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P Delta Analysis Check Excel sheet (Input data from ETABS) 3

P Delta Analysis Check Excel sheet (Input data from ETABS)

P-Delta effect, also known as geometric nonlinearity, involves the equilibrium and compatibility relationships of a structural system loaded about its deflected configuration. 1) P-D effect, or P-“small-delta”, is associated with local deformation relative to the element chord between end nodes. 2) P-D effect, or P-“big-delta”, is associated with displacements relative to member ends. Initial P-Delta

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What is P-delta , P-Delta effects and P-Delta analysis parameters 4

What is P-delta , P-Delta effects and P-Delta analysis parameters

P-Delta effect P-Delta effect, also known as geometric nonlinearity, involves the equilibrium and compatibility relationships of a structural system loaded about its deflected configuration. Of particular concern is the application of gravity load on laterally displaced multi-story building structures. This condition magnifies story drift and certain mechanical behaviors while reducing deformation capacity. P-Delta effect typically

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Center of Mass and Center of Rigidity 5

Center of Mass and Center of Rigidity

Center of Mass and Center of RigidityWhat is center of rigidity? Center of rigidity is the stiffness centroid within a floor-diaphragm plan.Center of Mass It is the average position of all the parts of the system, weighted according to their masses Check in CSI ETABS During analysis, ETABS automatically calculates this coordinate for each floor

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Structure Eccentricity check Spreadsheet 6

Structure Eccentricity check Spreadsheet

Check in CSI ETABSDuring analysis, ETABS automatically calculates this coordinate for each floor diaphragm. The diaphragm assignment must be present in the model. Center of rigidity and center of mass are then displayed by selecting Display –)) Show Tables –)) Analysis –)) Results –)) Structural Results –)) Centers of Mass and Rigidity –)) OK. During

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Stiffness Irregularity Check (Soft Story and Extreme Soft Story check) as per ASCE 7-16 7

Stiffness Irregularity Check (Soft Story and Extreme Soft Story check) as per ASCE 7-16

what is structural irregularity:During an earthquake, failure of structure starts at points of weakness. This weakness arises due to discontinuity in mass, stiffness and geometry of structure. The structures having the discontinuity are termed as irregular structures. Stiffness – Soft Story Irregularity: It is defined to exist where there is a story in which the

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Mass (Weight) Irregularity as per ASCE 7-16 Code 8

Mass (Weight) Irregularity as per ASCE 7-16 Code

What is structural irregularity: During an earthquake, failure of structure starts at points of weakness. This weakness arises due to discontinuity in mass, stiffness and geometry of structure. The structures having the discontinuity are termed as irregular structures. Weight (Mass) Irregularity: It is defined to exist where the effective mass of any story is more

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Story Displacement, Story Drift and Story Drift Ratio as per UBC and ASCE 7-16 9

Story Displacement, Story Drift and Story Drift Ratio as per UBC and ASCE 7-16

a) STORY DISPLACEMENT is the lateral displacement of floor or point from its origional position. b) STORY DRIFT is the lateral displacement of one level relative to the level below. c) STORY DRIFT RATIO is the story drift divided by the story height. Part 1 Part 2

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Torsion Irregularity check excel sheet/spreadsheet 10

Torsion Irregularity check excel sheet/spreadsheet

    TORSION IRREGULARITYa) Torsional Irregularity: Torsional irregularity is defined to exist where the maximum story drift, computed including accidental torsion with Ax =1.0, at one end of the structure transverse to an axis is more than 1.2 times the average of the story drifts at the two ends of the structure. Torsional irregularity requirements

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Septic tank design drawing + Excel Sheet + Theory Calculations 11

Septic tank design drawing + Excel Sheet + Theory Calculations

A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic treatment.[2] Settling and anaerobic processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as “primary treatment”).[2] Septic tank systems are a type of simple onsite sewage facility (OSSF). They

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