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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 15 Abstracts search results
Document:
SP285-14
Date:
May 1, 2012
Author(s):
Vladimir I. Yagust and David Z. Yankelevsky
Publication:
Symposium Papers
Volume:
285
Abstract:
This paper deals with a moment resisting steel frames building with reinforced concrete monolithic or precast floors and precast reinforced concrete exterior curtain wall panels. It examines the building's stability against the possible development of a progressive failure that follows an initial local failure (ILF), such as a collapse of a single column and the adjacent walls. It is assumed that the building has survived the short term ILF failure event and the analysis is focused on the residual strength and stability of the damaged building under static conditions due to both the dead and live loads acting on its floors. The proposed analysis employs the kinematical method of the limit equilibrium theory of plastic systems, and examines major possible kinematic schemes of plastic collapse of the frame above the locus of ILF at the facade of the building, taking into account the plastic failure of the different structural members. The overall stability of the building under a given failure scheme is examined by comparison of the work done by the internal generalized forces in the plastic hinges on corresponding generalized displacements due to a virtual kinematic downward displacement with the work done by the external forces on corresponding displacements resulting from the same virtual kinematic displacement of the supporting building elements above ILF.
DOI:
10.14359/51683937
SP285-12
Eric Peterson
This paper is based upon a presentation given in honor of Dov Kaminetzky’s long-term interest in the design of formwork, as it forms the major link in the successful execution of cast-in-place concrete structures. The intent is to illustrate how the design documents are viewed from a formwork builder’s perspective. Through the use of the example of one project, The Cathedral of Christ the Light, Oakland California, the use of the design documents are presented and discussed in terms of the information provided by the designer and how the formwork builder processes and utilizes this information to successfully produce the finished structure. The presentation follows a process of utilizing design provided information to complete the geometric information needed to construct the formwork, and the verification methods utilized throughout planning and construction. It highlights a particular and careful intermediate process, which takes place between the design and a completed concrete structure.
10.14359/51683935
SP285-9
Surendra Manjrekar and Ishita Manjrekar
This paper maps the development of Anti-washout admixtures for the first time on the Indian subcontinent. Anti washout admixture was required to be used for the construction of a weir for the SriSalem Dam across the Krishna River in Andhra Pradesh, India. The project required 30000 cubic meters of concreting to be done under water without the erection of a cofferdam and the project cost was estimated to be about $5.6 million. The consultants were SNC Lavelin, Canada and the contractors were Patel Engineering, India. Since there were no manufacturers of anti washout admixture in India, this was a significant development from Sunanda Speciality Coatings Pvt. Ltd.’s lab involving over 100 trials that culminated in about 90000 liters of the admixture being used in the project.
10.14359/51683932
SP285-10
Luke M. Snell
This paper is based on a presentation in honor of Dov Kaminetzky’s long-term interest in how to use reinforcement location techniques in evaluating concrete structures. All methods of locating reinforcement are spot specific and can be used to determine the location of a particular reinforcement. In most cases, the engineer or contractor needs to confidently determine the location of the entire reinforcement system used in a member. This requires a detailed sampling plan to be developed and to use appropriate statistical methods. This paper describes four different reasons why reinforcement may need to be located within a structure and present a statistical method that is appropriate for each of these methods.
10.14359/51683933
SP285-1
Jose M. Izquierdo-Encarnacion
In honor of Dov Kaminetzky, two case stories are discussed; one to reflect his passion for the correct usage and design for concrete and the other his other great passion, the forensic and technical evaluation of existing structures.
10.14359/51683924
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