objective questions for PSAD
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| show | Strain energy
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| it indicates the maximum amount of strain-energy the material can absorb just before it fractures (ability to absorb energy in plastic range) | show 🗑
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| show | Modulus of Resilience
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| refers to the property of a material which makes it return to its original dimension when the load is removed | show 🗑
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| refers to the ability of a material to deform in the plastic range without breaking | show 🗑
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| show | Stiffness
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| show | flexibility
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| material’s resistance to fracture | show 🗑
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| show | Hardness
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| show | Ductile Materials
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| Materials that exhibit little or no yielding before failure are referred to as _______ ________. | show 🗑
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| has the same physical and mechanical properties throughout its volume or material has the same composition at any point | show 🗑
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| show | Isotropic material
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| show | Orthotropic material
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| show | Prismatic
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| When a material has to support a load for a very long period of time, it may continue to deform until a sudden fracture occurs or its usefulness is impaired. This time dependent permanent deformation is known as _____. | show 🗑
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| When a material is subjected to repeated cycles of stress or strain, it causes its structure to break down, ultimately leading to fracture. This behavior is called _______. | show 🗑
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| lateral deflection that occurs when long slender members are subjected to an axial compressive force | show 🗑
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| A slight increase in stress above the elastic limit will result in a breakdown of the material and causes it to deform permanently. This behavior is called ________ and the deformation that occurs is called ______ __________. | show 🗑
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| show | Strain Hardening
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| show | Necking
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| It is the space between two adjacent floors | show 🗑
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| rigid horizontal planes used to transfer lateral forces to vertical resisting elements | show 🗑
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| wall designed to resist lateral forces acting in its own plane, typically wind and seismic loads | show 🗑
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| show | Shear wall
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| is the point where the object “suffers” no torque by the effect of the gravitational force acted upon it | show 🗑
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| center of resistance of a floor or diaphragm against lateral forces | show 🗑
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| It is the point through which the resultant of the resistance to the applied lateral force acts. | show 🗑
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| point through which the resultant of the masses of a system acts | show 🗑
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| show | Center of mass
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| The point through which the resultant of the restoring forces of a system acts | show 🗑
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| show | Eccentricity
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| show | Design seismic base shear
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| is the lateral displacement of one level relative to the level above or below | show 🗑
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| is the lateral displacement of the story relative to the base | show 🗑
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| show | Out-of-plane offsets
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| occurs when the structure’s center of mass does not coincide with its center of rigidity | show 🗑
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| show | Resonance
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| show | Natural period
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| rate at which natural vibration is absorbed | show 🗑
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| The effect of internal friction, imperfect elasticity of material, slipping, sliding, etc in reducing the amplitude of vibration | show 🗑
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| The geographical point on the surface of earth vertically above the focus of the earthquake | show 🗑
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| show | Focus
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| the focus is also called the | show 🗑
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| show | Ductility
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| show | Liquefaction
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| condition when soil tends to behave like a fluid mass | show 🗑
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| a measure of the strength of shaking during the earthquake | show 🗑
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| show | Magnitude
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| show | Seismographs
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| show | Soft Storey
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| show | Weak Storey
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