新型塑料建筑模板在建筑工程中的应用研究

Study on Application of New Plastic Construction Formwork in Construction

固定模板（SIP）的使用对混凝土结构来说已变得越来越受欢迎，主要是因为其可规划建设且节约劳动力的优点。先前的研究表明，聚氯乙烯（PVC）对增强钢筋混凝土的强度和延性有进一步的加强。为了进一步了解聚合物在弯曲阻力上起到的作用，利用两种类型的PVC面板：平面的或空心的，对抗压强度值为25MPa的钢筋混凝土墙做了一个测试。研究的变量有混凝土芯厚度（152、178和203mm）、钢筋长度（3—10或3—15m）及面板类型（空心或平面）。在四点弯曲的墙壁上进行了测试。由于钢筋问题导致墙体倒塌，根据配筋率和面板类型可知，紧随其后的就是混凝土墙破碎、PVC弯曲甚至PVC破裂。空心板包裹的样本也经历了板的拉伸面滑移。PVC包装增强屈服荷载、极限荷载、延性和韧性。

The use of stay-in-place （SIP） formwork has become an increasingly popular tool for concrete structures due to its advantages in construction scheduling and labor reduction. Previous research suggests that polyvinyl chloride （PVC） provides an enhancement to the strength and ductility of reinforced concrete. The research herein outlined tests on reinforced concrete walls with a compressive strength of 25 MPa, utilizing two types of PVC panels： flat or hollow, in order to further understand the polymer＇s contribution to fiexural resistance. Variables studied included concrete core thickness （152, 178, 203 mm）, length of rebar （3 -10 m or 3 -15 m）, and panel type （hollow or fiat）. The walls were tested in four point bending. The walls failed due to steel yielding followed by concrete crushing, PVC buckling, and/ or PVC rupture depending on the reinforcement ratio and panel type. The hollow panel encased specimens also experienced slip of the panels on the tensile face. The PVC encasement enhanced the yield load, ultimate load, ductility, and toughness of the concrete walls. Concrete cores were taken from the tested PVC encased specimens and compressive strength was found to be the same as the control walls.