This s tudy a s se s se s the energy savings and cost-effect iveness of individual retrofi t op t ions and packages of measu res in s ingle-family buildings, ba sed on analysis of me te red energy consumpt ion and actual installation costs. We present results for 14 individual shell, heating system, and water heating measures, as well as 21 electric utility weatherization programs. The data on ...

Oxyfuel-firing of a steam boiler is a low risk high-efficiency technique for CO2 capture in a power plant. Oxyfuel-firing can be readily adapted to a new power plant or to retrofit applications. Development and design of pulverized coal and circulating fluidized bed oxyfuel boilers and balance of plant equipment have been conducted to identify the required specific features, which will maximize...

This study focuses on developing fragility-based seismic vulnerability assessment techniques for seismically retrofitted multi-column bridge bent. Fragility curves are developed using Probabilistic Seismic Demand Model (PSDM) to assess the relative performance of different retrofit methods under near fault ground motions. Two different retrofit techniques namely CFRP jacketing and ECC jacketing...

The case studied in the paper proves that thickening the pile cap is an effective seismic retrofit alternative to strengthen a pile group foundation. Unlike the typical seismic retrofitting of foundation, the proposed method eliminates the need to drive long piles into existing bridge substructures, substantially reducing cost, construction time and traffic interruption. The method thickens the...

A new retrofit targeting procedure, based on pinch technology has been developed. The new procedure considers existing structure of a given network and finds the most compatible configuration with the network. To achieve this aim, the procedure uses a linear programming technique that maximize the compatibility. Good compatibility between old and new networks helps to make the best use of c...

In this study, a dynamic model was developed to simulate the housing stock in the North East region of England. This model takes input from the English Housing Survey database and uses EnergyPlus as its simulation engine. A range of retrofit options was applied to the housing stock, to examine the possible CO2 reductions corresponding to different scenarios. By embedding a multi-objective optim...

This paper describes an approach used to develop retrofit strategies for hospitals and other critical facilities in low to moderate seismic hazard zones, where strong earthquakes are infrequent, but if they should occur, the consequences would be high. Hospitals in New York State and other urban centers in the eastern U.S. fall into this category, where seismic retrofit requires information on ...

The unanticipated brittle fracture of connection of the steel moment resisting frame (SMRF) occurred in 1994 the Northridge earthquake. Since then, the researches for the vulnerability of connection of the existing SMRF and for rehabilitation of those buildings were conducted. This paper suggests performance-based optimal seismic retrofit technique using connection upgrade. For optimal design, ...

In this paper, we propose a retrofit control method for stable network systems. The proposed approach is a decentralized control method that, rather than an entire system model, requires a model of the subsystem of interest for controller design. To design the retrofit controller, we use a novel approach based on hierarchical state-space expansion that generates a higherdimensional cascade real...

A case study of retrofitting a 20-story pre-Northridge steel moment-frame building is presented. Twelve retrofit 4 schemes are developed with varying degrees of intervention. Three retrofitting techniques are considered: up5 grading the brittle beam-to-column moment resisting connections, and implementing either conventional or 6 buckling-restrained brace elements within the existing moment-fra...