free vibration - reg

Sir, 

The steel structure model is checked for seismic loads with the site specific spectra . I am checking the qualification of structure w.r.t to stresses and deflection . 

Clarification : 

Whether i need to check the natural frequency of structure (I have attached the Site spectra used for analysis).

 

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 11-Nov-21
END JOB INFORMATION
INPUT WIDTH 79
UNIT MMS NEWTON
JOINT COORDINATES
1 0 0 0; 2 0 1160 0; 3 0 175 0; 4 0 175 785; 5 0 175 375; 6 640 175 375;
7 520 175 375; 9 520 -110 375; 10 260 175 375; 11 0 675 0;
MEMBER INCIDENCES
1 1 3; 2 3 11; 3 3 5; 4 5 4; 5 5 10; 6 7 6; 7 7 9; 8 10 7; 9 10 3; 12 11 2;
13 11 5;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 205000
POISSON 0.3
DENSITY 7.68195e-005
ALPHA 1.2e-005
DAMP 0.03
TYPE STEEL
STRENGTH FY 253.2 FU 407.8 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY INDIAN
1 TO 8 12 13 TABLE FR ISMC150
9 TABLE FR ISMC100
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
2 FIXED
LOAD 1 LOADTYPE Dead  TITLE DL
SELFWEIGHT Y -1 
JOINT LOAD
9 FY -150
LOAD 3 LOADTYPE Live  TITLE SL(SSE)
JOINT LOAD
9 FY 1418
LOAD 5 LOADTYPE Live  TITLE SL(SSE)WITH -VE
JOINT LOAD
9 FY -1418
LOAD 9 LOADTYPE Seismic  TITLE EQX(SSE)
SELFWEIGHT X 1 
SELFWEIGHT Y 1 
SELFWEIGHT Z 1 
SPECTRUM SRSS X 1 ACC DAMP 0 LIN MIS 0
20 1193.6; 4 1193.6; 2.85714 1422.3; 2.5 1617.9; 2.22222 1945.8; 2 2181;
1.66667 2367.2; 1.53846 2513.4; 1.42857 2807.3; 1.25 2962.9; 1.17647 3193.4;
1.05263 3375.2; 0.869565 3375.2; 0.8 3487.7; 0.740741 3788.5; 0.714286 3788.5;
0.666667 3937.6; 0.645161 4265.7; 0.625 4432; 0.588235 4446.4; 0.555556 4674;
0.540541 4901.6; 0.487805 5927.8; 0.465116 5927.8; 0.444444 6193.5;
0.425532 6893.2;
0.416667 7599.6; 0.4 8312.6; 0.294118 8312.6; 0.285714 7493.5; 0.28169 7185.4;
0.232558 6855; 0.227273 7209.7; 0.212766 7242.9; 0.206186 7611.2; 
0.20202 7701.7;
0.19802 7727.5; 0.192308 7938.9; 0.190476 8289.1; 0.185185 8800.3; 
0.181818 9054.8;
0.18018 9208.7; 0.178571 9235.4; 0.131579 9235.4; 0.12987 9145.6; 
0.128205 8932.1;
0.127389 8875.1; 0.125786 9058.5; 0.125 9090.6; 0.0925926 9090.6;
0.0909091 8988.7;
0.0892857 8742; 0.0877193 8677.2; 0.0869565 8552.8; 0.0865801 8520; 
0.0858369 8310.4;
0.0854701 8226.8; 0.0851064 8185.5; 0.0840336 7979.7; 0.08 8028.7; 
0.0591716 8028.7;
0.0588235 7505.1; 0.058651 7287.5; 0.0584795 7158.5; 0.058309 7053.6;
0.0571429 6723.1; 0.0560224 6460.8; 0.0554017 6298.8; 0.0550964 5902.6;
0.0549451 5732.7; 0.0544959 5376; 0.0526316 5184.1; 0.052356 4879.1;
0.0522193 4747.8; 0.0520833 4659.1; 0.0508906 4627; 0.0502513 4422.2;
0.0496278 4354.4; 0.0486618 4065.1; 0.0465116 3813.5; 0.0433839 3274.8;
0.04329 3216.5; 0.0357782 2795.6; 0.0322061 2795.6; 0.030303 2624;
LOAD 10 LOADTYPE Seismic  TITLE EQY(SSE)
SPECTRUM SRSS Y 0.67 ACC DAMP 0 LIN MIS 0
20 797.5; 4 797.5; 2.85714 948.8; 2.5 1078.2; 2.22222 1291.6; 2 1444.2;
1.66667 1568.4; 1.53846 1666.5; 1.42857 1878.8; 1.25 1960.3; 1.17647 2118.6;
1.05263 2272.7; 0.869565 2272.7; 0.8 2331.9; 0.769231 2391.1; 0.740741 2521.8;
0.714286 2521.8; 0.666667 2542; 0.645161 2744.7; 0.625 2849.3; 0.588235 2849.8;
0.555556 2969.2; 0.540541 3088.5; 0.487805 4043.3; 0.47619 4256.4; 
0.454545 4469.6;
0.425532 4903.1; 0.416667 5521.8; 0.4 6470.3; 0.294118 6470.3; 0.28169 6284.8;
0.25974 6950; 0.253165 7038.8; 0.243902 7282.6; 0.238095 7376.2; 
0.212766 7501.6;
0.206186 7857.8; 0.204082 8091.4; 0.20202 8550.9; 0.19802 9002.4; 
0.145985 9002.4;
0.133333 8867.3; 0.131579 9460.2; 0.12987 9611.8; 0.129032 9799.2; 
0.128205 10173.9;
0.127389 10190.2; 0.0938967 10190.2; 0.0930233 10112.9; 0.0913242 9828.1;
0.0843882 8609; 0.0833333 8477.5; 0.0826446 8455; 0.0809717 8455;
0.0803213 8173.3;
0.08 8148; 0.0796813 8097.4; 0.0790514 7849.2; 0.077821 7437.3; 
0.0775194 7371.8;
0.0763359 6818; 0.0757576 6617.4; 0.0740741 6156.8; 0.0735294 5836; 
0.0732601 5704.6;
0.0729927 5630.8; 0.0727273 5589.3; 0.0719424 5581.4; 0.0711744 5581.4;
0.0696864 5485; 0.0687285 5485; 0.0682594 5389.3; 0.0657895 5365.9; 
0.0641026 4983.8;
0.0591716 4610.1; 0.058651 4104.1; 0.0584795 3988.1; 0.058309 3917.2;
0.0581395 3868; 0.0555556 3627; 0.0546448 3627; 0.0508906 3583.2; 
0.0501253 3458.5;
0.0496278 3458.5; 0.0493827 3457.7; 0.0486618 3457.7; 0.0465116 3421.6;
0.0462963 3340.2; 0.0460829 3299.4; 0.0458716 3218; 0.0452489 3147.9;
0.0433839 2743; 0.04329 2659.8; 0.030303 2265.9;
LOAD 11 LOADTYPE Seismic  TITLE EQZ(SSE)
SPECTRUM SRSS Z 1 ACC DAMP 0 LIN MIS 0
20 1197.4; 4 1197.4; 2.85714 1423.8; 2.5 1619.7; 2.22222 1946.8; 2 2184.5;
1.66667 2362; 1.53846 2514.6; 1.42857 2839.1; 1.25 2964.9; 1.17647 3207.6;
1.05263 3414.1; 0.869565 3414.1; 0.8 3536.9; 0.740741 3861.6; 0.714286 3861.6;
0.666667 3972; 0.645161 4218; 0.625 4315.9; 0.588235 4387.7; 0.555556 4637.7;
0.540541 4887.6; 0.487805 5969; 0.454545 6031.5; 0.425532 7171.6; 
0.416667 7883.4;
0.4 8547.1; 0.377358 8579.8; 0.28169 8579.8; 0.277778 8469.1; 0.266667 8320.4;
0.263158 8308.6; 0.25974 8369; 0.253165 8429.4; 0.204082 8432.1; 
0.20202 8597.5;
0.19802 8741.4; 0.192308 8865; 0.190476 9090.3; 0.188679 9202.9;
0.185185 9304.4;
0.181818 9447.1; 0.18018 9574.7; 0.178571 9631.1; 0.148148 9698.9;
0.147059 9843.6;
0.145985 9900.4; 0.137931 9900.4; 0.136054 9960.5; 0.134228 10365; 
0.133333 10603.1;
0.131579 10841.2; 0.129032 11614.9; 0.128205 12104.5; 0.127389 12144.8;
0.125786 12524.2; 0.0930233 12524.2; 0.0925926 12504.7; 0.0917431 12308;
0.0913242 12242.4; 0.0884956 11456.5; 0.0881057 11387.2; 0.0865801 11304.8;
0.0809717 11304.8; 0.0803213 11108.6; 0.08 11059.9; 0.0796813 10962.5;
0.0790514 10579.6; 0.0784314 10257; 0.077821 10010.4; 0.0775194 9921.8;
0.0760456 8986; 0.0757576 8828.6; 0.075188 8656.3; 0.0740741 8472.3;
0.0735294 8142.3; 0.0724638 7722.4; 0.0722022 7647.7; 0.0714286 7529.3;
0.0706714 7523.2; 0.0701754 7523.2; 0.0687285 7514.2; 0.0684932 7410.9;
0.0680272 7311.7; 0.0675676 7311.7; 0.0657895 7259.1; 0.0643087 6630.1;
0.0641026 6575.8; 0.0628931 6131.9; 0.0591716 5937.6; 0.0588235 5312.7;
0.058651 5055.7; 0.0584795 4909.6; 0.058309 4801.3; 0.0554017 4377.1;
0.0544959 4115.3; 0.0526316 4036.5; 0.0520833 3866.1; 0.0508906 3847.4;
0.0502513 3682.8; 0.0433839 3196.9; 0.0431965 3144.1; 0.030303 2692.3;
LOAD COMB 20 LC1(SSE)
1 1.0 9 1.0 3 1.0 
LOAD COMB 21 LC2(SSE)
1 1.0 10 1.0 3 1.0 
LOAD COMB 22 LC3(SSE)
1 1.0 11 1.0 3 1.0 
LOAD COMB SRSS 23 LC4(SSE)
-1 1.0 9 1.0 10 1.0 11 1.0 -3 1.0 1
LOAD COMB 24 LC1(SSE WITH -VE SL)
1 1.0 5 1.0 9 1.0 
LOAD COMB 25 LC2(SSE WITH -VE SL)
1 1.0 5 1.0 10 1.0 
LOAD COMB 26 LC3(SSE WITH -VE SL)
1 1.0 5 1.0 11 1.0 
LOAD COMB SRSS 27 LC4(SSE WITH -VE SL)
-1 1.0 -5 1.0 9 1.0 10 1.0 11 1.0 1
PERFORM ANALYSIS PRINT STATICS CHECK
FINISH
LOAD 1 LOADTYPE Dead  TITLE DL
SELFWEIGHT Y -1
JOINT LOAD
8 FY -150
LOAD 2 LOADTYPE Live  TITLE SL(OBE)
JOINT LOAD
8 FY 896
LOAD 4 LOADTYPE Live  TITLE SL(OBE)WITH -VE
JOINT LOAD
8 FY -896
LOAD 6 LOADTYPE Seismic  TITLE EQX(OBE)
SELFWEIGHT X 1
SELFWEIGHT Y 1
SELFWEIGHT Z 1
JOINT LOAD
8 FX 896
8 FY 896
8 FZ 896
8 FX 150
8 FY 150
8 FZ 150
SPECTRUM SRSS X 0.5 ACC DAMP 0 LIN MIS 0
20 642.3; 4 642.3; 2.5 971.4; 2.22222 1238.5; 2 1386.7; 1.53846 1541.9;
1.42857 1771.8; 1.33333 1771.8; 1.17647 2049.3; 1.05263 2206.9; 0.869565 2206.9;
0.740741 2506.9; 0.714286 2506.9; 0.666667 2588.5; 0.645161 2815.4; 0.625 2885.7;
0.588235 2885.7; 0.555556 3033.9; 0.540541 3445; 0.487805 3714.5; 0.47619 3901;
0.454545 4087.5; 0.425532 5008.1; 0.416667 6094.3; 0.4 7652.8; 0.294118 7652.8;
0.285714 6305; 0.28169 5719.4; 0.277778 5310.2; 0.27027 5216.6; 0.253165 4842.1;
0.240964 4804.6; 0.238095 4902; 0.208333 4931.3; 0.204082 5025.4; 0.20202 5230.2;
0.19802 5552.7; 0.192308 5730.5; 0.190476 6146.6; 0.188679 6354.7; 0.18018 6391.1;
0.134228 6391.1; 0.131579 6373.2; 0.12987 6542.8; 0.0961538 6542.8; 0.0952381 6449.7;
0.0930233 6405.7; 0.0925926 6375.4; 0.0921659 6264.3; 0.0909091 6101.6;
0.0904977 6094.9; 0.0896861 6309.2; 0.0892857 6523.5; 0.0877193 6768.9;
0.0873362 6768.9; 0.0865801 6789.3; 0.0858369 6976.8; 0.0851064 6979.5;
0.0626959 6979.5; 0.0591716 6911.2; 0.0588235 5887.8; 0.058651 5697.3;
0.058309 5506.9; 0.0568182 5506.9; 0.0554017 5261.7; 0.0550964 4632.1;
0.0549451 4362.3; 0.0544959 3794.6; 0.0526316 3480.7; 0.052356 3112.7;
0.0522193 2954.4; 0.0520833 2847.5; 0.0508906 2812.8; 0.0502513 2574.9;
0.0496278 2528.1; 0.0452489 2106.7; 0.0433839 1876.6; 0.04329 1835.8;
0.0357143 1592.4; 0.0322061 1592.4; 0.030303 1473.8;
LOAD 7 LOADTYPE Seismic  TITLE EQY(OBE)
SPECTRUM SRSS Y 0.33 ACC DAMP 0 LIN MIS 0
20 429.3; 4 429.3; 2.5 647; 2.22222 819.6; 2 919.7; 1.53846 1021.7; 1.42857 1186.2;
1.33333 1186.2; 1.17647 1361.9; 1.05263 1469.4; 1 1478.8; 0.869565 1478.8;
0.740741 1644.6; 0.714286 1644.6; 0.666667 1689.9; 0.645161 1792.2; 0.625 1800;
0.588235 1800; 0.555556 1886.2; 0.540541 2099.5; 0.487805 2492.3; 0.47619 2745.1;
0.454545 2997.9; 0.425532 3600.7; 0.416667 4470; 0.4 5806.8; 0.294118 5806.8;
0.28169 4840; 0.266667 4651.5; 0.263158 4831.2; 0.25 4935.2; 0.246914 5195.4;
0.243902 5529.4; 0.238095 5863.4; 0.212766 5863.4; 0.208333 6031.4; 0.206186 6215.2;
0.204082 6544.6; 0.20202 7150.8; 0.19802 7704.2; 0.145985 7704.2; 0.142857 7702.7;
0.141844 7564.7; 0.13986 7443.8; 0.134228 7406.6; 0.133333 8257.9; 0.12987 9924.1;
0.0961538 9924.1; 0.0930233 9815.6; 0.0921659 9590.4; 0.0917431 9501.6;
0.0913242 9460.4; 0.0909091 9439.8; 0.0809717 9439.8; 0.0803213 9359.5;
0.0796813 9336.8; 0.0790514 9162.5; 0.0787402 9104.4; 0.078125 8903;
0.0775194 8767.9; 0.0772201 8632.7; 0.0760456 7274.8; 0.0754717 6928.1;
0.0740741 6347.3; 0.0738007 5916; 0.0732601 5484.7; 0.0727273 5450.7;
0.0711744 5450.7; 0.0704225 5420; 0.0699301 5295.7; 0.0687285 5219.2;
0.0682594 4909.2; 0.0680272 4786.7; 0.0677966 4729.3; 0.0657895 4612.7;
0.0643087 4159; 0.0641026 4114.8; 0.0591716 3521.6; 0.0588235 3196.6;
0.058651 3114; 0.0465116 3114; 0.0458716 3009; 0.0452489 2706; 0.0444444 2349.8;
0.0433839 2006.9; 0.0431965 1889.9; 0.0323102 1392.9; 0.030303 1392.9;
LOAD 8 LOADTYPE Seismic  TITLE EQZ(OBE)
SPECTRUM SRSS Z 0.5 ACC DAMP 0 LIN MIS 0
20 644.6; 4 644.6; 2.5 971.8; 2.22222 1232.1; 2 1388.6; 1.53846 1541.5;
1.42857 1786.9; 1.33333 1786.9; 1.17647 2039.4; 1.05263 2233.9; 0.869565 2233.9;
0.8 2359.3; 0.740741 2548.3; 0.714286 2548.3; 0.666667 2582.6; 0.645161 2762.9;
0.625 2821.1; 0.588235 2821.1; 0.555556 2970.2; 0.540541 3367.1; 0.47619 3885.4;
0.454545 4004.7; 0.425532 4812.9; 0.416667 5661.7; 0.4 6820.4; 0.294118 6820.4;
0.289855 6671.2; 0.285714 6570.5; 0.20202 6208.2; 0.19802 6546.1; 0.192308 6648.3;
0.190476 7168.6; 0.188679 7428.8; 0.185185 7502.7; 0.135135 7591.5; 0.134228 7904.8;
0.133333 8669.9; 0.12987 10225.3; 0.129032 10450; 0.128205 10899.4; 0.125786 10957.7;
0.0930233 10957.7; 0.0925926 10616.5; 0.0921659 10467.2; 0.0913242 10317.8;
0.0909091 10168.5; 0.0904977 9797.4; 0.0896861 9469.4; 0.0809717 9469.4;
0.0803213 9212; 0.08 9105.9; 0.0790514 8931.8; 0.0787402 8910.2; 0.078125 8787.4;
0.0775194 8620.8; 0.0772201 8454.2; 0.0763359 7597.2; 0.0760456 7343.4;
0.0757576 7124.7; 0.0754717 6950.4; 0.075188 6844.3; 0.0746269 6746.9;
0.0657895 6746.9; 0.0645161 6661; 0.0641026 6661; 0.0634921 6614.2; 0.0632911 6529.7;
0.0628931 6408.1; 0.0591716 5989.1; 0.0588235 4600.8; 0.058651 4031.7;
0.0584795 3712.6; 0.058309 3483.9; 0.0566572 3088.1; 0.0554017 3029.8;
0.0544959 2805.5; 0.0526316 2680.9; 0.0522193 2522.9; 0.0519481 2486.3;
0.0508906 2486.3; 0.0501253 2418.7; 0.0465116 2418.7; 0.0452489 2236.8;
0.0449438 2073.6; 0.030303 1571.9;
LOAD COMB 12 LC1(OBE)
1 1.0 2 1.0 6 1.0
LOAD COMB 13 LC2(OBE)
1 1.0 2 1.0 7 1.0
LOAD COMB 14 LC3(OBE)
1 1.0 2 1.0 8 1.0
LOAD COMB SRSS 15 LC4(OBE)
-1 1.0 -2 1.0 6 1.0 7 1.0 8 1.0 1
LOAD COMB 16 LC1(OBE WITH -VE SL)
1 1.0 4 1.0 6 1.0
LOAD COMB 17 LC2(OBE WITH -VE SL)
1 1.0 4 1.0 7 1.0
LOAD COMB 18 LC3(OBE WITH -VE SL)
1 1.0 4 1.0 8 1.0
LOAD COMB SRSS 19 LC4(OBE WITH -VE SL)
-1 1.0 6 1.0 7 1.0 8 1.0 -4 1.0 1
PERFORM ANALYSIS PRINT STATICS CHECK
FINISH
FINISH