单跨均布荷载作用下两跨连续梁弹塑性分析  

Elastic-plastic Analysis of a Continuous Beam Under an Even Load

作　　者：樊友景[1] 

机构地区：[1]郑州大学土木工程学院,郑州450001

出　　处：《郑州大学学报（理学版）》2008年第4期110-114,共5页Journal of Zhengzhou University:Natural Science Edition

摘　　要：采用柔度法对两跨连续梁在一跨有均布荷载作用下的加载全过程进行了弹塑性分析,结果表明,受力变形过程可分为3个阶段:全梁弹塑性变形阶段,左跨中点附近产生弹塑性变形到形成塑性铰阶段,中间支座处截面由弹塑性变形到形成塑性铰阶段.讨论了加载各阶段的荷载、弯矩和位移计算公式,可供对连续梁进行强度和刚度计算时参考.The elastic-plastic loading of the two span continuous beam under an even load is analyzed by using flexibility method. The result shows that the deformation process can be divided into 3 stages： an elastic state in the whole beam, an elastic-plastic state in the region close to the left span center point till the formation of plastic hinge, and an elastic-plastic state in the region near the intermediate brace section till the formation of plastic flow state with a plastic hinge at the left span center point. And formulas for load, bending moment and displacement at different loading stages are derived. It can offer reference to intensity and rigidity computation of the continuous beam.

关 键 词：连续梁 柔度法 弹塑性 塑性铰 极限状态 

分 类 号：TU323.3[建筑科学—结构工程]