跨径比对超静定连续梁静力特性的影响  

The Effects of Spans on the Static Behavior of Indeterminate Multi-span Beams

作　　者：李茂林[1] 赵美余[2] 黄明挥[1] 

机构地区：[1]南昌大学土木工程学院,江西南昌330029 [2]南昌有色冶金设计研究院,江西南昌330002

出　　处：《南昌大学学报（工科版）》2002年第3期59-62,共4页Journal of Nanchang University(Engineering & Technology)

摘　　要：采用结构力学位移法求解超静定多跨连续梁结构体系,分析了两种支承条件下的等截面三跨连续梁在不同跨径比时的静力特性,并讨论了跨径比对结构特性影响.数值结果表明,多跨连续梁的最佳跨径比与支承条件密切相关,文中给出了5种跨径比限制条件下的最佳跨径比.对于两端简支的三跨连续梁,等跨时梁的内力与最佳跨径比时梁的内力相差不大.The slop-deflection method of structural mechanics is adopted to deal with the indeterminate multi-span beams.The static behaviors of a three-span beam in two kinds of support conditions with different span ratios are analyzed and the effects of span ratio on static behavior are discussed.Numerical results show that the ideal span ratio is related to the support conditions.The ideal span ratios are given in five different cases.For the three-span continuous beam with two ends simply supported,there are slight differences between the bending moment in the case with equal spans and that in the case with ideal span ratio.

关 键 词：超静定连续梁 结构力学位移法 跨径比 静力特性 内力分布 工程结构 

分 类 号：TU322[建筑科学—结构工程]