Partially Steel-Fiber Reinforced Mortar
Flexural members that are reinforced by steel fibers for only a portion of their depth, referred to as being partially reinforced, can have strengths and ductilities equal to those of...

Experiments on Axially Loaded Concrete Shells
Described herein are tests of thirteen conical concrete shells under monotonically increasing axial load conditions. The load-deformation response, internal stresses and crack propagation...

Composite Beams under Cyclic Loading
Test specimens consisting of a steel column stub and composite steel-concrete beam are tested under cyclic loading. The results show that composite beams subjected to cyclic loading exhibit...

Impactive Effects of Tornado Missiles and Aircraft
Impacts by tornado-generated missiles and aircraft lead to both local and overall effects on barriers. The overall effects are evaluated in terms of the flexural and shear behavior of...

Equivalent Linear SDF Response to Earthquakes
The objective of this paper is to examine the accuracy of an equivalent linearization method for prediction of maximum response of a single degree-of-freedom bilinear hysteretic oscillator...

Reserve Margins of Structures for Impulsive Loads

Finite Element Models for Investigating R.C. Structures

Use of Inelastic Spectra in Aseismic Design
Modal analysis with inelastic response spectra is often used to design multistory frames subjected to earthquake motions. To evaluate the effectiveness of this approach, three different...

Asphalt-Crumb Rubber Waterproofing Membrane
This report is concerned with laboratory testing and field investigations of a water seepage barrier consisting of asphalt cement and reclaimed crumb-rubber tire peel. The test methods...

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 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...

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...

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...

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...

Ductile Behavior of Coupled Shear Walls
The behavior of two quarter full-size seven-story reinforced concrete coupled shear walls, with conventionally and diagonally reinforced coupling beams, subjected to static reversed cyclic...

Polymer-Impregnated Concrete: Laboratory Studies
It was shown that: (1) stress-strain behavior could be varied over a wide range, from ductile to brittle, by using combinations of a plasticizing or crosslinking comonomer with methyl...

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...

 

 

 

 

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