It is well recognized that structures designed by current codes undergo large inelastic deformations during major earthquakes. Solution: b = 20 deg. Lateral shaking is the force that can cause the most damage to a building during an earthquake. Instructional Material Complementing FEMA 451, Design Examples Seismic Load Analysis 9 - 5 earthquake ground motion and is equal to the addition of 0.50 Ca I D to the dead load effects D Ωo = seismic force amplification factor as given in Table (A-4), and accounts for structural over-strength r = redundancy factor, to increase the effects of earthquake loads on structures with few lateral force resisting elements, given by rmax Ag 6.10 Ground Motion Lateral Force Earthquake Engineer Building Code Fundamental Period These keywords were added by machine and not by the authors. Using coulomb's lateral earth pressure theory. Lateral Force Demand of Essential Equipments in Hospital Buildings for Earthquakes . By continuing to use our website, you are agreeing to our privacy policy. Lateral deflection is the predicted movement of a structure under lateral loads. NYC Building Code 2008 > 16 Structural Design > 1617 Earthquake Loads — Minimum Designlateral Force and Related Effects > 1617.4 Equivalent Lateral Force Procedure for Seismic Design of Buildings 1618.1 Structural Design, Dynamic Analysis Procedures Determine total force, Pa, at heel per foot width of wall. This course will cover the development of the equivalent seismic force based on IBC 2012 and ASCE 7-10 using ASCE 7-10 Section 12.8. Equivalent Lateral Force vs Response Spectrum Analysis Published on November 5, 2018 November 5, 2018 • 100 Likes • 12 Comments 1.4 Earthquake Demand versus Earthquake Capacity 10 1.5 Force-based Design to Displacement-based Design 13 2 Earthquake Demand on Buildings ... H Lateral base shear force of the building Hmax Peak lateral strength I Importance factor Ib,eff Effective moment of inertia of beam Moment Resisting Frame = Diagonal Shear Cracks lateral force can be redistributed to secondary elements or system to prevent progressive failure (alternate load path) Hyperstaticity of the structure causes the formation of plastic hinges that can absorb considerable energy without depriving the structure of its stability. The development of seismic forces using the Equivalent Lateral Force Procedure equation V=Cs * W will be explained through the terms of Newton's 2nd Law. The Lateral Force Resisting System (LFRS) is Comprised of Horizontal and Vertical Elements Horizontal Element (Diaphragm) Lateral wind or earthquake load Vertical Element Common vertical elements are shown on the following slides. susceptible to liquefaction and lateral spreading during earthquakes. 6. For the seismic weight calculations, use the dead load and 25% of the live load. The 1923 Great Kantō earthquake (Japan) and earlier events inspired Japanese engineer Toshikata Sano to develop a lateral force procedure that was officially implemented in the 1924 Japanese Urban Building Law, which directed engineers to design buildings for horizontal forces of about 10% of the weight of the building. load combinations to solve for the variety of structural solutions. In general, this analysis performed statically and dynamically. This spreadsheet will find your seismic coefficient for structural building (Chapter 12) and non-building (Chapter 15) systems. Active earth pressure coefficient: K a =0.54. 1. Static force procedures of most building codes require that the lateral earthquake force at each floor level of an asymmetric-plan building be applied eccentrically from the centers of rigidity. 1 and in standard occupancy structures in seismic zone no. The concept employed in equivalent static lateral force procedures is to place static loads on a structure with magnitudes and direction that closely approximate the effects of dynamic loading caused by earthquakes. It is different from longitudinal force in such a way that in case of lateral force, the direction of the force is parallel to the plane of reference of structure and perpendicular to the axis of rotation of the structure. Lateral-force-resisting elements must be provided in every structure to brace it against wind and seismic forces. Assumptions – EQRD Clause: 6.2 Calculating and designing Lateral Force Resistance Systems (LFRS) for Wind and Earthquake Forces in Light Frame Construction 1 General The objectives in this course and in designing a building’s lateral resistance to wind and earthquake forces are • to provide a system of shear walls, diaphragms, and interconnections to transfer A Seismic Design Lateral Force Distribution Based on Inelastic State of Structures Shih-Ho Chao,a) M.EERI, Subhash C. Goel,b) M.EERI, and Soon-Sik Leec) It is well recognized that structures designed by current codes undergo large inelastic deformations during major earthquakes. Start studying ARE SS 14- Lateral Forces, Earthquakes. represent material behavior during earthquake. Determine the earthquake force on each story in North-South direction. Earthquake Load Calculation (base shear method) The 3-story standard office building is located in Los Angeles situated on stiff soil. Unit 6: Step by step procedure for seismic analysis of RC buildings (Maximum of four storey), Solution for For earthquake loads, ground shaking causes inertial forces in the a. Lateral force-resisting system b. Beams c. Diaphragm d. Foundation e. Columns… However, lateral force distributions given in the seismic design codes are typically based on results of elastic-response studies. Applicability: The static lateral force procedure may be used for the following structures: All structures, regular or irregular (Table1.a and 1.b), in seismic zone no. 12.Determine lateral force analysis procedure 13.Compute lateral loads 14.Add torsional loads, as applicable 15.Add orthogonal loads, as applicable 16.Perform analysis 17.Combine results 18.Check strength, deflection, stability. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Determine total passive force, Pp at toe per foot width of wall. A series of large-scale dynamic centrifuge model tests were performed to study the behavior of single piles and pile groups in a soil profile comprised of a nonliquefied crust spreading laterally over a loose saturated sand layer. The structure of the building is steel special moment frame. Use the Equivalent Lateral Force method from ASCE 7-16 to determine the vertical distribution of horizontal earthquake loads that the SFRS (not shown) should be designed to resist for the ground motion direction shown. Earthquake resistant design of structures (Subject Code: 06CV834) UNIT 5 & Unit 6: Seismic lateral force analysis Contents: Unit 5: Determination design lateral loads, Seismic design philosophy, Equivalent lateral procedure and Dynamic analysis procedure. Cite . Equivalent Static Lateral Forces. BibTex; Full citation Abstract. 2.Earthquake does not occur simultaneously with maximum wind, flood or sea wave. However, lateral force UBC97 Earthquake Lateral Forces Download https://goo.gl/kcY This site uses cookies. 14 LATERAL FORCES— EARTHQUAKES Nomenclature C a numericalcoefficientusedin Equation14.2,givenin UBCTable16-Q C v numericalcoefficientusedin Equation14.1,givenin UBCTable16-R C t numericalcoefficientforcalcu- latingtheperiodofvibration F p … 100 ... attached in a series of reference buildings to examine the structural demand of hospital equipments during an earthquake. All moment-resisting frames are located at the perimeter of the building. In this paper, a reactor building is considered for earthquake lateral force analysis to determine the design base shear force. HORIZONTAL LATERAL FORCE BUILDINGS ( CLAUSE 7.5.1) Buildings and portions there of shall be designed and constructed, to resist at SEISMIC ZONE P% least the effects of design lateral force || 0.7 specified in 7.5.1. It is well recognized that structures designed by current codes undergo large inelastic deformations during major earthquakes. The Static Lateral Force Procedure. 1.Resonance will not occur during earthquake as the force is random & impulsive, not steady state. It only finds your base shear forces, you will still need to plug any seismic shear forces into either your ASD ? EARTHQUAKE LOADS (BNBC) - View presentation slides online. Redundancy 3.Static properties (modulii, strength etc.) By Chao-hsun Huang. Learn vocabulary, terms, and more with flashcards, games, and other study tools. This process is experimental and the keywords may be updated as the learning algorithm improves. Lateral Force The force that acts in the direction parallel to ground and perpendicular to the direction of gravitational pull of earth is known as lateral forces. 2. The three principal types of resisting elements are shear walls, braced frames, and moment- resisting frames. 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