scholarly journals ACTUAL MASS AND STIFFNESS ESTIMATION OF A REINFORCED CONCRETE BUILDING BASED ON ITS RESONANT FREQUENCY SHIFT DUE TO A DEFINITE ADDED MASS

2002 ◽  
Vol 67 (559) ◽  
pp. 93-100 ◽  
Author(s):  
Hirohito MORI ◽  
Hiroshi KAWASE
Keyword(s):  
Reinforced Concrete ◽  
Resonant Frequency ◽  
Frequency Shift ◽  
Added Mass ◽  
Reinforced Concrete Building ◽  
Resonant Frequency Shift ◽  
Concrete Building ◽  
Actual Mass

Doubly-Clamped Single Walled Boron Nitride Nanotube Based Nanomechanical Resonators: A Computational Investigation of Their Behavior

2012 ◽  
Vol 3 (4) ◽  
Author(s):  
Mitesh B. Panchal ◽  
S. H. Upadhyay
Keyword(s):  
Finite Element ◽  
Boron Nitride ◽  
Resonant Frequency ◽  
Frequency Shift ◽  
Dynamic Behavior ◽  
Added Mass ◽  
Boron Nitride Nanotube ◽  
Landing Position ◽  
Nanomechanical Resonators ◽  
Resonant Frequency Shift

This paper illustrates the dynamic behavior of a doubly-clamped single walled boron nitride nanotube (SWBNNT) as a mass sensor. To this end, a 3-dimensional atomistic model based on molecular structural mechanics is developed such that the proximity of the model to the actual atomic structure of the nanotube is significantly retained. Different types of zigzag and armchair layouts of SWBNNTs are considered with doubly-clamped end constraints. Implementing the finite element simulation approach, the resonant frequency shift based analysis is performed for doubly-clamped end-constraints, for an additional nanoscale mass at the middle of the length, and at the intermediate landing position along the length of the nanotube. The effect of the intermediate landing position of added mass on the resonant frequency shift is analyzed by considering excitations of the fundamental modes of vibration. The finite element method (FEM) based simulation results are validated using the continuum mechanics based analytical results, considering the effective wall thickness of the SWBNNT. The present approach is found to be effectual in terms of dealing with different chiralities, boundary conditions, and the consideration of the added mass to analyze the dynamic behavior of the doubly-clamped SWBNNT based nanomechanical resonators.

Immersion‐Angle Dependence of the Resonant‐Frequency Shift of a Quartz Crystal Microbalance in Three Types of Newtonian Liquids

2007 ◽  
Vol 35 (5) ◽  
pp. 495-505
Author(s):  
Minoru Yoshimoto ◽  
Satoshi Kobirata ◽  
Wataru Sakamoto ◽  
Hidenobu Aizawa ◽  
Shigeru Kurosawa
Keyword(s):  
Resonant Frequency ◽  
Frequency Shift ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Angle Dependence ◽  
Resonant Frequency Shift ◽  
Newtonian Liquids

Soft storey effects on plastic hinge propagation of moment resisting reinforced concrete building subjected to Ranau earthquake

2017 ◽  
Author(s):  
Chee Ghuan Tan ◽  
Wei Ting Chia ◽  
Taksiah A. Majid ◽  
Fadzli Mohamed Nazri ◽  
Mohd Irwan Adiyanto
Keyword(s):  
Reinforced Concrete ◽  
Plastic Hinge ◽  
Reinforced Concrete Building ◽  
Soft Storey ◽  
Concrete Building ◽  
Moment Resisting
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