Control, Optimization, and Smart Structures High-Performance Bridges and Buildings of the Future

by Adeli, Hojjat; Saleh, Amgad

• ISBN13: 9780471350941
• ISBN10: 047135094X
• Edition: 1st
• Format: Hardcover
• Copyright: 1999-05-03
• Publisher: Wiley

Summary

A futuristic guide to smart structure technology

Through the use of active controllers, a structure can modify its behavior during dynamic loading such as impact, wind, or earthquake loading. Such structures with self-modification capability are called adaptive or smart structures. Smart structure technology prevents loss of life and damage to structures during natural disasters. This cross-disciplinary book features computational models and algorithms for active control of a new generation of large adaptive structures subjected to various types of dynamic loading. An important focus of the book is the optimization of both the structure and control systems in order to minimize costs. 

Author Biography

Hojjat Adeli is currently Professor of Civil and Environmental Engineering and Geodetic Science and Lichtenstein Professor in Infrastructure Engineering at The Ohio State University. A contributor to 70 Different scholarly journals, he has authored over 400 research and scientific publications in diverse areas of engineering, computer science, and applied mathematics since he received his PhD from Stanford University in 1976 at the age of 26. He has authored/co-authored nine pioneering books. His recent books are: Machine Learning - Neural Networks, Genetic, Algorithms, and Fuzzy Systems, John Wiley & Sons, 1995; Neurocomputing for Design Automation, CRC Press, 1998; Distributed Computer-Aided Engineering, CRC Press, 1999; High Performance computing in Structural Engineering, CRC Press, 1999; and Control, Optimization and Smart Structures High-Performance Bridges and Buildings of the Future, John Wiley & Sons, 1999. He has also edited twelve books including Intelligent Information Systems, IEEE computer Society, 1997. He is the Editor-in-Chief on two research journals: Computer-Aided Civil and Infrastructure Engineering and Integrated Computer-Aided Engineering. He has been a Keynote/Plenary Lecturer at 53 International computing conference held in 32 different countries. On September 29, 1998, he was awarded a patent for a "method and apparatus for efficient design automation and optimization, and structures produced thereby." He is the recipient of numerous academic, research and leadership awards, honors, and recognition. In 1998, he was awarded the University Distinguished Scholar Award by the Ohio State University in recognition of extraordinary accomplishment in research and scholarship and the Senate of the General Assembly of State of Ohio passed a resolution honoring him as an Outstanding Ohioan. He is the quadruple winner of the Ohio State University College of Engineering Lumley Outstanding Research Award. He has been an organizer or a member of the organization/scientific/program committee of 245 conference held in 54 different countries. His research has been sponsored by 20 different organizations, including government funding agencies such as the National Science Foundation, US Air Force Dynamics Laboratory, and US Army Construction Engineering Research Laboratory.

Table of Contents

Preface	xiii
Acknowledgment	xv
About the Authors	xvii
Introduction	1	(10)
Active Control of Structures	3	(1)
Actuators	3	(4)
Overview of Chapters	7	(4)
Microtasking, Macrotasking, and Autotasking	11	(32)
Introduction	13	(1)
Computing Environment	14	(1)
Vectorization	14	(1)
Multitasking	15	(1)
Macrotasking	15	(1)
Microtasking	15	(1)
Autotasking	15	(1)
Concurrent Processing Issues	16	(1)
Racing Condition	16	(1)
Load Balancing	16	(1)
Combining Vectorization with Microtasking (Stripmining)	17	(1)
Structural Optimization	17	(4)
Storage Schemes for Solution of the Simultaneous Linear Equations	21	(1)
Banded Storage Approach	21	(1)
Sky-line Storage Approach	22	(1)
Multitasking Algorithms	22	(1)
Examples	23	(5)
Speedup Results	28	(12)
Conclusions	40	(3)
Formulation of the Integrated Structural/Control Optimization	43	(20)
Dynamic Control Analysis	45	(5)
Formulation of Integrated Structural and Control Optimization	50	(13)
General	50	(2)
Sensitivities	52	(1)
Nodal Displacement Sensitivities	52	(1)
Closed-loop Eigenvalue Sensitivities	53	(3)
Closed-loop Damping Parameter Sensitivities	56	(1)
Constraints	56	(1)
Nodal Displacement Constraints	56	(3)
Stress Constraints	59	(1)
Closed-loop Eigenvalue Constraints	59	(1)
Closed-loop Damping Parameter Constraints	60	(3)
Parallel Algorithms for Solution of the Eigenvalue Problem	63	(44)
Introduction	65	(1)
Approaches for the Solution of the Complex Eigenvalue Problem	65	(3)
The Method Used in This Research	68	(1)
Parallel-Vector Algorithms	69	(28)
Examples	97	(2)
Example 1	97	(1)
Example 2	98	(1)
Examples 3, 4 and 5	99	(1)
Examples 6	99	(1)
Performance Results	99	(6)
Conclusions	105	(2)
Parallel Algorithms for Solution of the Riccati Equation	107	(28)
Introduction	109	(1)
Approaches for the Solution of the Riccati Equation	110	(5)
The Method Used in This Research	115	(1)
Parallel-Vector Algorithms	116	(9)
Examples	125	(5)
Example 1	125	(1)
Example 2	126	(1)
Example 3	126	(4)
Performance Results	130	(2)
Conclusions	132	(3)
Smart Bridge Structures	135	(36)
Introduction	137	(1)
Response of Controlled Structures	137	(5)
Schemes for Placement of Controllers	142	(9)
Examples	151	(4)
Example 1	154	(1)
Example 2	155	(1)
Example 3	155	(1)
Numerical Results	155	(11)
Conclusions	166	(5)
Smart Multistory Building Structures Under Earthquake and Wind Loadings	171	(32)
Introduction	173	(1)
Schemes for Placement of Controllers	173	(1)
Examples	174	(25)
Example 1	185	(5)
Example 2	190	(1)
Example 3	190	(9)
Conclusions	199	(4)
Smart Building Structures Under Blast Loading	203	(28)
Introduction	205	(1)
Blast Loading	205	(3)
Placement of Controllers	208	(1)
Examples	208	(9)
Example 1	209	(1)
Example 2	209	(8)
Example 3	217	(1)
Results and Discussion	217	(12)
Example 1	217	(6)
Example 2	223	(1)
Example 3	223	(6)
Conclusions	229	(2)
Simultaneous Optimization of Control System and Structure	231	(22)
Introduction	233	(1)
Parallel Algorithms	234	(1)
Examples	234	(7)
Example 1	239	(1)
Example 2	240	(1)
Example 3	240	(1)
Results	241	(7)
Example 1	241	(2)
Example 2	243	(3)
Example 3	246	(2)
Memory and CPU Requirements	248	(3)
Final Comments	251	(2)
Bibliography	253	(10)
Subject Index	263