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钢结构耐火弱点与对策

来源：钢盾宝

2026-03-11 15:37:22
钢材导热快且强度随温度升高衰减，无保护时耐火极限低。提升措施包括：涂覆防火涂料、包敷防火板、外包混凝土或设置自动喷淋冷却系统。设计时需根据建筑类别与耐火等级确定构件耐火极限（如柱2-3h，梁1.5-2h），并据此选择经济合理的防火方案。防火材料需与防腐体系相容，定期检查涂层完整性，确保火灾时结构在规定时间内维持承载力，为救援与疏散争取时间。
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  1. 请求信息 : 2026-04-24 18:40:30 HTTP/1.0 GET : http://www.steeldeep.com/college/detail-82.html
  2. 运行时间 : 0.027306s [ 吞吐率：36.62req/s ] 内存消耗：888.40kb 文件加载：153
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=b8774ca04fd5142ade45353b5019ac72
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  1. CONNECT:[ UseTime:0.001579s ] mysql:host=localhost;port=3306;dbname=gangdunbao;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `category_college` [ RunTime:0.003187s ]
  3. SELECT `code`,`name`,`slug` FROM `category_college` WHERE `status` = 1 ORDER BY `rank` DESC [ RunTime:0.000734s ]
  4. SHOW FULL COLUMNS FROM `college` [ RunTime:0.002247s ]
  5. SELECT * FROM `college` WHERE ( `id` = 82 AND `status` = 1 ) LIMIT 1 [ RunTime:0.000810s ]
  6. SELECT `id`,`title`,`pic1`,`create_time` FROM `college` WHERE ( `category` = '53' AND `status` = 1 AND `pic1` <> '' ) ORDER BY `create_time` DESC LIMIT 4 [ RunTime:0.000985s ]
  7. SELECT `id`,`title`,`pic1`,`create_time` FROM `college` WHERE ( `category` = '51' AND `status` = 1 ) ORDER BY `create_time` DESC LIMIT 8 [ RunTime:0.000731s ]
  8. UPDATE `college` SET `views` = 2 WHERE `id` = 82 [ RunTime:0.002905s ]
  9. SHOW FULL COLUMNS FROM `college_bk` [ RunTime:0.001825s ]
  10. SELECT * FROM `college_bk` WHERE ( `status` = 1 ) ORDER BY `rank` DESC [ RunTime:0.000618s ]
0.028522s