The relative ultimate bearing capacity of PHFB with that of HFB is compared, then the difference between PHFB under uniformly distributed loads and PHFB under uniform bending is analyzed.

比较了PHFB梁与HF B梁的相对极限承载力，分析了PHFB梁在均布荷载和纯弯作用下的极限承载力的不同特点。

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The ultimate bearing bending capacity of a double steel-concrete composite beam was also calculated by the simplified calculating method based on the elasticity and plasticity.

建立钢-混凝土双面组合梁截面弹性极限和塑性极限承载能力的简化计算方法。

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