连续组合梁的弯矩调幅系数与内力重分布
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摘要
弯矩调幅系数是反映连续组合梁内力重分布能力的参数。连续组合梁达到承载力极限状态的标志是陆续出现塑性铰 ,最终形成破坏机构 ,并在这一过程中实现内力的重分配。连续组合梁可以通过弯矩调幅把中支座截面弯矩向跨中分配 ,以适应中支座截面抗弯能力略低的状况 ,有利于提高连续组合梁的极限承载力。
Amplitude modulation coefficient is a parameter,by which the capacity of internal force redistribution in continuous composite beams is reflected. When plastic hings take form one after another,the continuous composite beam reaches it's ultimate load,at last a destructive mechanism is formed.In this course intermal force redistribution happens.In continuous composite beams,the middle abutment's ability of bearing bending moment is smaller than middle span. Continuous composite beam can allot bending moment from middle abutment to middle span by amplitude modulation ,It is benefitfor increasing continuous composite beam's ultimate load.
引文
[1] 王庆利.连续组合梁的受力性能和变形行为的试验研究和理论分析[M ].沈阳:东北大学,1998.
    [2] 吴 献.底包角钢火山渣混凝土组合梁的试验研究及性能分析[M ].沈阳:东北大学,1992.
    [3] 池田尚治,等著,李光瑞,等译.钢—混凝土组合结构设计手册[M ].北京:地震出版社,1992.

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