Superior design solutions of section sizes in steel buildings for different lateral frame systems and column shapes
Superior design solutions of section sizes in steel buildings for different lateral frame systems and column shapes
复制标题
针对不同横向框架系统和柱形状的钢结构建筑截面尺寸的卓越设计解决方案
DOI：
10.3130/aijs.84.1293
复制
发表时间：
2020
影响因子：
0.9
通讯作者：
M. Ohsaki
中科院分区：
文献类型：
--
作者：
J. Takagi;R. Obana;M. Ohsaki
Superior design solutions of seven-story steel buildings are obtained by multiple start local search (MSLS), minimizing the steel volume for three types of structural systems: a space frame system with rectangular HSS columns (SFS), perimeter frame systems (PFS) with I-shaped columns (PFSH) and PFS with rectangular HSS columns (PFSB). Most beam-to-column connections are moment connections in SFS, while they are limited in the perimeter frames in PFS. In terms of steel volume, PFSH is advantageous for moment frame buildings, and so are SFS and PFSB for braced frames with uniform column spacing. SFS is disadvantageous for mixed moment and braced frame buildings. Superior design solutions of seven-story steel buildings are obtained by multiple start local search (MSLS), minimizing the steel volume for three types of structural systems: a space frame system with rectangular HSS columns (SFS), perimeter frame systems (PFS) with I-shaped columns (PFSH) and PFS with rectangular HSS columns (PFSB). Most beam-to-column connections are moment connections in SFS, while they are limited in the perimeter frames in PFS. In terms of steel volume, PFSH is advantageous for moment frame buildings, and so are SFS and PFSB for braced frames with uniform column spacing. SFS is disadvantageous for mixed moment and braced frame buildings. 耐震架構配置と柱断面形状が異なる鋼構造建物の優良設計解 Superior design solutions of seven-story steel buildings are obtained by multiple start local search (MSLS), minimizing the steel volume for three types of structural systems: a space frame system with rectangular HSS columns (SFS), perimeter frame systems (PFS) with I-shaped columns (PFSH) and PFS with rectangular HSS columns (PFSB). Most beam-to-column connections are moment connections in SFS, while they are limited in the perimeter frames in PFS. In terms of steel volume, PFSH is advantageous for moment frame buildings, and so are SFS and PFSB for braced frames with uniform column spacing. SFS is disadvantageous for mixed moment and braced frame buildings. Superior design solutions of section sizes in seven-story steel buildings are obtained for three types of structural systems: (1) a space frame system with rectangular HSS columns (SFS), (2) perimeter frame systems (PFS) with I-shaped columns (PFSH), (3) PFS with rectangular HSS columns (PFSB). Moment connections are used in most beam-to-column connections in SFS, while they are limitedly used in the perimeter frames in PFS. SFS is a commonly used structural system in Japan, whereas PFSH is commonly used in other countries. In this research, structural characteristics of SFS, PFSH and additionally PFSB are evaluated for evenly rationally designed office buildings using an optimization algorithm. The superior solutions are derived by multiple start local search (MSLS), minimizing steel volumes. The solutions satisfy multiple requirements of the allowable stress design and ultimate lateral strength. The discrete design variables are the section sizes of grouped structural members. Approximately 100 constraints and 40 variables are applied. Dealing with these large numbers, the proposed MSLS algorithm works and superior solutions are obtained for various types of buildings, such as moment frame, braced frame and mixed frame buildings, in the three types of structural systems, SFS, PFSH and PFSB. Pipes or buckling restrained braces (BRB) are used in the braced frame buildings. The findings are as follows: Superior solutions for moment frame buildings are obtained for the base-shear coefficient of the ultimate lateral strength, C QUN1 , as 0.3 and 0.6. Although the value of 0.6 for C QUN1 is given by referring to responses in the time-history analyses for very rare (L2) earthquake ground motions, the superior design solutions do not satisfy the standard design criteria against L2 earthquakes. The maximum inter-story