

 SAP2000 v14.2.4 Advanced (Analysis Build 8860/32)
 File: C:\Users\Mustapha\Desktop\Truss\Truss.LOG




 B E G I N   A N A L Y S I S                                2013/02/24  20:41:51


 RUNNING ANALYSIS WITHIN THE GUI PROCESS
 USING THE ADVANCED SOLVER (PROVIDES LIMITED INSTABILITY INFORMATION)


 E L E M E N T   F O R M A T I O N                                      20:41:51



 L I N E A R   E Q U A T I O N   S O L U T I O N                        20:41:51

 FORMING STIFFNESS AT ZERO (UNSTRESSED) INITIAL CONDITIONS

 TOTAL NUMBER OF EQUILIBRIUM EQUATIONS     =          74
 NUMBER OF NON-ZERO STIFFNESS TERMS        =         551

 NUMBER OF EIGENVALUES BELOW SHIFT         =           0


 L I N E A R   S T A T I C   C A S E S                                  20:41:51

 USING STIFFNESS AT ZERO (UNSTRESSED) INITIAL CONDITIONS

 TOTAL NUMBER OF CASES TO SOLVE            =           3
 NUMBER OF CASES TO SOLVE PER BLOCK        =           3

 LINEAR STATIC CASES TO BE SOLVED:

 CASE: DEAD
 CASE: SNOW
 CASE: WINDX


 E I G E N   M O D A L   A N A L Y S I S                                20:41:51

 CASE: MODAL

 USING STIFFNESS AT ZERO (UNSTRESSED) INITIAL CONDITIONS

 NUMBER OF STIFFNESS DEGREES OF FREEDOM    =          74
 NUMBER OF MASS DEGREES OF FREEDOM         =          48
 MAXIMUM NUMBER OF EIGEN MODES SOUGHT      =          12
 MINIMUM NUMBER OF EIGEN MODES SOUGHT      =           1
 NUMBER OF RESIDUAL-MASS MODES SOUGHT      =           0
 NUMBER OF SUBSPACE VECTORS USED           =          24
 RELATIVE CONVERGENCE TOLERANCE            =    1.00E-09

 FREQUENCY SHIFT  (CENTER) (CYC/TIME)      =     .000000
 FREQUENCY CUTOFF (RADIUS) (CYC/TIME)      =  -INFINITY-
 ALLOW AUTOMATIC FREQUENCY SHIFTING        =         YES


 Original stiffness at shift : EV= 0.0000000E+00, f=     .000000, T=  -INFINITY-
 Number of eigenvalues below shift =      0
 Found mode      1 of     12:  EV= 3.3433100E+04, f=   29.101036, T=    0.034363
 Found mode      2 of     12:  EV= 1.6432324E+05, f=   64.516326, T=    0.015500
 Found mode      3 of     12:  EV= 4.1672696E+05, f=  102.741507, T=    0.009733
 Found mode      4 of     12:  EV= 6.9862262E+05, f=  133.027507, T=    0.007517
 Found mode      5 of     12:  EV= 8.8771244E+05, f=  149.953389, T=    0.006669
 Found mode      6 of     12:  EV= 1.2586909E+06, f=  178.558152, T=    0.005600
 Found mode      7 of     12:  EV= 1.7725423E+06, f=  211.893888, T=    0.004719
 Found mode      8 of     12:  EV= 2.0286720E+06, f=  226.686702, T=    0.004411
 Found mode      9 of     12:  EV= 2.0409921E+06, f=  227.373996, T=    0.004398
 Found mode     10 of     12:  EV= 2.5193843E+06, f=  252.619774, T=    0.003959
 Found mode     11 of     12:  EV= 3.4455863E+06, f=  295.428028, T=    0.003385
 Found mode     12 of     12:  EV= 3.8539508E+06, f=  312.444739, T=    0.003201

 NUMBER OF EIGEN MODES FOUND               =          12
 NUMBER OF ITERATIONS PERFORMED            =           9
 NUMBER OF STIFFNESS SHIFTS                =           0


 A N A L Y S I S   C O M P L E T E                          2013/02/24  20:41:51
