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Not Your Father's Concrete
A simple mixture of water, aggregate and cement, conventional concrete is environmentally-friendly by nature. But with landfills bloating and hazardous wastes becoming increasingly difficult...

San Francisco CSO
Today, even a light rain can overload San Francisco's combined sewer overflow (CSO) system, sending untreated sewage and stormwater into the bay and ocean. This is especially...

Shotcrete for Underground Support VII
This proceedings consists of papers presented at the Shotcrete for Underground Support VII Conference held in Telfs, Austria, June 11-15, 1995. It covers three broad themes concerning...

New Construction Materials Proliferate in Japan
Research and development of new construction materials is extensive in Japan, and many new materials are being used in Japan now. The author analyzes the research environment in Japan,...

State of the Art
The structural engineering of San Francisco's new Museum of Modern Art offered many challenges to the engineer. The complexity of the building is both visually exciting and...

Reliability and Response Control of R/C Buildings
A damage model is summarized for the assessment of seismic damage of reinforced concrete structures. The model is to evaluate specific buildings that were damaged in Mexico City during...

Real-Time Control for a Robotic Rebar Bender
Job conditions and variability in the properties of the stock material combine in a rebar bending operation to create a challenging environment for a robotic bender. This paper reports...

Large Deformation Theory Using Truncated Rotations
Today's aerospace industry has advanced to the point of using optimum design techniques in virtually all applications. In structural elements, orthotropic fiber composite materials have...

Damage Tolerance of Thin Composite Reinforced Membrane Structures
Structural performance of fiber reinforced flexible composite membranes, designed as pressurized shelters for space exploration, is investigated via computational simulation. An integrated...

Late Stage Damage in G30-500/PMR-15 Laminates
Damage progression has been studied experimentally under tension using [0₂/90₆]_s...

Reservoir Estimates for the Sulpicius Gallus Region
Estimates presented here show that 1.1?10⁹ metric tons of oxygen could of produced from one of the enriched areas that have been detected by spectrographic...

Effects of Dust and Thermal Cycling on Telescope Mirror Performance
In this study, 1 cm ? 1 cm square optical-grade aluminized glass mirrors were measured for maximum light reflectance and then the loss of reflectance due to the presence of different specific...

Analysis of Glass-Ceramic Production from Lunar Resources
Two simulated regoliths were used to investigate the effects of processing and composition on the properties of lunar-derived glass-ceramics. For the simulant with moderate iron concentration,...

High-Strength Concrete Columns in High-Rise Buildings
Strength and ductility of high-strength concrete columns were investigated by examining available test data. The results are summarized in terms of load and ductility capacities of columns....

Corrosion Resistant Epoxy-Coated Reinforcing Steel
Research conducted in the 1970s to evaluate and develop criteria for nonmetallic coatings to protect steel reinforcing bars embedded in concrete bridge decks from the corrosive action...

Recent Developments in Seismic Response of Composite Structures
Lack of sufficient data has limited a wider application of structures using mixed steel-concrete construction in seismically active regions. This paper summarizes some recent studies at...

Marta North Line Midtown Station
This paper presents a case study of a cast-in-place concrete rapid transit station structure. Attention is focused on the performance of the monolithically connected, three-dimensional...

Shock-tested R. C. Slabs: Significant Parameters
Shock-tube tests of plain concrete and reinforced concrete (R. C.) slabs were performed. The influence of free water in concrete pores, emphasized in previous tests at a material level,...

Strut-Tie Model Design of Disturbed Regions in Concrete Structures
The design of disturbed (highly non-linear behavior) regions in concrete structures is illustrated using strut-tie approach. The use of this approach assisted with interactive computer...

Behavior of RC Beams under Sustained Load
Experimental results of eight reinforced concrete beams under 3-month's sustained load, with the ratio of shear span to depth equal to 2.5, are reported. It is shown by tests that the...

 

 

 

 

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