成人午夜两性视频在线看,欧美日韩国产三级在线播放,亚洲成人一区二区三区三州,日本天堂电影免费观看,欧美日韩国产一区二区免费,欧美日韩亚洲蜜桃,91麻豆精品传媒一二三区,国产欧美久久精品免费,日韩中文字幕91,久久一级黄色视频播放,国产一区二区一级毛片,黄色日韩av在线,日韩一区精品在线,野花日本韩国电影免费,韩国日本大片免费看,国产大陆一级毛片av,欧美亚洲日本在线播放,精品久久午夜精品电影,中文字幕久久一区二区精彩,欧美一级视频在线,婷婷久久五月激情,久久夜夜国产高清,欧美三级日本三级人妇三久久

Control purposes tall buildings?

Control of high-rise building construction intentions?
Foshan multi-layered steel high-rise buildings, the height of the large, high-rise buildings constructed in order to ensure the necessary rigidity Foshan Steel respond layer between the maximum displacement and displacement to be controlled, the main intent of the following:
1, to ensure that the basic structure of the body in elastic stress state, to prevent cracks in the concrete wall studs, floor slab crack control number, width.
2, ensure the integrity of infill walls, walls, walls and other non-structural components, to prevent significant damage.
3, the regularity of the control plane configured to avoid the formation changes, adverse effects on the structure.