【摘要】 本文进行了四跨钢结构门式框架有铰和无铰的模型试验及弹塑性理论计算。用力法逐次渐近进行框架塑性分析。此法与试验结果较一致，且比用上限理论（机动法）简捷。在荷载和几何尺寸相同的情况下，无铰框架的承载能力大于有铰框架的承载能力，水平位移也小。建议塑性设计法应在无铰门式框架中推广应用。更多还原

【Abstract】 This paper makes a further study of theory calculation.and modelexperiment on the four-span steel structure of portal frames with and,withouthinges,The altcrnative plastic analysis has been carried out by means of theforce method,and tbe result obtained is in good agreement with that obtainedthrough experiment; besides,it is simple and more convenient,When theapplied load and shape of the frame are in the same condition,the bearingcapacity of the frame with no hinges is bigger than that with some hinges,and the side displacement is also smaller than that with some binges,Portalframes without hinges may therefore be extended for further applicatiou incivil engineering。更多还原