摘要
基于纯扭转理论单根曲线梁法,对常见的约束扭转简支支座(即两端支座扭转受约束但转动为自由,中间支座扭转与转动均受约束)等截面连续曲线梁进行分析。基本思路:在中间支座设虚铰代之以冗力弯矩,并利用变形协调条件求出该值;形成若干单跨一次超静定曲梁基本体系,求出基本体系在单位竖向荷载P=1和单位扭矩mz=1作用下的内力影响线。并示例说明,可供手算及编制程序电算使用,具有一定的实用意义。
The singular-curved-beam-method based on the pure torsion theory is used to analyze the ordinary continuous curved beam with torsion constraint. The beam is prismatic and simply supported. The basic idea is as follows: the redundant bending moment is assumed at a virtual hinge at the middle support and calculated using compatibility condition of deformation. Then the calculation may be conducted at each individual span system. The internal force influence line under the action of unit vertical load P=1 or u...
出处
《工程力学》
EI
CSCD
北大核心
2005年第S1期26-30,共5页
Engineering Mechanics
关键词
曲线梁
内力影响线
单根曲线梁法
纯扭转理论
约束扭转简支支座
冗力弯矩方程
continuous curved beam
internal force influence line
singular-curved-beam-method
pure torsion theory
simple support with torsion restrained
redundant bending moment equation
