Calculation method of ultimate curvature of rc and src section based on analytical model for axial reinforcement buckling and its application to ductility evaluation of these columns.

The calculation method of the minimum aperture of transverse joints with spherical surface key groove was introduced in this study. Based on the computation theory of allowable height difference between adjacent monoliths proposed by Bofang Zhu, the analytical model of allowable height difference of Xiluodu arch dam was established with consideration of the effect of main factors on the transverse joints deformation, including the temperature, autogenous volume deformation, self-weight and foundation. After the horizontal and vertical deformations of transverse joints was required, according to the form of spherical surface key groove, the aperture of each part of key groove and the minimum aperture were obtained at several height difference between adjacent monoliths. The allowable height difference was determined on the condition of meeting the grouting requirements of transverse joints. The result shows that the allowable height difference for Xiluodu arch dam should not be more than 30m.

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Research on the Calculation Method of Tightening Torque on P-110S Threaded Connections

Journal of Pressure Vessel Technology ◽

10.1115/1.4003464 ◽

2011 ◽

Vol 133 (5) ◽

Cited By ~ 2

Author(s):

Shou-Jun Chen ◽

Qi An ◽

Yi Zhang ◽

Qiang Li

Keyword(s):

Analytical Model ◽

Calculation Method ◽

Geometric Parameters ◽

New Method ◽

Frictional Torque ◽

Element Analysis ◽

Tightening Torque ◽

Threaded Connection ◽

Threaded Connections ◽

Elastic Mechanics

Tightening torque is one of the main factors that could affect the connection quality in threaded connections. On the basis of elastic mechanics and thick cylinder theory, this paper established a new analytical model based on the geometric parameters of thread tooth and the calculation method of tightening torque on P-110S threaded connections was also obtained by calculating the frictional torque on each threaded surface. In this paper, the friction coefficient on the real contact thread tooth was measured by the developed experimental equipment that could be used to simulate the contact of threaded surfaces approximately. By applying the new method on P-110S threaded connection and comparing the results obtained by analytical model with the true make-up torque in application, it could be found that the analytical model and the calculation method proposed in this paper are reasonable. The new method was also validated by using the finite element analysis method to the same sample. The new method proposed in this paper is practical and convenient because it can be applied to calculate the tightening torque just with geometric parameters and thread numbers, which is easier to implement in application.

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Simulation on Bond Behavior of RC Beams Strengthened with FRP

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.193-194.1148 ◽

2012 ◽

Vol 193-194 ◽

pp. 1148-1151 ◽

Cited By ~ 1

Author(s):

Xin Yan Lin ◽

Hai Ping Meng

Keyword(s):

Theoretical Calculation ◽

Analytical Model ◽

Calculation Method ◽

Experimental Result ◽

Rc Beams ◽

Test Results ◽

Bond Behavior ◽

Key Factor ◽

Concrete Interface ◽

Key Parameter

The bond behavior on the FRP-concrete interface is a key factor to affect the behavior of members strengthened with FRP. In this paper, an analytical model to simulate the bond behavior on FRP-concrete interface between two adjacent cracks is derived; furthermore, the calculation method of the steel strain at the crack which is the key parameter in this model is given. Comparison between experimental result and theoretical calculation on FRP stain distribution in beam indicates that the analytical model can well predict the test results.

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Calculation Method for Rocking Die Motion Track in Cold Orbital Forging

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4030855 ◽

2015 ◽

Vol 138 (1) ◽

Cited By ~ 4

Author(s):

Xinghui Han ◽

Xinchang Zhang ◽

Lin Hua

Keyword(s):

Experimental Study ◽

Case Studies ◽

Analytical Model ◽

Calculation Method ◽

Universal Motion ◽

Orbital Forging ◽

Geometry And Kinematics

In cold orbital forging, the rocking die performs complex motions on the components and the intervention between them cannot emerge, otherwise the components cannot be shaped successfully. Calculating the rocking die motion track is essential to determining whether there is intervention between the rocking die and components. Thus, this study aims to comprehensively investigate the rocking die motion track in cold orbital forging. For this purpose, an analytical model for calculating the rocking die motion track is first established. Then a universal motion track equation that can denote any geometry and kinematics relationships between the rocking die and components is obtained using this analytical model. To verify the validity of this motion track equation, an experimental study is conducted. The result shows that the calculated rocking die motion track is consistent with the experimental one. According to this valid motion track equation, the characteristics of the rocking die motion track are revealed. Finally, to apply the calculated rocking die motion track for analyzing the intervention between the rocking die and components, two case studies are examined.

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