Statistical Stability Effects in Concrete Failure
Using a uniaxial localization model, it is shown that parallel elastic restraint increases ductility, while an increase in support flexibility or length of specimen reduces ductility....

Ductility Ratio for Slabs
A method is presented to calculate, approximately, the ultimate deflection of a reinforced concrete slab subjected to a point load at the center. This deflection is divided by the yield...

Summary of Panel Discussion on Buildings

Tests of Welded Steel Beam-to-Column Moment Connections
This paper reviews the results of three full-size symmetrically-loaded moment-resisting beam-to-column connections: (1) A fully-welded connection where the beam flanges and web are groove...

Tests on Slab-Column Connections with Shear and Unbalanced Flexure
Tests were conducted on eight 1/2-scale models of reinforced concrete interior flat plate-column connections transferring shear and unbalanced moment from gravity and simulated seismic...

Instability, Ductility, and Size Effect in Strain-Softening Concrete
Analysis of structural instability due to strain-softening (i.e., declining branch of the stress-strain diagram) is presented. In a continuum, strain-softening is impossible; it can exist...

California's Seismic Design Criteria for Bridges
An earthquake design criteria developed for bridges in California is presented. The criteria considers the proximity of maximum credible seismic events, local soil conditions, dynamic...

Earthquake Resistant Design of Intake-Outlet Towers
The problem of designing reinforced concrete intake-outlet towers, partially submerged in water, to withstand earthquake ground motion is examined in general terms. It is shown that water,...

Steel Ductility Measurements
Ductility is essential for the fabrication and adequate performance of cold-formed steel structures. For defining safe minimum values of ductility, it is first necessary to develop reliable...

Suggested Steel Ductility Requirements
Test evidence is presented on the performance under tension of perforated plates, bolted connections and formability of corners, supplemented by an elastic-plastic analysis of perforated...

Failure of Unidirectional Composites in Tension
Two approaches were used to predict the tensile strength of unidirectional fibrous composites. The first, based on a criterion of maximum tensile traction on the failure plane, was applied...

Connections in Thin Low-Ductility Steels
Bolted and fillet welded connections fabricated from flat sheets of thin low-ductility low carbon steels were tested as part of a research program investigating the influence of ductility...

Effects of Reinforcements on Ductility of Concrete
To study and compare the reinforcing action of stirrups, randomly distributed short fibers, and compression reinforcement in improving ductility of plain concrete, over-reinforced and...

Practical Selection of Material for Large Water Pipe
Practical considerations are compared in selecting materials for water pipe 30 in. and larger in size. Materials are steel, ductile-iron and reinforced concrete as covered by American...

Two Nonlinear Beams With Definitions of Ductility
Two different models of nonlinear beams which can be used to represent the girders and columns of a nonlinear multistory structure are described and compared. One beam model is limited...

Earthquake Design Criteria for Subways
Earthquake effects on underground structures comprise faulting and shaking. The design criterion for underground structures is ductility to absorb imposed distortions without losing capacity...

Earthquake Response of a Ramberg-Osgood Structure
Response of a single-degree-of-freedom Ramberg-Osgood type structure subjected to strong-motion earthquakes as well as to steady-state oscillations is studied. The Ramberg-Osgood system...

Nonlinear Earthquake Behavior of Tall Buildings
A digital-computer study was made on the response of typical high-rise buildings to strong earthquake motions. Frame components were assumed to have bilinear moment-curvature properties,...

Thermal Shock Effects on Brittle-Ductile Materials
Thermal shock has different effects on brittle and ductile materials. The main reason may be explained by strains and energy. A brittle material can endure little strain before rupture....

Limit Design by Successive Moment Distribution
The limit design method presented has the novel feature of combining the techniques of the plastic design theory; determining the moment capacities and the relative moments of inertia...

 

 

 

 

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