RR 22.01.00-3.3 IS 1893 2016 Seismic Irregularities Checks
STAAD.Pro can now check for vertical and plan irregularities per the IS 1893 2016 code for structures with defined rigid floor diaphragms.
2016年版IS 1893については、表5に従って水平方向の不規則性(ねじりおよび凹角コーナー)をチェックし、表6に従って垂直方向の不規則性(質量の不規則性および不規則モードの振動)をチェックすることができます。
2016年版IS 1893の出力例
2016年版IS 1893の地震の不規則性チェックに関する出力セクションの例:
-IRREGULARITY CHECKS STAAD.PRO IRREGULARITIES CHECK - ( IS1893-2016 ) v1.2 ********************************************************* Including Amendment no. 2 November 2020 ********************************************************* --TORSION IRREGULARITY CHECKS Torsion Irregularity Check Ref: Table 5 (i) - Ratio Limit(s): Lower-1.20 Upper-1.40 --------------------------------------------------------------------- edi : Design Eccentricity esi : Static Eccentricity bi : Floor/Diaphragm plan dimension perpendicular to force direction For Details Refer Clause 7.8 IS1893:2016-Part-1 --------------------------------------------------------------------- Using edi = 1.5esi + 0.05bi --------------------------- Displacement of extreme points of diaphragm(dia.) in X dir. ------------------------------------------------------------------------ Dia. Node Max. Disp. Node Min. Disp. Avg. Disp. Max./Avg. Status (mm) (mm) (mm) Disp. ------------------------------------------------------------------------ 1 7 0.4984 2 0.4662 0.4823 1.0333 PASS 2 12 2.4871 9 2.3990 2.4430 1.0180 PASS 3 16 6.1637 13 6.0157 6.0897 1.0122 PASS Using edi = esi - 0.05bi ------------------------ Displacement of extreme points of diaphragm(dia.) in X dir. ------------------------------------------------------------------------ Dia. Node Max. Disp. Node Min. Disp. Avg. Disp. Max./Avg. Status (mm) (mm) (mm) Disp. ------------------------------------------------------------------------ 1 2 0.4984 7 0.4662 0.4823 1.0333 PASS 2 9 2.4871 12 2.3990 2.4430 1.0180 PASS 3 13 6.1637 16 6.0157 6.0897 1.0122 PASS Using edi = 1.5esi + 0.05bi --------------------------- Displacement of extreme points of diaphragm(dia.) in Z dir. ------------------------------------------------------------------------ Dia. Node Max. Disp. Node Min. Disp. Avg. Disp. Max./Avg. Status (mm) (mm) (mm) Disp. ------------------------------------------------------------------------ 1 3 0.2699 2 0.2383 0.2541 1.0622 PASS 2 10 1.0087 9 0.9347 0.9717 1.0381 PASS 3 14 2.0463 13 1.9160 1.9812 1.0329 PASS Using edi = esi - 0.05bi ------------------------ Displacement of extreme points of diaphragm(dia.) in Z dir. ------------------------------------------------------------------------ Dia. Node Max. Disp. Node Min. Disp. Avg. Disp. Max./Avg. Status (mm) (mm) (mm) Disp. ------------------------------------------------------------------------ 1 3 0.3916 2 0.2319 0.3118 1.2562 WARNING* 2 10 1.3253 9 0.9131 1.1192 1.1841 PASS 3 14 2.5782 13 1.8732 2.2257 1.1584 PASS *** WARNING: The floor is irregular. Please ensure conformance with Cl. 7.1, Table 5, Sl No. (i) sec-i.a or sec-i.b.