| Top beam (Figures 2 and 3) | DL_SGB | 0.300E − 2 | 0.450E − 2 | DL_SGB, DL_XGB, DL_FUB, DL_DUB, DL_GEB1, DL_GEB2, LZ_GB5, LZ_GB12, LZ_H_T, Z_M_T1, Z_M_T2, Z_LZ_T. Due to the limit of width and length, hot rolled heavy steel plate (GB/T709-1998) was selected [36] and those sizes of 0.004 m were all optimized to 0.0045 m; LZ_CAO was originally 20# channel steel size. Due to the structural relationship, this channel steel can only choose 20 or 20a channel steel. Therefore, the size of 0.0040045 m was optimized to 20a cannel steel size of 0.007 m (GB/T 707-1988) [37]; LZ_H_W was the structure size of the connection between the column and column support. Due to the structural relationship, the size of 0.19 m was optimized to 0.2 m; LZ_J1W, LZ_J1H, LZ_J1D were originally 10/6.3 scalene angle steel 100 × 63 × 6. According to optimization, those sizes were revised to 5/3.2 scalene angle 50 × 32 × 4 (GB/T 9787-1988) [38]; LZ_ZHI_O, LZ_ZHI_I, LZ_LA_O, and LZ_LA_I were the geometric sizes of the column support of contacting column, and the column support was the hollow steel pipe. Taking into account the choice of materials, those sizes were revised to 0.086 m, 0.082 m, 0.053 m, and 0.049 m; Z_T_W, Z_T_H, Z_T_T1, and Z_T_T2 were the sizes of the original structure which was composed of two 14# equal-leg angle steel. According to the optimization, the structure was revised to 9# equal-leg angle steel composite structure (GB/T 9787-1988) [38], those sizes were revised, respectively, to 0.180 m, 0.09 m, 0.006 m, and 0.012 m. |
