为研究不同参数对管幕预筑（PRP）结构构件受弯性能的影响，本文以截面变化、设置钢管幕及连接件、配筋率为参数进行了试验研究，对比了试件的裂缝发展和破坏形态，分析了试件的变形及应变规律。结果表明，截面变化对钢筋混凝土构件受弯性能影响不大；钢管幕对PRP结构构件受弯承载力有很大贡献；箍筋延长、并焊接在两侧钢管幕上作为连接件可提高PRP结构受弯构件的力学性能；增大配筋率能提升构件的受弯承载力。根据试验结果，对现行PRP结构受弯构件承载力计算方法进行了评估，推荐在工程中采用设置连接件的（新）PRP结构。

In order to study the influence of different parameters on the flexural performance of pipe-roof pre-construction (PRP) structure components, experiment of 12 flexural specimens was conducted with cross-section variation, setting steel pipe curtain and connectors, as well as the reinforcement ratio as parameters in this paper. Crack development and failure modes of different specimens were compared. Rulers of deflections, and strains in all specimens were analyzed. Experimental results indicate that: the change of cross section height has little effect on the bearing capacity of reinforced concrete (RC) members; steel pipe curtains have significantly contribution on the load carrying capacity of PRP flexural components; the mechanical properties of PRP flexural components can be enhanced by replacing stirrup as connectors; the increase of reinforcement ratio can improve the bearing capacity of flexural components. According to experimental results, the current calculation method of flexural bearing capacity of PRP structure was evaluated; and PRP structure with connectors, named as new pipe-roof pre-construction structure (NPRP), was recommended in the project.