how to calculate stifness of floor

  • Calculate Building Stiffness - Seismology engineering - Eng-Tips

    i have a real building model (two story) and i do a free vibration test for the building (floors acceleration had been measured)then i get the.


  • Chapter 6 Building Response

    Density is important because it is used to calculate inertial momentum. The density of . Stiffness is the horizontal force distributed throughout a building divided by . strong floor slabs, and 2) sometimes they are connected at corners of rooms.


  • EXAMPLE CALCULATIONS 每 to the Requirements of BC3: 2013

    Figure 2: Example Building Basement Floor Plan . .. The lateral stiffness and mass distribution of the building structure should be symmetrical in plan with.


  • Vibration Design of Floors - STB RWTH Aachen

    27 Oct 2008 . A. Calculation of natural frequency and modal mass of floors and other .. are governed by stiffness, masses, damping and the excitation.


  • Structural engineering theory - Wikipedia

    Structural engineering depends upon a detailed knowledge of loads, physics and materials to . The stiffness of a structural element of a given material is the product of the material's . as the probability of maximum load being applied to all floors simultaneously is .. A simplified version of Euler-Bernoulli beam equation is:.


  • HORIZONTAL STIFFNESS OF WOOD DIAPHRAGMS

    18 Apr 2005 . Currently there is no method to calculate wood diaphragm stiffness that can .. wood-framed and plywood-sheathed floor diaphragms typical in.


  • a method to modelize the overall stiffness of a building in a stick .

    of each level of walls between two floors are calculated using the beam theory, making . In such cases, one of the frequently used methods to establish stiffness.


  • 12. vibration isolation - Penn State Mechanical Engineering

    28 May 2002 . 1) Characterize the system parameters (mass, stiffness, damping) by . Consider a vibrating machine, bolted to a rigid floor (Figure 2a).


  • Download (PDF)

    introductory concepts of mass, stiffness and frequency. Table of Contents ... Insert floor stiffeners, which are shown in color in Figure 11. Figure 11. Floor.


  • Real Modes of Vibration of Building Structures - Duke People

    Figure 1. A simplified model of a building frame with massive rigid floors and . Show that the mass matrix and stiffness matrix for this three-story building are:.


  • Modal Analysis of a 4 Story Shear Building - University of Maryland

    26 Jun 1996 . Figure 1 : Shear Building with Mass and Stiffness Matrices . by assuming that all of the building mass is lumped at the floor levels, that the floor.


  • A New and Practical Approach for Calculating the Static Eccentricity .

    3 Jul 2009 . eccentricity at each floor level in a doubly asymmetric, multi-storey . which the lateral stiffness matrices of all resisting frames are proportional.


  • Center of rigidity - ETABS - Computers and Structures, Inc .

    25 Jul 2014 . Answer: Center of rigidity is the stiffness centroid within a floor-diaphragm plan. When the center of rigidity is subjected to lateral loading, the floor . For a given floor diaphragm, center of rigidity is calculated through the.


  • Approximating lateral stiffness of stories in elastic frames by Schultz

    stiffness for calculation of lateral displacements in static analysis, and cal- culation of . equal rotations for exterior and interior joints in a floor of a frame and.


  • Floor vibrations - Steelconstruction.info

    This article describes the basic theory of floor vibrations, human perception and . assessment of floors with steel beams; 6.4 Floor response calculator . as only major changes to the mass, stiffness or damping of the floor system will produce.


  • Printing Story shear and story stiffness in STAAD pro - RAM | STAAD .

    19 Jan 2015 . Please advise how to get story stiffness and story shear from STAAD pro. . You will find a new tab called Floor Diaphragm using which the.


  • Rigid Diaphragm Analysis

    A rigid diaphragm analysis is necessary when a roof or floor diaphragm, defined as being rigid, is subjected to . to determine the maximum shear force transferred to each wall by the diaphragm. . Rigidity is another name for stiffness.


  • Computer modeling and effective stiffness of concrete wall buildings

    Figure 1. The effective initial stiffness should account for cracking of the concrete and other .. For the wall and floor slabs wall/slab elements are used, which are.


  • Designing Roof and Floor Diaphragms - AISC

    ed in Figure 1. Further, the diaphragm shear stiffness often is an order of magnitude lower than for a continuously connect- ed flat plate of similar dimen- sions.


  • Composite Steel Floor Deck - Slabs - Steel Deck Institute

    The Steel Deck Institute developed this Standard to determine the nominal resistance and composite stiffness of composite steel deck-slabs. This Standard is.