Earth Crust Structure Attachment Functional Device (1) Epicenter Floor (n) Force Resisting Skeleton (FRS) Functional Device (2) Focus Structure Attachment Functional Device (n) Foundation Anchorage Earthquake Demand Figure 1-13.