Moment–rotation curve characteristics and initial rotational stiffness calculation method of angle connections

2021 ◽  
Author(s):  
Jiangui Qin ◽  
Zhan Wang ◽  
Jianrong Pan ◽  
Bin Li ◽  
Yanjing Fan
Keyword(s):  
Calculation Method ◽  
Rotation Curve ◽  
Rotational Stiffness

Influence of Rotational Stiffness on the Distribution of Horizontal Forces on All-Vertical-Pile-Supported Wharf Structures

2013 ◽  
Vol 405-408 ◽  
pp. 1453-1457
Author(s):  
Gui Lan Tao ◽  
Si Yuan Dong
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Calculation Method ◽  
Distribution Coefficients ◽  
Length Ratio ◽  
Force Distribution ◽  
Horizontal Force ◽  
Maximum Difference ◽  
Rotational Stiffness ◽  
Beam Method

A calculation method of rotational stiffness of all-vertical-pile-supported (AVPS) wharf is discussed and a formula based on rotational stiffness is derived to evaluate the distribution of horizontal forces on an AVPS wharf. Combining with an engineering example, the rotational stiffness and the horizontal force distribution coefficients were calculated utilizing finite element method (FEM), the elastic support-rigid beam method (ESRBM) outlined in Chinese Harbor Code, as well as the proposed formula for the piles layout width-length ratio of 0.4, 0.5 and 0.6. Results indicate that the increase in width-length ratio will increase the rotational stiffness and make the distribution of horizontal forces on each bent to be more uniform. Results calculated by the proposed formula are agree well with the results by FEM. The maximum difference of the distribution coefficient on the first bent between the results obtained by the proposed formula and by ESRBM is approximately 22%.

scholarly journals Influence of Rotational Stiffness Modeling on the Joint Behavior of Quasi-Rectangular Shield Tunnel Linings

2020 ◽  
Vol 10 (23) ◽  
pp. 8396 ◽  
Author(s):  
Weixi Zhang ◽  
Wouter De Corte ◽  
Xian Liu ◽  
Luc Taerwe
Keyword(s):  
Axial Force ◽  
Calculation Method ◽  
Bending Moment ◽  
Design Parameters ◽  
Shield Tunnel ◽  
Rotational Stiffness ◽  
Circular Tunnel ◽  
Constant Stiffness ◽  
Specific Geometry ◽  
Nonlinear Deformations

A beam-spring model with constant rotational stiffness is a practical tool for the prediction of the general deformations and bending moments in circular tunnel linings. However, in reality, the rotational stiffness of a segmental joint is not constant, due to nonlinear deformations and local yielding in the vicinity of the joint. These are a result of the specific geometry at the joint, which is related to water-tightness measures and buildability issues. For quasi-rectangular tunnels this nonlinearity should not be neglected, as the bending component in the lining is significantly larger compared to circular linings. To date, there are only few studies that have investigated a calculation method for consideration of the joint’s nonlinear moment-axial force and shear-axial force interaction behavior and its consequences on the calculated lining behavior. In this paper, an iterative incremental method is proposed to tackle this issue, based on rotational stiffness curves derived from 3D nonlinear finite element modelling of the joints, and substantiated by testing. The significance of the variable rotational stiffness is highlighted through a comparison with results based on a constant stiffness assumption. Further, using the proposed calculation method, the effects of the circumferential joints, the bending moment transmission and several other parameters on the full-ring behavior of quasi-rectangular tunnels are discussed for a wide interval of design parameters. The results provide some new insights into the behavior of this non-traditional tunnel type. Although the presented results are related to specific overall and local geometries, the presented method is considered to be useful for the design of other special tunnel geometries.

The Calculation Method for Moment-Rotation Curve of T-Beam Joints in Semi-Rigid Connections

2014 ◽  
Vol 578-579 ◽  
pp. 201-209
Author(s):  
Wei Liu ◽  
Xiong Zhang
Keyword(s):  
Finite Element ◽  
Calculation Method ◽  
Rotation Curve ◽  
Steel Structure ◽  
Structure Design ◽  
Design Code ◽  
Steel Connection ◽  
Engineering Steel ◽  
The Moment ◽  
T Beam

Reference to the proposed research results and abroad specification, T-beam connection is widely used in engineering steel connection. Comparing with the finite element result, it has been verified that this method can effectively calculate the moment-rotation curve. So it can be a beneficial supplement to the steel structure design code of the T-beam connections.

Back-Calculation Method of Subgrade Modulus Based on Traffic Speed Deflectometer

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Guoshuai Zang ◽  
Haizhu Lu ◽  
Guanglai Jin ◽  
Zhixiang Zhang
Keyword(s):  
Calculation Method ◽  
Back Calculation ◽  
Subgrade Modulus ◽  
Traffic Speed

Analysis of Heart Rate Variability During Breath-Holding Using Fast and Continuous Calculation Method of Frequency and Power

2009 ◽  
Vol 129 (1) ◽  
pp. 1-7
Author(s):  
Yutaka Yoshida ◽  
Kiyoko Yokoyama ◽  
Naohiro Ishii
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Calculation Method ◽  
Breath Holding

A Novel Power Loss Calculation Method for Power Magnetic Components in Power Converters

2021 ◽  
Vol 141 (1) ◽  
pp. 69-75
Author(s):  
Yuki Ishikura ◽  
Tatsuya Hosotani ◽  
Masayoshi Yamamoto
Keyword(s):  
Calculation Method ◽  
Power Loss ◽  
Power Converters ◽  
Loss Calculation ◽  
Magnetic Components

A Calculation Method of Induction Heating Processes in Magnetic Metals

2011 ◽  
Vol 131 (10) ◽  
pp. 838-845 ◽  
Author(s):  
Shuji Obata
Keyword(s):  
Induction Heating ◽  
Calculation Method

Unified Calculation Method for Motor Torque in Reluctance Network Analysis

2015 ◽  
Vol 135 (11) ◽  
pp. 1063-1069
Author(s):  
Kenji Nakamura ◽  
Osamu Ichinokura
Keyword(s):  
Network Analysis ◽  
Calculation Method ◽  
Motor Torque ◽  
Reluctance Network

Development and Evaluation of a Fast Voltage Calculation Method for Low-Voltage Distribution System

2013 ◽  
Vol 133 (4) ◽  
pp. 343-349
Author(s):  
Shunsuke Kawano ◽  
Yasuhiro Hayashi ◽  
Nobuhiko Itaya ◽  
Tomihiro Takano ◽  
Tetsufumi Ono
Keyword(s):  
Calculation Method ◽  
Distribution System ◽  
Low Voltage ◽  
Voltage Distribution
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