Semi-active control devices have received significant attention in recent years because they offer the adaptability of active control devices without requiring the associated large power sources. Magnetorheological (MR) dampers are semi-active control devices that use MR fluids to produce controllable dampers. They potentially offer highly reliable operation and can be viewed as fail-safe in th...

The topic of the 2012 ASCE Conference is “Where is Cuba Going?” This begs the answer in the subtitle of this paper. There is a simple reason: political intolerance has plagued Cuban history from the start. And democracy can only flourish under tolerance. Tolerance means that one is willing and/or able to listen and understand the views of others, especially when they differ from our own. Hence,...

This paper presents an introduction to inference for copula models, based on rank methods. By working out in detail a small, fictitious numerical example, the writers exhibit the various steps involved in investigating the dependence between two random variables and in modeling it using copulas. Simple graphical tools and numerical techniques are presented for selecting an appropriate model, es...

Göçme öncesi sismik performans seviyesinde, kesmeye maruz betonarme kolonların yatay yük ve eksenel taşıma kapasitelerindeki azalmayı bu davranışların tüm yapıya etkilerini modellemeye tahmin etmeye ihtiyaç vardır. Kesme dayanımı ile deformasyon kapasite davranışlarının incelenmesi için farklı beton basınç dayanımı, seviyesi spiral donatı oranlarında dairesel kolon modelleri tasarlanmıştır. Tas...

Empirical data and statistical models are employed to predict where new highway routes are most likely to be located. The land use, population distribution, and highway network for the Twin Cities’ Metro Area from 1958 to 1990 are used. Binary logit models estimate the likelihood a particular cell will see the construction of divided highways and secondary highways. The results show that the ar...

The degree of dispersion of short microfibers in cement, as assessed by electrical resistivity measurement for the case of electrically conductive fibers at a volume fraction below the percolation threshold, is improved by the use of admixtures ~namely, silica fume, acrylic particle dispersion, methylcellulose solution, and silane! and fiber surface treatment ~such as ozone treatment!. Acrylic ...

This paper presents a new way of determining the compatibility conditions for statically indeterminate trusses. It is based on equations relating the angular displacements (rotations) of truss elements to the corresponding extensions obtained by requiring the displacements of the truss structure to be compatible, i.e., single valued. This new angular displacement method is likely to be most adv...

This guidance has been developed by integrating experience gleaned from field monitoring activities conducted by members of ASCE’s Urban Water Resource Research Council and through the development of the ASCE/EPA National Stormwater Best Management Practices Database. The manual is intended to help achieve stormwater BMP monitoring project goals through the collection of more useful and represe...

Proceedings of the 1997 ASCE Structures Congress, Portland, Oregon, April 13-16, 1997. In this paper, both the methods of continuous sliding mode control (CSMC) and continuous sliding mode control with a compensator (CSMC&C) are applied to a benchmark problem; namely, an active mass driver system. For these control strategies, salient features of the controller design and their merit are descri...