摘要
一跨度为30m的钢木桁架在支座节点采取偏心抵承后,当偏心距e0=M/Nl时,则使上弦节间弯矩M=0。故上弦的受力状态由压弯构件改变为轴心受压构件,致使偏心抵承后的上弦杆截面仅为其无偏心时的75%,30余年的使用实践表明,偏心抵承不仅大大改善了上弦杆的受力状态,而且有十分明显的经济效益。
After take eccentric bearing in support joint of a steel-timber truss of span 30m, At that time e0=M/N1 effect bending moment M=0 of the panel of top chord .to this end from compression and bending member alter to axial compression member of accept force states in top chord, Lead to seventy-five percent in section of top chord of eccentric bearing by contrast with not eccentric beating. Make known for use practice of thirty year and more , not only greatly improve accept force states for eccentric bearing of top chord, and have economic benefit fully salient.
出处
《工程建设与设计》
2006年第9期45-48,共4页
Construction & Design for Engineering
关键词
钢木桁架
上弦截面
偏心抵承
steel-timber sruss
section of top chord
eccentricbearing
