HPFL加固RC压弯构件抗高温性能试验研究  

Experimental Study on High Temperature Resistance of HPFL Reinforcing RC Compression-flexure Member

作　　者：付华[1] Fu Hua

机构地区：[1]湖南工业大学,湖南株洲412000

出　　处：《建筑技术开发》2020年第19期115-117,共3页Building Technology Development

摘　　要：HPFL加固效果好、施工简便、造价低廉,所用无机胶凝材料与混凝土的材性十分相近。利用HPFL对RG结构进行加固有更好的抗火性能。在经历高温时,利用HPFL进行RC偏压柱加固的挠度变化与普通混凝土偏压柱相比,明显偏低;普通混凝土偏压柱通过永久荷载的方式进行降温,可发现相对明显的残余压缩变形,但是在利用HPFL进行RC偏压柱中,却并没有发现变形现象;同时在经历高温的过程中,由于荷载本身发生了相对的移动,并且不断向低温面移动时,则在大偏压试验柱跨中的挠度,会出现凸向高温面的现象,而小偏压试验柱的跨中挠度凸向低温面;当荷载作用位置移向高温面时,试验柱跨中挠度凸向低温面。HPFL contains ingredient of the inorganic cementitious material is very similar to the material property of concrete and have the advantages of good reinforcement effect,easy construction and low cost. RG structure reinforced by HPFL has better fire resistance. The deflection of RC eccentric compression column reinforced by HPFL is obviously lower than that of ordinary concrete eccentric compression column under the high temperature. The relatively obvious residual compression deformation can be found in the ordinary concrete eccentric compression column column by constant load cooling,but the deformation is not found in the RC eccentric compression column reinforced by HPFL. At the same time,during the high temperature,due to relative movement of load itself and moving towards to the low temperature surface,the deformation of mid-span of large eccentric compression test column will be convex to the high temperature surface,while the mid-span deflection of the small eccentric test column is convex to the low temperature surface. When the position of load move to the high temperature surface,the mid-span deflection of test column is convex to the low temperature surface.

关 键 词：HPFL加固法 RC压弯构件 剩余承载力 变形特征 

分 类 号：TU391[建筑科学—结构工程]