摘要
针对一座受洪水侵袭的体育馆赛场楼面开裂现象,采用有限元程序,分别在两种最不利荷载组合情况下,对结构进行内力分析。根据楼面的位移场、应力场、弯矩和轴力值,对楼板开裂进行了综合分析。结果表明,水浮力过大,部分桩抗拔作用不足,导致楼板混凝土拉应力超过抗拉强度标准值,能很好地解释赛场楼板开裂现象。最后给出了防止和解决这一问题的方法,并在实践中证明了该分析方法正确性。
To analyze the crack of stadium floor plate subjected to flood invasion, Ansys5.7 is used to calculated the internal force of the structure under 2 worst-case load combination. Comprehensive analysis on floor plate crack is carried out according to the displacement field, stress field and internal force of the floor plate. It＇s indicated that the floor plate cracked because the tensile stress exceeded the allowable stress, and that the uplift resistance force supplied by tension pile cannot resist the hydraulic uplift force. A method is presented for prevention and solving of the problem mentioned above, and its validity has been verified in engineering practice.
出处
《低温建筑技术》
2005年第6期125-127,共3页
Low Temperature Architecture Technology
关键词
楼板
裂缝
有限元
第一主应力
抗拔
负摩阻力
水浮力
floor plate
crack
finite
element
first principal stress
uplift resistance
negative friction resistance force
hydraulic uplift force
