摘要
研究受到檩条和隅撑支撑作用的梁的弯扭,首先对檩条-隅撑体系提供结果的侧向支撑刚度进行了推导,然后考虑梁的初始侧移,研究了使梁的临界弯矩达到屈服弯矩时隅撑中的内力,这个内力即是对隅撑的强度要求。通过4个算例表明,隅撑轴力不到下翼缘屈服轴力侧向分量的1%,远小于《门式刚架轻型房屋钢结构技术规程》(CECS 102∶2002)中规定的支撑力。
It was investigated the buckling of beams braced by purlin-knee-bracing system.The bracing stiffness of the purlin-knee bracing system is analysed.Then the initial out-of-plane deflection of the beam is considered to find the knee-bracing forces when the buckling moment reaches the yield moment of the beam.It is found that the maximum knee-bracing forces is less than 1% of the lateral yield force of the beam bottom flange,which is far less than the value required by the specification CECS 102∶2002.
出处
《工业建筑》
CSCD
北大核心
2006年第z1期575-578,共4页
Industrial Construction
关键词
梁
弯扭失稳
隅撑
强度
刚度
beam flexural-torsional buckling knee-brace strength stiffness
