scholarly journals SIMPLE ANALYSIS MODEL FOR EXPOSED COLUMN-BASE CONSIDERING EFFECT OF INITIAL TENSIONING OF ANCHOR BOLTS AND COLUMN AXIAL FORCE

2008 ◽  
Vol 73 (628) ◽  
pp. 991-997 ◽  
Author(s):  
Hiroyuki TAMAI ◽  
Teruaki YAMANISHI ◽  
Tsuyoshi SHIRAKI ◽  
Takao TAKAMATSU ◽  
Akira MATSUO
Keyword(s):  
Axial Force ◽  
Analysis Model ◽  
Simple Analysis ◽  
Anchor Bolts ◽  
Column Base

scholarly journals A STUDY ON ANCHOR-BOLT-YIELD-TYPE EXPOSED COLUMN-BASE WITH MULTI-ROWS OF ANCHOR-BOLTS SUBJECTED TO VARIABLE AXIAL-FORCE AND BENDING

2011 ◽  
Vol 76 (660) ◽  
pp. 397-405 ◽  
Author(s):  
Teruaki YAMANISHI ◽  
Takao TAKAMATSU ◽  
Hiroyuki TAMAI ◽  
Kiichirou SAWADA ◽  
Akira MATSUO
Keyword(s):  
Axial Force ◽  
Anchor Bolt ◽  
Anchor Bolts ◽  
Column Base

Behavior of exposed column-base connections with four internal anchor bolts under seismic loading

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 105-119
Author(s):  
Jianrong Pan ◽  
Ruike Huang ◽  
Jing Xu ◽  
Peng Wang ◽  
Zhan Wang ◽  
...  
Keyword(s):  
Seismic Loading ◽  
Anchor Bolts ◽  
Base Connections ◽  
Column Base

Optimal Offloading Configuration of Spread-Moored FPSOs

2009 ◽  
Vol 131 (2) ◽  
Author(s):  
Steven M. Wilkerson ◽  
Satish Nagarajaiah
Keyword(s):  
Environmental Conditions ◽  
Main Tool ◽  
Design Parameters ◽  
Optimization Approach ◽  
Analysis Model ◽  
Simple Analysis ◽  
Formal Approach ◽  
Fine Tune ◽  
Formal Optimization ◽  
Selection Of

As the oil offloading operations of floating production storage and offloading (FPSO) units become more routine, the desire grows to increase the availability for offloading and thus decrease production downtime. Experience with these operations is the main tool available to increase the efficiency of this aspect of deepwater production. However, it is clear that a formal optimization approach can help to fine tune design parameters so that not only is availability increased but the significance of each design parameter can be better understood. The key issue is to define the environmental conditions under which the vessels involved in offloading are able to maintain position. By this, we reduce the notion of availability to a set of operating criteria, which can or cannot be met for a particular set of environmental conditions. The actual operating criteria such as relative vessel heading depend on selection of design parameters, such as the direction and magnitude of external force applied by thrusters or tugs. In the earliest offloading operations, engineering judgment was used to determine the feasibility of offloading at a particular time. For example, if wind and current were not expected to exceed a 1year return period, offloading may be considered safe. This approach can be both conservative and unconservative, depending on the nuances of the particular environmental conditions. This study will propose a formal approach to choosing the design parameters that optimize the availability of a FPSO for offloading. A simple analysis model will be employed so that optimization can be performed quickly using a robust second order method. The proposed analysis model will be compared to model test data to demonstrate its agreement with the more complex system.

Influence of Axial Force and Initial Curvature on the Flexural Deflection of Euler-Bernoulli Beam Structures Solved by DQEM Using EDQ

2006 ◽  
Author(s):  
Chang-New Chen
Keyword(s):  
Axial Force ◽  
Offshore Structures ◽  
Differential Quadrature ◽  
Analysis Model ◽  
Bernoulli Beam ◽  
Beam Structures ◽  
Initial Curvature ◽  
Differential Quadrature Element Method ◽  
Governing Differential Equation ◽  
Euler Bernoulli Beam

The influence of axial force and initial curvature on the flexural deflection of Euler-Bernoulli beam structures is analyzed by differential quadrature element method (DQEM) using extended differential quadrature (EDQ). The DQEM uses the differential quadrature to discretize the governing differential equation defined on each element, the transition conditions defined on the inter-element boundary of two adjacent elements and the boundary conditions of the beam. Numerical results solved by the developed numerical algorithm are presented. The convergence of the developed DQEM analysis model is efficient. The theory presented in the paper can be used to effectively obtain accurate results in analyzing the offshore structures.

Influence of Axial Force on the Vibration of Euler-Bernoulli Beam Structures Solved by DQEM Using EDQ

2006 ◽  
Author(s):  
Chang-New Chen
Keyword(s):  
Boundary Conditions ◽  
Axial Force ◽  
Differential Quadrature ◽  
Analysis Model ◽  
Bernoulli Beam ◽  
Beam Structures ◽  
Differential Quadrature Element Method ◽  
Quadrature Element Method ◽  
Euler Bernoulli Beam ◽  
Element Boundary

The influence of axial force on the vibration of Euler-Bernoulli beam structures is analyzed by differential quadrature element method (DQEM) using extended differential quadrature (EDQ). The DQEM uses the differential quadrature to discretize the governing differential eigenvalue equation defined on each element, the transition conditions defined on the inter-element boundary of two adjacent elements and the boundary conditions of the beam. Numerical results solved by the developed numerical algorithm are presented. The convergence of the developed DQEM analysis model is efficient.

D-5 Study of Conversion Method of Simple Analysis Model for Rotary Stepper Micromotor

2010 ◽  
Vol 2010 (0) ◽  
pp. 197-198
Author(s):  
Junji SONE ◽  
Toshinari MIZUMA ◽  
Shunsuke MOCHIZUKI ◽  
Edin SARAJIC ◽  
Christophe YAMAHATA ◽  
...  
Keyword(s):  
Analysis Model ◽  
Simple Analysis ◽  
Conversion Method
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