電子廠機台防震 SEMI S2/S8
 
The forces should be considered acting on the equipment’s center of gravity.
Minimum Anticipated Seismic Forces —The anticipated seismic forces should be at least the following. 
For equipment containing hazardous production materials (HPMs), a horizontal force equal to loading of 94% of the weight of the equipment.
For equipment not containing HPMs,a horizontal force equal to 63% of the weight of the equipment
A vertical force equal to 15% of the weight of the equipment acting upward or downward 
(i.e., a net force on the equipment center of gravity of .85W upward or 1.15W downward) 
Horizontal loads may be calculated independently on the X and Y axes.
NOTE : Because equipment may be placed into service anywhere in the world, it is recommended that the seismic protection design of the equipment be based upon requirements that allow the equipment, as designed, to be installed in most sites worldwide.

 

樓板安全分析鑑定方法 

(公寓 集合住宅 廠房 華廈 隔間變更 室內裝修變更)

利用有限元素分析進行樓板安全檢核:

分析結果 常用參數如下

For shell element internal forces, the possible components are as follows:

  • F11: Direct force per unit length acting at the mid-surface of the element on the positive and negative 1 faces in the 1-axis direction.
  • F22: Direct force per unit length acting at the mid-surface of the element on the positive and negative 2 faces in the 2-axis direction.
  • F12: Shearing force per unit length acting at the mid-surface of the element on the positive and negative 1 faces in the 2-axis direction, and acting on the positive and negative 2 faces in the 1-axis direction.
  • FMax: Maximum principal force per unit length acting at the mid-surface of the element. Note that by definition principal forces are oriented such that the associated shearing force per unit length is zero.
  • FMin: Minimum principal force per unit length acting at the mid-surface of the element. Note that by definition principal forces are oriented such that the associated shearing force per unit length is zero.
  • FVM:   Von Mises principal force per unit length acting at the mid-surface of the element.
  • V13: Out-of-plane shear per unit length acting at the mid-surface of the element on the positive and negative 1 faces in the 3-axis direction.
  • V23: Out-of-plane shear per unit length acting at the mid-surface of the element on the positive and negative 2 faces in the 3-axis direction.
  • VMax: Maximum principal shear per unit length acting at the mid-surface of the element. Note that by definition principal shears are oriented on faces of the element such that the associated shears per unit length on perpendicular faces are zero.
  • M11: Direct moment per unit length acting at the mid-surface of the element on the positive and negative 1 faces about the 2-axis.
  • M22: Direct moment per unit length acting at the mid-surface of the element on the positive and negative 2 faces about the 1-axis.
  • M12: Twisting moment per unit length acting at the mid-surface of the element on the positive and negative 1 faces about the 1-axis, and acting on the positive and negative 2 faces about the 2-axis.
  • MMax: Maximum principal moment per unit length acting at the mid-surface of the element. Note that by definition principal moments are oriented such that the associated twisting moment per unit length is zero.
  • MMin: Minimum principal moment per unit length acting at the mid-surface of the element. Note that by definition principal moments are oriented such that the associated twisting moment per unit length is zero.

 

 

 

 

   https://liangtai7class.wordpress.com/

Structural Analysis 
8th - R.C. Hibbeler

相當不錯的英文教學

 

可選取字幕,英文教學,

教學內容取材自 R. C. Hibbeler 結構學

**本線上教育blog是一個為非營利目地之分享平臺

 
Structural Analysis 8th - R.C. Hibbeler