Tag Archive for Tag: Strength

Tag: Strength Strength and stiffness from in situ tests

The content: 1.1 Standard penetration tests (SPT) 1.1.1 Modification of raw SPT values 1.1.1.1 Method A 1.1.1.2 Method B 1.1.2 Relative density 1.1.3 Undrained soil strength vs. SPT N 1.1.4 Friction angle vs. SPT N, Dr, and Ip 1.1.5 Parameters affecting strength 1.2 Cone penetration tests 1.2.1 Undrained shear strength 1.2.2 SPT blow counts using qc 1.3 Soil stiffness 1.4

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Tag: Strength Polymer-modified cement, mortar and concrete Mechanical properties

Stiffness It is generally considered (Ohama, 1998) that the addition of polymer will reduce the stiffness of the PMC and will do so in proportion to the amount of polymer added. There is, however, very little data available to confirm this, and it has been suggested (Bureau, 2001) that the reduction is really only noticeable  in the case of SBR modified mortars at

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Tag: Strength Strength Design for Flexure

Article 9.44 summarizes the basic assumptions for strength design of flexural members. The following formulas are derived from those assumptions. The area As of tension reinforcement in a reinforced-concrete flexural member can be expressed as the ratio where b = beam width and d = effective beam depth  distance from the extreme compression surface to centroid of tension reinforcement. At

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Tag: Strength Strength Design with Factored Loads

Safe, economical strength design of reinforced concrete structures requires that their ultimate-load-carrying capacity be predictable or known. The safe, or service-loadcarrying capacity can then be determined by dividing the ultimate-load-carrying capacity by a factor of safety. The ACI 318 Building Code provides for strength design of reinforced concrete members by use of factored loads (actual and specified loads multiplied by load factors). Factored axial forces,

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Tag: Strength Truss Member Details

The following shapes for truss members are typically considered: H sections, made with two side segments (composed of angles or plates) with solid web, perforated web, or web of stay plates and lacing. Modern bridges almost exclusively use H sections made of three plates welded together. Channel sections, made with two angle segments, with solid  , perforated web, or web of

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Tag: Strength Bending Strength

For a member subjected to flexure, the bending strength depends on the shape of the member, width/ thickness or depth/ thickness ratios of its elements, location and direction of loading, and the support given to the compression flange. Higher strengths are assigned to symmetrical and compact shapes. Flexural strength may be reduced, however, based on the spacing of lateral supports that prevent displacement

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