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Repair and strengthening of LVL beams with carbon FRP

2012-10-12T03:36:34Z

Repair and strengthening of LVL beams with carbon FRP Tat T; Samali Bijan; Shrestha Rijun Sam Fragomeni, Srikanth Venkatesan, Nelson T.K. Lam, Sujeeva Setunge Existing timber structures may require repair or strengthening due to reasons such as age-related deterioration, damage caused by overloading, design deficiencies due to changes in design codes and increases in loading due to functional changes. Fibre reinforced polymer (FRP) composites feature properties which make them ideal for repair and strengthening purposes, Past research has focused on the use ofFRP on timber primarily for strengthening purposes, Less emphasis has been placed on the use ofFRP to repair damaged timber members. This paper presents the results from a preliminary investigation on laminated veneer lumber (LVL) beams either repaired or strengthened with carbon FRP. The test results indicated that FRP strengthening allowed the repaired specimens to recover up to 68% of their original strength, while the strengthened specimen showed an improvement in ductility.

A cost-effective design approach for integrated positioning system

2012-10-12T03:36:34Z

A cost-effective design approach for integrated positioning system Kong Xiaoying; Liu Li; Lowe David Marzuki Khalid Proceeding Web site: http://www.proceedings.com/11642.html IEEE site: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5771302

Finite element evaluation of non-destructive testing methods for embedded timber poles in service

2012-10-12T03:36:34Z

Finite element evaluation of non-destructive testing methods for embedded timber poles in service Zad Amir; Li Jianchun; Samali Bijan; Crews Keith Sam Fragomeni, Srikanth Venkatesan, Nelson T.K. Lam, Sujeeva Setunge This paper presents the results of numerical evaluation of surface Non-Destructive Testing methods for embedded timber poles in service. Main objective of the study is to investigate the influence offactors such as different boundary conditions, geotechnical conditions and material defects and imperfections of embedded timber poles, on reliability and accuracy of the prediction or evaluation using surface NDT. Firstly, the numerical evaluation ofa free-end timber pole without embedment was conducted to gain an understanding of the behaviour of stress waves in timber poles in relation to selected surface NDT methods. Then the embedded timber poles are modelled to include effects of geotechnical conditions as in-service poles. Two types of typical decay patterns are simulated to study the effect of defect/damage on the Non-Destructive Testing results. Finally, the numerical results are compared with field test results obtained from field testing in Victoria.

Design of a Micro-Probe For Direct Measurement of Convection Heat Transfer on a Vertical

2012-10-12T03:36:34Z

Design of a Micro-Probe For Direct Measurement of Convection Heat Transfer on a Vertical Madadnia Jafar; Dehestani Davood; Mehta A.; Koosha Homa Batra, R; Qian, L; He, Y; Li, X; Zhou, D; Dresig, H; Morita, Y; Chuah, K; A proximity probe with two k-type thermocouples, 1.5 mm apart, was designed, built to simultaneously measure local surface and air temperatures on the PV and to quantify local convention heat transfer coefficient. Experimental investigations of natural convection on a vertical photovoltaic (PV) panel exposed to solar radiations are presented. The variation of non-isothermal surface temperature of a PV is expressed with a second-order polynomial relation. In the absence of any correlation to predict the natural convection heat transfer coefficient on a PV, experimental results are presented in the form of variations of the local Nusselt numbers (Nuz), and the average Nusselt numbers (Nu), with Rayleigh number (Ra). The variations are best expressed with a power law correlation form of Nu=a*(Ra)^b for the range 10^6