Purpose the purpose of this engineer pamphlet ep is to provide preliminary guidance and direction for the earthquakeresistant design of new roller compacted concrete rcc dams, and for the evaluation of safety and serviceability of existing rcc dams. This proportioning method involves establishing a relationship between the density and moisture content of an roller compacted concrete mixture to obtain the maximum density by compacting samples over a range of moisture. Construction of an rcc dam is a relatively new and economical concept. For seismic areas, higher design compressive strength is often. Design and construction considerations for hydraulic structures. Buildings designed using these principles will fare better in a seismic event than the building shown in this slide. According to usaceep1110212, seismic design provisions for roller. Study of restrictions on rcc temperature, stage 2 development of ipoh water supply engineering and design seismic design provisions for rollercompacted concrete dams, engineering manual, em 1110212. But the construction methods, concrete mix design, and details of the appurtenant structures are different in these structures. Seismic design of reinforced concrete structures 465 10. Roller compacted concrete dams seismic retrofitting. Note that some of the examples in this topic draw heavily on the examples in the fema 451, nehrp recommended provisions. Rollercompacted concrete for dam safety modifications. The development in roller compacted concrete rcc is replacing the.
Jul 16, 20 the history, design, and state of the art of gravity dams are essentially linked to three different construction methods. Dec 20, 2017 concrete faced rockfill dams cfrd and roller compacted concrete rcc gravity dams are the primary choices for dam construction due to the ease and speed of construction. Conventional concrete and roller compacted concrete are both addressed. Tours will be arranged to longtan rcc gravity dam h216.
Roller compacted concrete rcc has been utilized in dam construction since the late 1970s. The provided range of the damage is calculated according to the. Curved gravity dams designed for arch action and other types of concrete gravity dams are not covered in this manual. Study of restrictions on rcc temperature, stage 2 development of ipoh water supply engineering and design seismic design provisions for rollercompacted concrete dams, engineering manual, em 11102. Rollercompacted concrete rcc has been utilized in dam construction since the late 1970s. Rollercompacted concrete, design and construction considerations for. Rollercompacted concrete rcc is used throughout the world for new dam construction. January 2000 engineering and design roller compacted concrete purpose the purpose of this manual is to provide information and guidance on the use of rollercompacted concrete rcc in dams and other.
Seismic design of liquidcontaining concrete structures. Based on a nonlinear approach, seismic safety evaluation of concrete dams allows engineers to build models that account for nonlinear phenomena such as vertical joint slippage, cracks, and cavitation. This paper compares the analysis of a roller compacted concrete rcc dam with and without galleries under seismic loading. Dam design and construction, reservoirs and balancing lakes. Roller compacted concrete rcc became an accepted method for dam construction during the latter half of the 1980s and during the early 1990s there has been a very rapid growth in this form of dam. The differences lie in the construction methods, concrete mix design, and details of the appurtenant structures. The purpose of this manual is to provide information and guidance on the use of roller compacted concrete rcc in dams and other civil works structures. Consequently, the design of a gravity dam must be substantially different in terms of the vibrated or compacted concrete. Roller compacted concrete rcc is used throughout the world for new dam construction. Engineering and design roller compacted concrete 1. The boc describes the details on how best to prepare this material so it can be used efficiently. During this lesson you will learn the basics of seismic design of reinforced concrete buildings.
Design specification for roller compacted concrete dams. High dams up to 200 m in height and containing several million m. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. Rcc dam, seismic analysis, damreservoirfoundation interaction. Influence of construction interfaces on dynamic characteristics of roller compacted concrete dams, journal of central south university, 22, 4, 1521, 2015. Group work included design of new and modified concrete dams and appurtenant structures such as spillways, outlet works, bridges, powerplants, fish bypass, and other reinforced concrete structures.
This new, fourth edition presents practicing engineers with time saving analysis, design, and detailing methods of primary framing members of a reinforced concrete building. However, predicting the performance of concrete dams during earthquakes is one of the most complex and challenging problems in structural dynamics. Roller compacted concrete gravity dams involve a new construction technique designed to reduce material and labour costs. Therefore, if conditions admit of an embankment, that type of dam is usually to be preferred. Roller compacted concrete rcc dams are designed as conventional concrete structures. The worlds largest rollercompacted concrete dams 2015. This document provides a guideline specification useful for developing project specifications for roller compacted concrete rcc as an exposed rcc pavement surface, that may or may not be diamond ground for smoothness andor texture. Three dimensional finite element analyses were rarely employed in the design of concrete. The effects of different sizes and shapes circle, octagon and square of gallery have also seen in the analysis. Revised and updated to aci 31811, it incorporates seismic and wind load provisions to comply with the international building code 2009 ibc. The rcc dam is provided with the state of the art instrumentation works at various. Seismic retrofitting dams is a vital part of maintenance.
The design of gravity dams constructed by roller compacted cylinders rcc is similar to the design of. Gravity dams made of roller compacted concrete, or rcc, are considered separately, because the differences in the material and, above all, the different procedure for delivery to the worksite impose specific design constraints. Inspection of concrete and masonry dams fema guidelines course no. The strength of rcc is a function of wc ratio only for mixture with vebe time of 15 to 20 sec. Formally called the khun dan prakan chon dam, it is 93 m tall and 2,720 m long. Engineering and design seismic design provisions for roller compacted concrete dams 1. The development of a new dam or reservoir, the final choice of site and design of the structure will depend not only on the topography but also on the geology, seismic. Bluegrass companies has over 3 decades of experience with rollercompacted concrete dams. The seismic design of concrete hydraulic structures concrete dams, locks, retaining walls, and other massive navigation or water control structures constitutes a complex and timeconsuming process that involves a variety of engineering disciplines. Provided by the springer nature sharedit contentsharing initiative. Seismic analysis of roller compacted concrete rcc dams.
Dams and reservoirs dams and reservoirs are crucial for the storage of water, whether it is for potable water supply, flood alleviation, hydroelectricity, or irrigation. Elements discussed include investigation and selection of materials, mixture proportioning, material properties, design and. International conference roller compacted concrete. Inspection of concrete and masonry dams fema guidelines. Inspection of concrete and masonry dams module introduction overview of the module in this module, you will learn the recommended methods for inspecting concrete and masonry dams and for detecting deficiencies. Properties of hardened rcc are similar to those of conventionally placed concrete. Concerns about the seismic safety of concrete dams have been growing recently because the population at risk in locations downstream of major dams continues to expand and because the seismic design concepts in use at the time most existing dams were built were inadequate. Roller compacted concrete rcc dam have gained acceptance worldwide in a relatively short time due to their low cost, which is derived in part from their rapid method of construction. Threedimensional earthquake analysis of rollercompacted. Seismic assessment of concrete gravity dams using capacity estimation and damage indexes. Design strength of rcc dam is often based on long term strength 90 days, 120 days or even 1 year. Cancelroller compacted concrete rcc dams and concretefaced rockfill cfr dams.
The purpose of this manual is to provide information and guidance on the use of rollercompacted concrete rcc in dams and other civil works structures. Managed 15 to 25 civil engineers as the general manager gm for the waterways and concrete dams group. Mar 31, 2015 ten largest roller compacted concrete dams 2. Topic 11 seismic design of reinforced concrete structures. Mixed concrete are spread with bulldozer for 3 or 4 thin layers, then they are compacted about 10 times by vibratory roller. Development of design mix roller compacted concrete dam at. The design of rcc gravity dams is similar to conventional concrete structures. Seismic assessment of concrete gravity dams using capacity. The thickness of each lift for compaction of rcd concrete differs from that of rcc dam. Future trends in roller compacted concrete dam construction.
Moehle played a leading role on several teams to develop professional guidance and design standards, including improved seismic design. Rollercompacted concretercc dam have gained acceptance worldwide in a relatively short time due to their low cost, which is derived in part from their rapid method of construction. Then, the viscousspring artificial boundary vsab is adopted to simulate the radiation damping of their infinite foundations, and based on the marc software, a simplified seismic motion input method is. Cancelroller compacted concrete rcc dams and concrete faced rockfill cfr dams. Moehle played a leading role on several teams to develop professional guidance and design standards, including improved seismic design guidelines for california highway bridges atc 32. Rollercompacted concrete gravity dams involve a new construction technique designed to reduce material and labour costs. Recently, roller compacted concrete rcc dams have become one of the most. Then, the viscousspring artificial boundary vsab is adopted to simulate the radiation damping of their infinite foundations, and based on the marc software, a simplified seismic motion. The roller compacted concrete rcc technology has been applied in dam construction for about 35 years in the world because of their inherent advantages including speed of construction with consequent reduction in execution time affording significant reduction in cost. Seismic design provisions for roller compacted concrete dams. Seismic safety evaluation of concrete dams 1st edition. Pdf ground motion effect on a rollercompacted concrete rcc dams in the earthquake zone. For structures consisting of a section of concrete gravity dam within an embankment dam, the concrete section will be designed in accordance with this manual.
Procedures for seismic design or evaluation of these massive hydraulic. Compacted concrete dams19, when the computation accuracy of. He was founding director of the pacific earthquake engineering research center. The contractor is now preparing this material so it can be used for the rcc. The soil compaction method is the most widely used mixture proportioning method for roller compacted concrete pavements. Threedimensional earthquake analysis of rollercompacted concrete dams 2371 kf p ke f ke f r v bet f cfb e fdv e 3 where cf is the elasticity matrix consisting of diagonal terms in eq. Rollercompacted concrete dams constructed primarily with rollercompacted concrete rcc. This report compares two different dam types roller compacted concrete dam. Army corps of engineers policy and guidance for seismic design of dams by anjana chudgar1 and enrique e. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete. Concrete faced rockfill dams cfrd and rollercompacted concrete rcc gravity dams are the primary choices for dam construction due to the ease and speed of. Pdf mix proportions of concrete for roller compacted. In the united states, rcc is also used extensively for modifying dams with safety deficiencies including stability buttresses for concrete dams, overtopping protection for both concrete and embankment dams, and for constructing spillways. Guidelines for seismic rehabilitation of buildings fema 273.
High dams up to 200 m in height and containing several million m 3 of concrete are now being designed. Flexible foundation effect on seismic analysis of roller compacted. Pdf recently, roller compacted concrete rcc dams have become one of the most. Pdf threedimensional earthquake analysis of rollercompacted. International conference roller compacted concrete dams. Guidelines for evaluation and repair of masonry and concrete walls fema 306. The construction techniques utilized in rcc dams are analogous to those used for embankment dams. The standard includes provisions for seismic design of structures, as well as the provisions for determining live, flood, wind. Guide to the seismic load provisions of asce 705 illustrates key concepts and guides structural engineers in applying the most current thinking in this rapidly changing discipline to the design of new structures. Design and construction considerations for hydraulic.
Murat emre kartal, murat cavusli and ayse bengu sunbul, assessing seismic response of a 2d roller compacted concrete dam under variable reservoir lengths, arabian journal of geosciences, 10, 22, 2017. Roller compacted concrete dam i examensarbetet kallat rccd och en. Rcc technology has been applied in dam construction for about 30 years. The worlds largest rollercompacted concrete dams 201503. A fairly dry concrete mix is put into place and compacted using similar methods to those employed in the construction of embankment dams as shown in figure. Roller compacted concrete rcc in dam engineering came up in the early 1970s.
Apr 12, 2015 to study the influence of construction interfaces on dynamic characteristics of roller compacted concrete dams rccds, mechanical properties of construction interfaces are firstly analyzed. This material will be used to make roller compacted concrete rcc. The history, design, and state of the art of gravity dams are essentially linked to three different construction methods. Mix design of roller compacted concrete the constructor. To study the influence of construction interfaces on dynamic characteristics of roller compacted concrete dams rccds, mechanical properties of construction interfaces are firstly analyzed. Roller compacted concrete rcc is a concrete of noslump consistencyin its unhardened state that is transported, placed, and compacted using earth and rockfillconstruction equipment. Department of the interior bureau of reclamation technical service center denver, colorado september 201. Seismic assessment of a monolithic rcc gravity dam. Pdf flexible foundation effect on seismic analysis of roller. Rollercompacted concrete pavements as exposed wearing surface version 1. The development of rcc technology has provided a successful method of erosion protection for embankment dams, which has proven to be cost effective while affording a. First concrete gravity dam designed and built for roller.
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