【摘 要】
：
To meet the requirement of fire endurance for concrete structures strengthened with CFRP sheets,this study develops an inorganic adhesive whose strength at 600
【机 构】
：
School of Civil Engineering
论文部分内容阅读
To meet the requirement of fire endurance for concrete structures strengthened with CFRP sheets,this study develops an inorganic adhesive whose strength at 600℃ is not lower than that at normal room temper ature.The inorganic adhesive is then used to bond CFRP sheets on reinforced concrete beams in order to strengthen them.The fire protection of the CFRP sheets is done using the thick-type fireproofing coatings for tunnel(TFCT)and steel structure(TFCSS)respectively.Four specimens are tested in the furnace together.Specimens are exposed to fire for 1.5 h in according to the ISO834 standard fire curve,and then naturally cooled for 1 h.In the tests,the largest displacements at the mid-span positions of specimens are only from1/1400 to 1/318 of actual span corresponding to the highest temperatures from 300 ℃ to 470 ℃.After the specimens are naturally cooled to the normal temperature and the fireproofing coatings are then removed,it can be seen that the CFRP sheets keep in a good state,which indicates that CFRP sheets can be tightly bonded on the concrete and work well together with the concrete beams during and after fire.Besides,the tests also verify that the fire performance of TFCT is superior to TFCSS for the strengthened beams.
其他文献
目的 观察急性区域性外层视网膜病变(AZOOR)的临床特点以及频域光相干断层扫描(SD-OCT)的图像特征,探讨OCT在评估AZOOR发生、发展中的临床价值.方法 临床检查确诊的AZOOR患者
Objective To explore metabolic changes after acute hypoxia and modulating effect of vitamins B1,B2, and PP supplementation in mice exposed to acute hypoxia. Met
A CO2 laser die-cutting system,which does not need die board any more,is a new technique for manufacturing packing box.Two optical paths,the galvanometer scanni
This paper presents an algebraic method to attack the projected C*- cryptographic scheme. The attack applies the affine parts of the private keys and the weakne
城市规划管理是一项综合性的工作，它对于城市发展有着重要作用。本文主要论述了城市规划管理对城市经济发展的作用，以此来提高政府对城市规划管理工作的重视。
目的:探讨口服利培酮治疗对急性未服药精神分裂症患者听感觉门控P50的影响.方法:共纳入急性未服药精神分裂症患者64例(首发36例,复发28例),采用可变剂量利培酮治疗,分别于治
Organ-specific tumor cell adhesion to extracellular matrix (ECM) components and cell migration into host organs often involve integrin-mediated cellular process
从我县的县情--正处于工业化初期和农业大县的实际来看，无论是统筹城乡发展，推进农业现代化、农民市民化、农村城镇化，实现城乡一体化，还是加快转变经济发展方式，实现集约发展、科
Components of electromechanical systems usually contain multiple performance parameters and degrade over time. In previous studies, the reliability of these ele
The possibility of rats mesenchymal stem cells (MSCs) modified with murine hyperpolarization-activated cyclic nucleotide-gated 2 (mHCN2) gene as biological pace