GEOTECHNICAL DESIGN AND INSTALLATION OF SUCTION ANCHORS IN CLAY

This Recommended Practice is based on the results from the Joint Industry Project “Reliability-Based Calibration of Design Code for Suction Anchors” /1/. This Recommended Practice includes a design code for suction anchors. The design code is recommended by DNV for use in designing suction anchors in clay. The design code is a more formal part of the Recommended Practice in that it specifies requirements, rather than guidance, with respect to which design rules shall be satisfied and which partial safety factors shall be used in the design.

Dynamics: Theory and Application

Proceedings of the International Workshop on
Sustainable Development and Concrete Technology

The International Workshop on Sustainable Development and Concrete Technology is being held to address the role of portland cement concrete materials and construction in sustainable development. The main purpose of the workshop is to promote global interaction and research collaboration for a better understanding of sustainable development as applied to concrete technology. China’s economic growth and its impact on the global environment have received a great deal of attention. China is now the world’s largest cement producer and consumer. China’s cement production in 2003 was over 800 million tons, more than one-third of the world’s supply. Sustainable development in China is urgent. The workshop is sponsored by the National Science Foundation, USA, and cosponsored by American Concrete Institute International, USA, the Center for Advanced Cement-Based Materials, Northwestern University, USA, and many distinguished organizations in the People’s Republic of China. The workshop is organized by Iowa State University, USA, and Tsinghua University, PRC, and hosted by Tsinghua University. The international workshop includes two major themes: (1) critical issues of sustainable development and emerging technology for “green” concrete and (2) concrete durability and sustainable system. This volume of proceedings contains 31 papers presented at the workshop, about half of which are keynote and invited papers from eminent international experts. In addition to the paper sessions, the workshop includes a panel discussion on the future directions of sustainable development and international collaborations.

The Use of Limestone in Portland Cement

Data from published literature and laboratory tests regarding use of limestone in portland cement are reviewed. Emphasis is placed on amounts of 5% or less. The effects of interground and blended limestone on the particle size distribution of cement and workability of mortar and concrete are reported. Hydration behavior is examined with regard to chemistry, heat evolution, microstructure, and setting time. The properties of hardened mortar and concrete made with limestone portland cement are examined and compared to those made with non-limestone portland cements–including compressive and flexural strength, volume stability, durability (permeability, carbonation, freeze/thaw resistance, sulfate and chloride resistance, and alkali-silica reaction), and interactions with mineral and chemical admixtures. Quality control of the limestone, limestone portland cement, and concrete is also discussed. In general, the use of up to 5% limestone does not affect the performance of portland cement. Strengths of cements with limestone can be optimized by grinding to an appropriate particle size distribution. An optimized portland cement containing up to 5% limestone can exhibit improvements in workability as compared to the same cement without limestone. Energy requirements for both pyroprocessing and comminution are reduced by the use of limestone.

Linking Models and Experiments, Volume 2: Proceedings of the 29th IMAC, A Conference on Structural Dynamics, 2011

Linking Models and Experiments, Volume 2. Proceedings of the 29th IMAC, A Conference and Exposition on Structural Dynamics, 2011, the second volume of six from the Conference, brings together 33 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on Finite Element Techniques, Model Updating, Experimental Dynamics Substructuring, Model Validation, and Uncertainty Quantification.

1 Modal Testing and FE-model Validation of Azimuthing Thruster 1
V. Nieminen, VTT Technical Research Centre of Finland; M. Tervonen,
Seinäjoki University of Applied Sciences
2 POD Based Computation of Joint Interface Modes 19 of Mechatronics GmbH
3 Area Wise Application of Contact Constraints in Reduced Mechanical Systems 29
4 On the Extension of Global Vibration Modes With Ritz-vectors Needed for Local Effects 37
of Applied Sciences; H. Irschik, H. Holl, Johannes Kepler University - Linz; K. Mayrhofer, Siemens VAI Metals Technologies GmbH
5 Direct Decoupling of Substructures Using Primal and Dual Formulation 47
6 Spectral Analysis of Vibrating Plates With General Shape 77
G. Catania, S. Sorrentino, University of Bologna
7 Smoothing Experimental Data in Dynamic Substructuring of Built up Systems 89
A. Culla, Università di Roma La Sapienza; W. D'Ambrogio, Università dell'Aquila;
A. Fregolent, A. Schiavone, Università di Roma La Sapienza
8 Metrics for Diagnosing Negative Mass and Stiffness When Uncoupling Experimental and Analytical Substructures 111
M.S. Allen, D.C. Kammer, University of Wisconsin-Madison; R.L. Mayes,
9 Propagation of Free-interface Substructure Uncertainty into System Test-analysis Correlation 135
D.C. Kammer, S. Nimityongskul, D. Krattiger, University of Wisconsin W. D'Ambrogio, Universita dell'Aquila; A. Fregolent, Universita di Roma La Sapienza W. Witteveen, University of Applied Sciences - Wels; K. Sherif, Linz Centre W. Witteveen, University of Applied Sciences - Wels K. Sherif, Linz Centre of Mechatronics GmbH; W. Witteveen, University Sandia National Laboratory viii
10 Feature Extraction for Structural Dynamics Model Validation 153
University of Sheffield; G. Park, Los Alamos National Laboratory; N. Takeda,
11 Hybrid Sets of Merged Data for Modal Model Applications 165
L. Thibault, B. LeBlanc, P. Avitabile, University of Massachusetts Lowell
12 Dynamic Uncoupling of a System Model for Component Identification 173
D. Cloutier, P. Avitabile, University of Massachusetts Lowell
13 Full Field Dynamic Stress/Strain From Limited Sets of Measured Data 187
P. Pingle, P. Avitabile, University of Massachusetts Lowell
14 Limited Experimental Displacement Data Used for obtaining Full-field Dynamic
Stress Strain Information 201
P. Pingle, P. Avitabile, University of Massachusetts Lowell
15 A Survey of Techniques to Estimate the Uncertainty in Material Parameters 219
T. Simmermacher, Sandia National Laboratories
16 Construction of DEM-base Traffic Model Using Optimal Velocity Model 231
T. Koizumi, N. Tsujiuchi, R. Akatsuka, Doshisha University
17 Confidence Intervals of Modal Parameters During Progressive Damage Test 237
L. Mevel, INRIA; W. Rücker, BAM Federal Institute for Material Research and Testing
18 Identification of Material Properties of Composite Plates Utilizing Model Updating
and Response Surface Techniques 251
K. Gurses, B. Kuran, C. Gencoglu, Roketsan A.S.
19 Globally Enriched Substructuring Techniques for Vibro-acoustic Simulation 263
U. Tabak, D.J. Rixen, Delft University of Technology
20 A Modal-geometrical Selection Criterion for Master Nodes: Numerical and Experimental
Testing 281
E. Bonisoli, C. Delprete, C. Rosso, Politecnico di Torino
21 Robust Optimization and Quality Control in Spot Welded Structures 297
Q.I. Bhatti, M. Ouisse, S. Cogan, Université de Franche-Comté
22 Interface Reduction in the Dual Craig-Bampton Method Based on Dual Interface Modes 311
D.J. Rixen, Delft University of Technology
23 A Truly Hybrid Approach to Substructuring Problems Using Mixed Assembly
and Implicit Solving Strategies 329
S.N. Voormeeren, P.L.C. van der Valk, D.J. Rixen, Delft University of Technology
M. Nishio, University of Tokyo; F. Hemez, Los Alamos National Laboratory; K. Worden,
University of Tokyo; C. Farrar, Los Alamos National Laboratory M. Döhler, INRIA; F. Hille, BAM Federal Institute for Material Research and Testing; X.-B. Lam, ix
24 Model Updating Methodologies for Multibody Simulation Models: Application to a Full-scale Wind Turbine Model 349
S. Manzato, B. Peeters, A. Toso, H. Van der Auweraer, LMS International; R. Osgood,
National Renewable Energy Laboratory
25 DOF Reduction Strategy for Large Order Finite Element Models 359
R.N. Coppolino, Measurement Analysis Corporation
26 Understanding Large Order Finite Element Model Dynamic Characteristics 367
R.N. Coppolino, Measurement Analysis Corporation
27 FEM Sensitivity Method for Uncertainty and Reconciliation Analyses 375
R.N. Coppolino, Measurement Analysis Corporation
28 Uncoupling Techniques for the Dynamic Characterization of Sub-structures 383
F.C. Batista, Polytechnic Institute of Leiria; N.M.M. Maia, University of Lisbon
29 Receptance Based Normalization of Operational Mode Shapes 393
D. Bernal, Northeastern University
30 Fault Simulation in a Gearbox Using Finite Element Model Reduction Techniques 399
L. Deshpande, N. Sawalhi, R.B. Randall, University of New South Wales
31 Response Measurements of DMS Cabinets and Supporting Truss Structures Under
Environmental and Transient Wind Loads 411
32 Variance Decomposition in the Presence of Epistemic and Aleatory Uncertainty 417
33 A Forecasting Metric for Predictive Modeling 431
S. Atamturktur, Clemson University; F. Hemez, C. Unal, Los Alamos National Laboratory