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This book presents a comprehensive technical overview of the field at a level suitable for working practitioners as well as advanced undergraduate or introductory graduate architecture or engineering course. The book is structured as a logical progression through acoustic interactions. It will be particularly beneficial for architects and engineers working in fields where speech intelligibility, music appreciation, and noise isolation are critical.
This is comprehensive guide to the basics of acoustical science and its applications to architectural design.
Beginning with an architectural history, it reviews the fundamentals of acoustics, human perception and reaction to sound, acoustic noise measurements and noise metrics, and environmental noise. It then moves into wave acoustics, sound and solid surfaces, sound in enclosed spaces, sound transmission loss, sound transmission in buildings, vibration and vibration isolation, noise transmission in floor systems, noise in mechanical systems, and sound attenuation in ducts.
Chapters on specific design problems follow including treatment of multifamily dwellings, office buildings, rooms for speech, sound reinforcement systems, rooms for music, multipurpose rooms, auditoriums, sanctuaries, and studios and listening rooms. While providing a thorough overview of acoustics, it also includes the theory of loudspeaker systems and sound system modeling as well as an in-depth presentation of computer modeling, ray tracing and auralization.
CONTENTS
PREFACE
ACKNOWLEDGMENTS
1 HISTORICAL INTRODUCTION
2 FUNDAMENTALS of ACOUSTICS
3 HUMAN PERCEPTION and REACTION TO SOUND
4 ACOUSTIC MEASUREMENTS and NOISE METRICS
5 ENVIRONMENTAL NOISE
6 WAVE ACOUSTICS
7 SOUND and SOLID SURFACES
8 SOUND in ENCLOSED SPACES
9 SOUND TRANSMISSION LOSS
10 SOUNDTRANSMISSION in BUILDINGS
11 VIBRATION and VIBRATION ISOLATION
12 NOISE TRANSMISSION in FLOOR SYSTEMS
13 NOISE in MECHANICAL SYSTEMS
14 SOUNDATTENUATION in DUCTS
15 DESIGN and CONSTRUCTION of MULTI FAMILY DWELLINGS
16 DESIGN and CONSTRUCTION of OFFICE BUILDINGS
17 DESIGN of ROOMS for SPEECH
18 SOUND REINFORCEMENT SYSTEMS
19 DESIGN of ROOMS for MUSIC
20 DESIGN of MULTIPURPOSE AUDITORIA and SANCTUARIES
21 DESIGN of STUDIOS and LISTENING ROOMS
22 ACOUSTIC MODELING. RAY TRACING, ...
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Posted by: Shahin - 11-11-2012, 05:16 AM - Forum: Archive
- No Replies
Dear members
Full title: Wave Propagation in Structures: Spectral Analysis Using Fast Discrete Fourier Transform
Author(s): James F. Doyle
Publisher: Springer, 2nd ed., 1997
Language: English
ISBN 978-0-387-94940-6
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Here you can find the German National Annexes to the Eurocodes.
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Some are missing:
DIN EN 1992-2/NA
DIN EN 1992-3NA
DIN EN 1993-3-1-NA
DIN EN 1996-1-2/NA
DIN EN 1999-1-3/NA
Some are in draft while the finals have been publihed already.
Durability Evaluation of Post-Tensioned Concrete Beam Specimens after Long-Term Aggressive Exposure Testing
Author: Turco, G P | Size: 4.24 MB | Format:PDF | Quality:Original preprint | Publisher: University of Texas, Austin | Year: 2007 | pages: 174
This report focuses on the forensic analysis and evaluation of large-scale post-tensioned beam specimens after nearly 8 years of extremely aggressive exposure testing. The research was funded jointly by both the Federal Highway Administration and the Texas Department of Transportation. The relationship between durability performance and the following variables was evaluated in this study: level of applied load and initial cracking, level of prestress, duct type, strand type, grout type, grouting method, use of encapsulated system for anchorage protection, and galvanized duct splice type. In addition, the applicability of half-cell potentials and chloride penetration tests for evaluating the likelihood of corrosion was examined. Major findings were: 1) Mixed reinforcement (also known as partial prestressing) performed poorly from a durability standpoint. Only fully prestressed beams offered better durability performance than those which were not prestressed at all. 2) Corrugated steel galvanized ducts performed very poorly. Large holes were found in the ducts, and in some cases several inches of the ducts completely corroded away. 3) Corrugated plastic ducts offer better performance as long as they are "robust." 4) Non-flowfilled epoxy coated strand and galvanized strand offered no significant improvement in long-term durability over conventional strand. 5) Installing plastic caps over anchorheads rather than just filling the anchorage pocket with nonshrink grout increases the long-term durability of the anchorage.
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Prestress Losses in Prestressed Bridge Girders Cast with Self-Consolidating Concrete
Author: Ruiz, Edmundo D Floyd, Royce W Staton, Blake W University of Arkansas, Fayetteville Do, Nam H University of Arkansas, Fayetteville Hale, W Micah University of Arkansas, Fayetteville | Size: 893 KB | Format:PDF | Quality:Original preprint | Publisher: Mack-Blackwell Transportation Center | Year: 2008 | pages: 94
The use of prestressed concrete bridges in Arkansas is becoming more common. The increase in steel costs has contributed to the popularity of prestressed bridge girders. Prestressed girders are particularly common in areas that border neighboring states (and these areas are also typically rural). Self Consolidating Concrete (SCC) is a recent advancement in the concrete industry. SCC is a type of concrete that can be placed without consolidation and is beginning to be widely accepted. Some states are allowing the use of SCC bridge girders. SCC is not much different from conventional concrete. The constituent materials are the same, but SCC typically contains more fine aggregate and cement, but less coarse aggregate. This research program examined the prestress losses of beams cast with SCC and compares those to losses of control beams cast with conventional concrete of the same compressive strength. Additionally, the research program examined the transfer and development length of SCC beams.
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Effects of Increasing the Allowable Compressive Stress at Release on the Shear Strength of Prestressed Concrete Girders
Author: Heckmann, Christopher University of Texas, Austin Bayrak, Oguzhan University of Texas, Austin | Size: 9.46 MB | Format:PDF | Quality:Original preprint | Publisher: University of Texas, Austin | Year: 2008 | pages: 173
In recent years, several research projects have been conducted to study the feasibility of increasing the allowable compressive stress in concrete at prestress transfer, currently defined as 0.60f'ci in the AASHTO LRFD Bridge Design Specifications. Increasing the limit would result in many economical and design benefits for the precast concrete industry, such as increased span lengths and faster turnover of beams in stressing beds. This research study focuses on the effects of increasing the allowable compressive stress at release on the shear strength of prestressed concrete members, a topic which has not yet been explored by past research projects. The current experimental work is funded under Texas Department of Transportation (TxDOT) Project 5197, which initiated in 2004 at the University of Texas at Austin. In the shear performance evaluation, 18 shear tests were performed. In the shear tests, the beams were loaded to fail in web-shear, with a shear span to depth ratio of 2.22. The diagonal cracking shears and shear capacities were experimentally measured for all specimens tested. All test specimens were TxDOT Type-C highway bridge girders (40-inch deep pretensioned I-beams) and were fabricated by three different precast plants in Texas. The compressive stress at release for the test specimens ranged from 0.56f'ci to 0.76f'ci. The measured cracking shears and shear capacities were compared to the estimated cracking shears and shear capacities, as calculated using ACI 318-08 and AASHTO LRFD (2007), and the effects of higher release stresses on shear strength and serviceability were evaluated by examining the conservativeness and accuracy of the predictions. Based on the experimental results summarized in this report, an increase in the allowable maximum compressive stress in concrete in the end regions of prestressed concrete beams at prestress transfer to 0.65f'ci or 0.70f'ci can be justified.
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Researchers conducted an experimental program to investigate the viability of producing self-consolidating concrete (SCC) using locally available aggregate, and the viability of its use in the production of precast prestressed concrete bridge girders for the State of Minnesota. Six precast prestressed bridge girders were cast using four SCC and two conventional concrete mixes. Variations in the mixes included cementitious materials (ASTM Type I and III cement and Class C fly ash), natural gravel and crushed stone as coarse aggregate, and several admixtures. The girders were instrumented to monitor transfer length, camber, and prestress losses. In addition, companion cylinders were cast to measure the compressive strength and modulus of elasticity, and to monitor the creep and shrinkage over time. The viability of using several test methods to evaluate SCC fresh properties was also investigated. The test results indicated that the overall performance of the SCC girders was comparable to that of the conventional concrete girders. The measured, predicted, and calculated prestress losses were generally in good agreement. The study indicated that creep and shrinkage material models developed based on companion cylinder creep and shrinkage data can be used to reasonably predict measured prestress losses of both conventional and SCC prestressed bridge girders.
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i need a paper which has examined behavior of sample 2d reinforced concrete moment frame under reverse load and .
i want to use this experimental model for modeling that in seismostruct software and check the experimental and analytical result of that under reverse load .
could you have this kind of paper?please if you have upload here ,
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