Los Angeles Tall Buildings Structural Design Council (LATBSDC)
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LATBSDC 2013 Conference
Advances in Structural Design for Seismic Regions
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An Alternative Procedure For Seismic Evaluation and Strengthening of Tall Reinforced Concrete Buildings Located in the Los Angeles Region by N. Delli Quadri
Efficient Performance Based Design Using Parallel and Cloud Computing by C.E. Ventura and A. Bebamzadeh
NGA-West2 Research Program by Yousef Bozorgnia
City of Los Angeles Peer Review Process by Colin Kumabe
Seismic Performance of Shear Wall Buildings with Gravity-Induced Lateral Demands by Michael Dupuis, Tyler Best, Ken Elwood, and Don Anderson
Issues with the Peer Review Process by Farzad Naeim
Design of a 35 Story Building In Los Angeles Using the LADBS Performance Based Design Methodology
Large-Scale Testing of Steel Reinforced Concrete (SRC) Coupling Beams by Christopher J. Motter, John W. Wallace, Ron Klemencic, John Hooper, and Dave Fields
Structural Mitigation for Seismically Induced Permanent Ground Displacement by Craig D. Comartin
Nonlinear Response-History Analysis for the Design of New Buildings - A Proposed Updated to ASCE7 Chapter 16 by Curt B. Haselton
Seismic Design of Reinforced Concrete Mat Foundations by Ron Klemencic
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Posted by: ykhackhack - 05-31-2014, 01:44 AM - Forum: Drawings
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Residential Pool with Helical Piles
Size: 246 KB
DWG format reusable details
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Nonlinear Dynamic Analysis of Reinforced Concrete Building Structures
Author: SHUNSUKE OTANI | Size: 1.2 MB | Format:PDF | Quality:Unspecified | Publisher: Department of Civil Engineering, University of Toronto, Toronto, Ontario, Canada M5S 1A4 Received January 10，1979 Revised manuscript accepted March 31980 | Year: 1979 | pages: 19
This state-of-the-art paper discusses nonlinear dynamic analysis of reinforced concrete building structures. Nonlinear analysis of a reinforced concrete building is difficult (a) because inelastic deformation is not confined at critical sections, but spreads throughout the structure; and (b) because stiffness of the reinforced concrete is dependent on a strain history. The paper reviews the behaviour of reinforced concrete members and their subassemblies observed during laboratory tests. Then different hysteresis and analytical models of reinforced concrete members are reviewed, and their application to the simulation of building model behaviour is discussed.
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Shear-wall dominant multistorey reinforced concrete structures, constructed by using a special tunnel
form technique are commonly built in countries facing a substantial seismic risk, such as Chile, Japan,
Italy and Turkey. In spite of their high resistance to earthquake excitations, current seismic code provisions
including the Uniform Building Code (International Conference of Building Ocials, Whittier,
CA, 1997) and the Turkish Seismic Code (Specication for Structures to be Built in Disaster Areas,
Ankara, Turkey, 1998) present limited information for their design criteria. In this study, consistency
of equations in those seismic codes related to their dynamic properties are investigated and it is observed
that the given empirical equations for prediction of fundamental periods of this specic type of
structures yield inaccurate results. For that reason, a total of 80 dierent building congurations were
analysed by using three-dimensional nite-element modelling and a set of new empirical equations was
proposed. The results of the analyses demonstrate that given formulas including new parameters provide
accurate predictions for the broad range of dierent architectural congurations, roof heights and
shear-wall distributions, and may be used as an ecient tool for the implicit design of these structures.
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Author: BABAK RAJAEE RAD | Size: 4.5 MB | Format:PDF | Quality:Unspecified | Publisher: THE UNIVERSITY OF BRITISH COLUMBIA | Year: 2009 | pages: 268
Concrete shear walls are used as the seismic force resisting system in many high-rise buildings in Western Canada. During earthquake, the response of a high-rise concrete wall as it undergoes severe cracking of concrete and yielding of reinforcement is very complex. In particular, the nonlinear shear behaviour of concrete shear walls is not well known; therefore available analysis programs generally use very primitive models for nonlinear shear behaviour. Gérin and Adebar (2004) quantified the observed experimental results on reinforced concrete membrane elements and presented a simple
nonlinear shear model that included the influence of concrete diagonal cracking, yielding, of horizontal reinforcement and ultimate shear capacity. There are a number of important issues in the design of high-rise concrete shear walls where shear deformations play a very important role and hence nonlinear shear behaviour will have a significant influence. In this dissertation, three different seismic design issues where nonlinear shear response plays a significant role are investigated.
The first issue which is of considerable concern to designers is the large reverse shear force in high-rise concrete walls due to rigid diaphragms below the flexural plastic hinge. The nonlinear analyses that were carried out in this study show that diagonal cracking and yielding of horizontal reinforcement significantly reduce the magnitude of reverse shear force compared to what is predicted by using linear analysis procedures. A second issue where nonlinear shear behaviour has a significant influence is associated with the shear force distribution between inter-connected high-rise walls of different lengths. The results presented in this work, show that when diagonal cracking is included in the analysis, significant redistribution of shear forces takes place between walls and all walls do not necessarily yield at the same displacement.
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DYNAMIC RESPONSE OF HIGH RISE STRUCTURES UNDER THE INFLUENCE OF DISCRETE STAGGERED SHEAR WALLS
Author: Dr. B. KAMESHWARI * Professor and Head, Department of Civil Engineering, R.V.S. College of Engineering and Technology, Dindigul. Dr. G. ELANGOVAN Associate Professor, Controller of Examinations, Anna University of Technology Madurai, Madurai P. SIVABALA, Assistant Professor, Department of Civil Engineering, Sree Buddha College of Engineering, Pattoor, Kerala G.VAISAKH Assistant Professor, Department of Civil Engineering, Sree Buddha College of Engineering, Pattoor, Kerala | Size: 316 MB | Format:PDF | Quality:Unspecified | Publisher: International Journal of Engineering Science and Technology (IJEST) ISSN : 0975-5462 Vol. 3 No.10 October 2011 7789 | Year: 2011 | pages: 10 | ISBN: 0975-5462
Abstract- It is well-established fact that shear walls are quite effective in lateral load resistance of low-rise to
medium-rise reinforced concrete buildings. Restriction in the architectural design by the presence of the shear
walls may contribute to discourage the engineers from adopting the shear walls. Due to this a new concept of
providing storey deep and bay wide discrete staggered shear wall panels have been introduced.
In this study, the effect of various configurations of shear walls on high-rise structure is analysed. The drift
and inter-storey drift of the structure in the following configurations of shear wall panels is studied and is
compared with that of bare frame: (1) Conventional shear walls. (2) Alternate arrangement of shear walls. (3)
Diagonal arrangement of shear walls. (4) Zigzag arrangement of shear walls. (5) Influence of lift core walls.
Of the configurations studied, the zigzag shear wall configuration is found to be better than the other systems
studied in controlling the response to earthquake loading. The diagonal configuration is found to be having
significant role in controlling the response of structures to earthquake.
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Dynamic Analysis of Reinforced Concrete Building with Plan Irregularities
Author: Mohammed yousuf , P.M. shimpale | Size: 867 KB | Format:PDF | Quality:Unspecified | Publisher: International Journal of Emerging Technology and Advanced Engineering Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 3, Issue 9, September 2013) | Year: 2013 | pages: 07
Abstract— The main objective of earthquake engineering is
to design and build a structure in such a way that the damage
to the structure and its structural component during an
earthquake is minimized. This paper aims towards the
dynamic analysis of reinforced concrete building with plan
irregularity. Four models of G+5 building with one symmetric
plan and remaining irregular plan have been taken for the
investigation. The analysis of R.C.C. building is carried out
with the FE based software ETABS 9.5. Estimation of
response such as; lateral forces, base shear, storey drift, storey
shear is carried out. Four cross sectional variation in columns
section are considered for studying effectiveness in resisting
lateral forces. The paper also deals with the effect of the
variation of the building plan on the structural response
building. Dynamic responses under prominent earthquake,
related to IS 1893–2002(part1) have been carried out. In
dynamic analysis; Response Spectrum method is used. The
CQC (complete quadratic combination) method has also been
employed for each model for estimation of dynamic response
for 5%, 10%, 15%, and 20% damping and dynamic responses
were compared.
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Solution of Shear Wall Location in Multi-Storey Building
Author: Anshuman. S , Dipendu Bhunia , Bhavin Ramjiyani | Size: 457 KB | Format:PDF | Quality:Unspecified | Publisher: INTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 2, No 2, 2011 | Year: 2011 | pages: 14
Shear wall systems are one of the most commonly used lateral-load resisting systems in highrise buildings. Shear walls have very high in-plane stiffness and strength, which can be used to simultaneously resist large horizontal loads and support gravity loads, making them quite advantageous in many structural engineering applications. There are lots of literatures
available to design and analyse the shear wall. However, the decision about the location of shear wall in multi-storey building is not much discussed in any literatures. In this paper, therefore, main focus is to determine the solution for shear wall location in multi-storey building based on its both elastic and elasto-plastic behaviours. An earthquake load is calculated and applied to a building of fifteen stories located in zone IV. Elastic and elasto-plastic analyses were performed using both STAAD Pro 2004 and SAP V 10.0.5 (2000) software packages. Shear forces, bending moment and story drift were computed in both the cases and location of shear wall was established based upon the above computations.
I
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Author: Tarun R. Naik,1 M. ASCE, Sandor Kaliszky,2 M. ASCE and Lawrence A. Soltis,3 M. ASCE | Size: 215 KB | Format:PDF | Quality:Unspecified | pages: 06
Shear walls play a dominant role in the static and dynamic analysis and design of low-rise timber buildings. Shear wall behavior is often difficult to describe. For example, low-rise timber buildings have shear walls made of lumber framing and various sheathing materials. The loaddeformation
plot of a shear wall, when subjected to horizontal loads, is
nonlinear. The analysis of a shear wall building thus requires either full-scale test or nonlinear analysis. Full-scale tests do demonstrate true nonlinear behavior; however, they are often too time consuming and expensive for the number of replications necessary for a statisticallyvalid study. Nonlinear analysis often involves mathematical complexity and instability such that limiting assumptions are necessary to simplify the problems. This study describes a mechanical model which simulates the nonlinear behavior of a shear wall and aids in the construction of inexpensive models of entire shear wall buildings. Static and dynamic measurements obtained using these models can provide reliable results for shear wall buildings. Tests on these wall models will be useful to: (1) Observe nonlinear behavior of the "parent"structure without having to conduct fullscale tests; (2) check the accuracy of linear analysis; and (3) verify the results of nonlinear analysis.
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Simulation of the shaking table test of a seven-story shear wall building
Author: Paolo Martinelli , and Filip C. Filippou | Size: 623 KB | Format:PDF | Quality:Unspecified | Publisher: EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS Earthquake Engng Struct. Dyn. 2009; 38:587–607 Published online 13 February 2009 in Wiley InterScience. DOI: 10.1002/eqe.897 | Year: 2009 | pages: 21
This paper presents the simulation of the nonlinear dynamic response of a full-scale seven-story reinforced
concrete shear wall shaking table specimen under base excitations representing four earthquake records
of increasing intensity. The study was motivated by the participation in the blind prediction contest of
the shaking table specimen organized by University of California at San Diego (UCSD), NEES, and
Portland Cement Association (PCA). Owing to the time constraints of the contest a relatively simple
two-dimensional (2d) model was used for the shear wall specimen. In this model, the shear wall was
represented by 2d beam–column elements with fiber discretization of the cross-section that account for
the interaction of the axial force with the bending moment. Upon conclusion of the contest, the available
experimental measurements permitted a thorough examination of the analytical results. While the measured
data confirmed the excellent accuracy of the model predictions, some limitations also became apparent.
The paper addresses the benefits and limitations of the selected modeling strategy and investigates the
sensitivity of this type of model to parameter selection.
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