it is well known that damaged structural members may alter the behaviour of the structures considerably. careful observation of these changes has often been viewed as a means to identify and assess the location and severity of damages in structures. among the responses of a structure, natural frequencies and natural modes are both relatively easy to obtain and independent from external excitati...

The ideal aim of treatment in rheumatoid arthritis (RA) is to suppress synovial inflammation and to stop or reduce structural joint damage progression. To evaluate joint damage in RA, radiographic assessment of hands and feet is the traditional method. Nevertheless, plain film radiography can only evaluate bone damage (erosion) and, indirectly, joint cartilage. Magnetic resonance imaging presen...

building pounding occurs between two adjacent buildings with small gap or without sufficient separation distance. it leads to damage buildings during earthquake due to impact. many researchers have investigated building pounding based on impact force reduction and energy dissipation increase, when two buildings collide with each other. in numerical investigations, using specific link element, i...

Distributed Sensor Networks (DSN) has emerged as a sensing paradigms in the structural egineering field due to the application of Structural Health Monitoring (SHM) for large-scale structures which results in accurately diagnosing the health of structures and enhancing the re liability and robustness of monitoring systems. The multisensor network greatly enhances the feasibility of applying SHM...

A signal-based pattern-recognition approach is used for structural damage diagnosis with a single or limited number of input/output signals. The approach is based on extraction of the features of the structural response that present a unique pattern for each specific damage case. In this study, frequency-based features and time-frequency-based features were extracted from measured vibration sig...