miaoliuhua wrote:
下面再提供我个人编写的基于LRFD标准的荷载组合(中国规范部分一致):
***基本荷载工况
LOAD 1 DEAD LOADS (DL)
LOAD 2 COLLATERAL LOADS (CL)
LOAD 3 ROOF LIVE LOADS (LLR)
LOAD 4 FLOOR LIVE LOADS (LLF)
LOAD 5 WIND LOADS FROM LEFT (WL)
LOAD 6 WIND LOADS FROM RIGHT (WR)
LOAD 7 SNOW LOADS (SL)
LOAD 8 SEISMIC FORCES FROM LEFT (SEL)
LOAD 9 SEISMIC FORCES FROM RIGHT (SER)
***不带吊车的MBMA荷载组合(用于构件较核)
LOAD COMB 100 1.4DL + 1.4CL
1 1.4 2 1.4
LOAD COMB 101 1.2DL + 1.2CL + 0.5LLR + 1.6LLF
1 1.2 2 1.2 3 0.5 4 1.6
LOAD COMB 102 1.2DL + 1.2CL + 1.4LLR + 0.5LLF
1 1.2 2 1.2 3 1.4 4 0.5
LOAD COMB 103 1.2DL + 1.2CL + 0.5LLF +1.6SL
1 1.2 2 1.2 4 0.5 7 1.6
LOAD COMB 104 1.2DL + 1.2CL + 1.4LLF +0.5SL
1 1.2 2 1.2 4 1.4 7 0.5
LOAD COMB 105 1.2DL + 1.2CL + 1.4LLR + 0.8WL
1 1.2 2 1.2 3 1.4 5 1.12
LOAD COMB 106 1.2DL + 1.2CL + 1.4LLR + 0.8WR
1 1.2 2 1.2 3 1.4 6 1.12
LOAD COMB 107 1.2DL + 1.2CL + 1.6SL + 0.8WL
1 1.2 2 1.2 7 1.6 5 1.12
LOAD COMB 108 1.2DL + 1.2CL + 1.6SL+ 0.8WR
1 1.2 2 1.2 7 1.6 6 1.12
LOAD COMB 109 1.2DL + 1.2CL + 1.3WL + 0.5LLR + 0.5LLF
1 1.2 2 1.2 5 1.82 3 0.5 4 0.5
LOAD COMB 110 1.2DL + 1.2CL + 1.3WR + 0.5LLR + 0.5LLF
1 1.2 2 1.2 6 1.82 3 0.5 4 0.5
LOAD COMB 111 1.2DL + 1.2CL + 1.3WL + 0.5SL + 0.5LLF
1 1.2 2 1.2 5 1.82 7 0.5 4 0.5
LOAD COMB 112 1.2DL +1.2CL + 1.3WR + 0.5SL + 0.5LLF
1 1.2 2 1.2 6 1.82 7 0.5 4 0.5
LOAD COMB 113 1.2DL + 1.2CL + 1.0SER + 0.2SL + 0.5LLF
1 1.2 2 1.2 8 1.0 7 0.2 4 0.5
LOAD COMB 114 1.2DL + 1.2CL + 1.0SEL + 0.2SL + 0.5LLF
1 1.2 2 1.2 9 1.0 7 0.2 4 0.5
LOAD COMB 115 0.9DL + 1.3WL
1 0.9 5 1.82
LOAD COMB 116 0.9DL + 1.3WR
1 0.9 6 1.82
LOAD COMB 117 0.9DL + 0.9CL + 1.3SER
1 0.9 2 0.9 8 1.3
LOAD COMB 118 0.9DL + 0.9CL + 1.3SEL
1 0.9 2 0.9 9 1.3
LOAD COMB 119 DL + CL + LLR + LLF
1 1 2 1 3 1 4 1
"MBMA 2002" page I-182,
"Load combinations are covered in IBC 2000,section 1605.Two alternate sets of allowable stress combinations are provided and one set of LOAD and RESISTANCE FACTOR combinations is provided."
If IBC 2000, 1605.2 is followed, in your combination 109-113 and combination 115-118, the factor for WL should be 1.6 not 1.3 nor 1.82
In combination 117 and 118, the factor for seismic force should be 1.0 not 1.3
Also, when combine seismic load,CL is usually not included in the combination, only the DL is considered.