Reduced Moment Capacity of the EN1993:1:1-2005

There is a validation example on this clause (6.2.8) of the Eurocode:

communities.bentley.com/.../12408.validation-problem-on-reduced-moment-capacity-as-per-cl6-2-8-of-en-1993-1-1-2005.aspx

Please go through it and let me know the anomaly that you have come across.

3 cheers to you for sharing this doc. Thanks for all the cals in there.

The problem i had is cleared now,  I actually had miscalculated the Non shear area and hence got some different result.

But now its clear.  Thumps up for this doc. Can you provide me with some sample cals?

MK.

Hi!

I don't really understand why in some sections, the reduction moment is not applied. Please, see text attached.

It seems that in sections Class 3 this reduction is not applied. Is not applied by this reason?? Why??

Furthermore, in EC3-1-5:2006 Ch 7.1 this reduction is also applied.

Thanks!

What STAAD.Pro version are you using? Could you attach that STAAD.Pro model?

Staad version 20.07.09.21

Beams 2132 & 2133


Thanks




STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 01-Jul-14
END JOB INFORMATION
INPUT WIDTH 79
*****************************************************GEOMETRY*****************
UNIT METER KN
JOINT COORDINATES
177 -884.46 111.1 120; 178 -884.46 111.1 126.5; 179 -881.46 111.1 120;
180 -881.46 111.1 126.5; 181 -878.46 111.1 120; 182 -878.46 111.1 126.5;
183 -875.46 111.1 120; 184 -875.46 111.1 126.5; 185 -872.46 111.1 120;
186 -872.46 111.1 126.5; 187 -869.46 111.1 120; 188 -869.46 111.1 126.5;
189 -866.46 111.1 120; 190 -866.46 111.1 126.5; 191 -884.46 113.2 120;
194 -884.46 113.2 126.5; 196 -881.46 113.2 120; 197 -881.46 113.2 126.5;
198 -878.46 113.2 120; 199 -878.46 113.2 126.5; 212 -875.46 113.2 120;
214 -875.46 113.2 126.5; 216 -872.46 113.2 120; 217 -872.46 113.2 126.5;
218 -869.46 113.2 120; 219 -869.46 113.2 126.5; 220 -866.46 113.2 120;
232 -866.46 113.2 126.5; 659 -866.46 111.1 121.8; 660 -866.46 111.1 124.7;
661 -866.46 111.1 123.25; 662 -869.46 111.1 121.8; 663 -872.46 111.1 121.8;
664 -875.46 111.1 121.8; 665 -878.46 111.1 121.8; 666 -881.46 111.1 121.8;
667 -884.46 111.1 121.8; 668 -869.46 111.1 123.25; 669 -869.46 111.1 124.7;
670 -866.46 113.2 123.25; 671 -866.46 113.2 121.8; 672 -866.46 113.2 124.7;
673 -869.46 113.2 121.8; 674 -872.46 113.2 121.8; 675 -875.46 113.2 121.8;
676 -878.46 113.2 121.8; 677 -881.46 113.2 121.8; 678 -884.46 113.2 121.8;
679 -869.46 113.2 123.25; 680 -869.46 113.2 124.7; 723 -866.46 111.1 123.8;
746 -884.46 110.4 120; 747 -884.46 110.4 126.5; 748 -875.46 110.4 120;
749 -875.46 110.4 126.5; 750 -866.46 110.4 120; 751 -866.46 110.4 126.5;
10800 -866.46 111.237 123.8; 10801 -884.96 111.1 120;
10802 -884.96 111.1 126.5;
MEMBER INCIDENCES
31 177 191; 32 178 194; 33 183 212; 34 184 214; 35 189 220; 36 190 232;
186 177 667; 187 179 177; 188 180 178; 189 181 179; 190 182 180; 191 183 181;
192 184 182; 193 183 664; 194 185 183; 195 186 184; 196 187 185; 197 188 186;
198 189 187; 199 190 188; 200 189 659; 201 191 678; 202 196 191; 203 197 194;
204 198 196; 205 199 197; 206 212 198; 207 214 199; 208 212 675; 209 216 212;
210 217 214; 211 218 216; 212 219 217; 213 220 218; 214 232 219; 215 220 671;
596 179 666; 597 181 665; 598 185 663; 599 187 662; 600 196 677; 601 198 676;
602 216 674; 603 218 673; 1439 723 660; 1440 10800 723; 1930 659 661;
1931 660 190; 1932 661 723; 1933 662 668; 1934 659 662; 1935 663 186;
1936 662 663; 1937 664 184; 1938 663 664; 1939 665 182; 1940 664 665;
1941 666 180; 1942 665 666; 1943 667 178; 1944 666 667; 1945 668 669;
1946 661 668; 1947 669 188; 1948 660 669; 1949 177 666; 1950 666 181;
1951 181 664; 1952 664 185; 1953 185 662; 1954 662 189; 1955 662 661;
1956 661 669; 1957 669 190; 1958 670 672; 1959 671 670; 1960 672 232;
1961 673 679; 1962 671 673; 1963 674 217; 1964 673 674; 1965 675 214;
1966 674 675; 1967 676 199; 1968 675 676; 1969 677 197; 1970 676 677;
1971 678 194; 1972 677 678; 1973 679 680; 1974 670 679; 1975 680 219;
1976 672 680; 1977 191 677; 1978 677 198; 1979 198 675; 1980 675 216;
1981 216 673; 1982 673 220; 1983 673 670; 1984 670 680; 1985 680 232;
2087 746 177; 2088 747 178; 2089 748 183; 2090 749 184; 2091 750 189;
2092 751 190; 2099 194 184; 2100 184 219; 2101 191 183; 2102 183 218;
2121 747 746; 2122 749 748; 2123 751 750; 2130 219 190; 2131 218 189;
2132 10801 177; 2133 10802 178;
START GROUP DEFINITION
MEMBER
_MAIN 31 TO 36 186 TO 215 1439 1930 TO 1932 1937 1943 1958 TO 1960 1965 1971 -
2087 TO 2092
_COLUMNS 31 TO 36 2087 TO 2092
_FRAMES 31 TO 36 186 193 200 201 208 215 1439 1930 TO 1932 1937 1943 1958 -
1959 TO 1960 1965 1971 2087 TO 2092
_PR_LONG 187 TO 192 194 TO 199 202 TO 207 209 TO 214
_PR_TRANS 596 TO 603 1933 1935 1939 1941 1945 1947 1961 1963 1967 1969 1973 -
1975
FLOOR
JOINT
END GROUP DEFINITION
*****************************************************MATERIAL*****************
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.05e+008
POISSON 0.3
DENSITY 76.93
ALPHA 1.2e-005
DAMP 0.03
TYPE STEEL
STRENGTH FY 253200 FU 407800 RY 1.5 RT 1.2
G 8.1e+007
ISOTROPIC BRACKETS
E 9e+009
POISSON 0.01
DENSITY 76.93
ALPHA 1e-010
DAMP 0.03
ISOTROPIC STEEL_NW
E 2.05e+008
POISSON 0.3
DENSITY 0.01
ALPHA 1.2e-005
DAMP 0.03
G 8.1e+007
END DEFINE MATERIAL
*****************************************************MEMBERS******************
MEMBER PROPERTY SPANISH
31 TO 36 2087 TO 2092 TABLE ST HEB300
186 193 200 201 215 1439 1930 TO 1932 1937 1943 1958 TO 1960 1965 -
1971 TABLE ST HEA300
187 TO 192 194 TO 199 202 TO 207 209 TO 214 TABLE ST HEA320
1934 1936 1938 1940 1942 1944 1946 1948 TO 1957 TABLE ST HEA100
1440 TABLE ST HEA140
596 TO 603 1933 1935 1939 1941 1945 1947 1961 1963 1967 1969 1973 -
1975 TABLE ST IPE240
208 2099 2101 2130 2131 TABLE ST HEB260
2121 TO 2123 TABLE ST HEA360
2100 2102 TABLE ST HEB300
1962 1964 1966 1968 1970 1972 1974 1976 TO 1985 TABLE ST HEA140
2132 TABLE ST HEA300
2133 TABLE ST HEB260
*****************************************
CONSTANTS
BETA 90 MEMB 31 TO 36 2087 TO 2092
MATERIAL STEEL_NW MEMB 1440
MATERIAL STEEL MEMB 31 TO 36 186 TO 215 596 TO 603 1439 1930 TO 1985 2087 -
2088 TO 2092 2099 TO 2102 2121 TO 2123 2130 TO 2133
*****************************************
*****************************************************RELEASES*****************
MEMBER RELEASE
1934 1936 1938 1940 1942 1944 1946 1948 TO 1957 1977 TO 1984 -
1985 START MY MZ KMX 0.001
1934 1936 1938 1940 1942 1944 1946 1948 TO 1957 1977 TO 1984 -
1985 END MY MZ KMX 0.001
191 192 198 199 206 207 213 214 596 TO 600 602 603 1962 1964 1966 1968 1970 -
1972 1974 1976 START MY MZ KMX 0.001
187 188 194 195 202 203 209 210 1935 1939 1941 1947 1962 TO 1964 1966 TO 1970 -
1972 1974 TO 1976 END MY MZ KMX 0.001
2099 TO 2102 2130 2131 START MY MZ KMX 0.001
2099 TO 2102 2130 2131 END MY MZ KMX 0.001
*****************************************************SUPPORTS*****************
SUPPORTS
746 TO 751 PINNED
*****************************************************LOADS********************
LOAD 10 LOADTYPE Dead TITLE DS1 SELFWEIGHT
SELFWEIGHT Y -1
JOINT LOAD
675 FZ 200
MEMBER LOAD
208 CON Y -800 0.01
208 CON Z 800 0.01
JOINT LOAD
10801 10802 FX 1 MX 0.02 MZ 300
MEMBER LOAD
2132 2133 CON GY -600 0.499
***************************************
PERFORM ANALYSIS PRINT ALL

PARAMETER 1
CODE EN 1993-1-1:2005
TRACK 2 ALL
PY 345000 ALL
TORSION 3 MEMB 208 2132 2133
KZ 3 MEMB 2087 TO 2092
KZ 2.5 MEMB 31 TO 36 2087 2088
KY 5 MEMB 32 2087 TO 2092

LZ 9 MEMB 187 TO 192 194 TO 199 202 TO 207 209 TO 214
LZ 6.5 MEMB 186 193 200 201 208 215 596 TO 603 1439 1930 TO 1933 1935 1937 -
1939 1941 1943 1945 1947 1958 TO 1961 1963 1965 1967 1969 1971 1973 1975
LY 1.45 MEMB 1439 1932
UNL 1.45 MEMB 1439 1932

********************************************************
CHECK CODE ALL
********************************************************
FINISH