李华, 武兰河. 单根曲线梁法计算连续曲线梁桥影响线[J]. 工程力学, 2005, 22(S1): 26-30.
引用本文: 李华, 武兰河. 单根曲线梁法计算连续曲线梁桥影响线[J]. 工程力学, 2005, 22(S1): 26-30.
LI Hua, WU Lan-he. INFLUENCE LINE CONSTRUCTION OF CONTINUOUS CURVED BEAM BRIDGE USING SINGULAR-CURVED-BEAM-METHOD[J]. Engineering Mechanics, 2005, 22(S1): 26-30.
Citation: LI Hua, WU Lan-he. INFLUENCE LINE CONSTRUCTION OF CONTINUOUS CURVED BEAM BRIDGE USING SINGULAR-CURVED-BEAM-METHOD[J]. Engineering Mechanics, 2005, 22(S1): 26-30.

单根曲线梁法计算连续曲线梁桥影响线

INFLUENCE LINE CONSTRUCTION OF CONTINUOUS CURVED BEAM BRIDGE USING SINGULAR-CURVED-BEAM-METHOD

  • 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。

     

    Abstract: 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 unit torsion moment mz=1 is obtained. The analysis process is examplified, which is applicable to both computer and h and calculation.

     

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