Shenzhen University

Huawei Technologies Co., Limited

Other

Jinan University

Ni, Zhuo

Xing, Feng

Feng Xing

Yingwu Zhou

Biao Hu

Xiaoxu Huang

Yinghua Huang

Zenghui Ye

Xinyan Lv

Yufei Wu

Aoxuan Wang

Ningxu Han

Yan Zhang

Hao Li

Ning Zhang

Yong Wang

Jian Hui Liu

Xiaodong Wang

Liexun Feng

Zhuo Ni

Zhongfeng Zhu

Dawang Li

Yuan Fang

Zhenyu Huang

Weilun Wang

Xiaowei Wang

Linfeng Li

Biao Liu

Zhu Ding

Zongjun Li

Zhili Ren

Bing Fan

Youbin Lan

Wenhui Guo

Menghuan Guo

Jihua Zhu

Ruibo Liu

Rui Hu

Jiazhao Liu

Miaochang Zhu

Longyuan Li

Wujian Long

Biqin Dong

Lili Sui

Hongfang Sun

Zuo Ni

A smart carbon fiber reinforced polymer (CFRP)-shape memory alloy (SMA) bar reinforced concrete structure integrating cathodic protection, force sensing, and bearing capacity self-adjustment is provided. A CFRP-wrapped composite bar with SMA embedded with an optical fiber in the smart CFRP-SMA bar reinforced concrete structure is both a concrete reinforced bar and an auxiliary anode for ICCP to prevent steel bars from being rusted. In addition, the SMA has an ability to adjust stress after excitation, and the embedded optical fiber can perceive a force condition of the composite bar. This structure system significantly improves durability of a concrete structure in a coastal environment, solves problems of in-service real-time bar sensing and bearing capacity control of the structure, and provides a new solution to performance degradation caused by deterioration of a CFRP anode in a traditional ICCP process.

Smart carbon fiber reinforced polymer-shape memory alloy bar reinforced concrete structure integrating cathodic protection, force sensing, and bearing capacity self-adjustment

The present disclosure relates to an optical-fiber-embedded and FRP-wrapped SMA composite bar with force sensing, stress driving, and structural reinforcement integrated. The surface of the plain round Fe-SMA bar is provided with a groove in advance for implantation of the sheathed optical cable such that the bar has a self-sensing function. The plain round Fe-SMA bar having a shape memory effect is used as a steel core, so it has the characteristic of self-tensioning; an FRP wrapping layer prevents corrosion of the plain round Fe-SMA bar used as the core and prevents fracture of the sheathed optical cable, thus improving the durability of a prestressed bar structures on the outer surface of the FRP wrapping layer may provide sufficient engaging force and anchoring effect, reducing loss of prestress due to friction and the like.

Optical-fiber-embedded and FRP-wrapped SMA composite bar with force sensing, stress driving and structural reinforcement integrated

Disclosed are a steel fiber composite intelligent bar with a sheathing optical cable embedded in an inner core of a rebar, and a fabrication method thereof. The steel fiber composite intelligent bar includes the sheathing optical cable, the rebar, a winding layer, and tightening sheaths, wherein the sheathing optical cable comprises a glass fiber core, a polyimide coating layer, and a polyurethane wrapping layer that are stacked sequentially from inside to outside; the rebar is provided with a notch groove along a length direction; and the sheathing optical cable is embedded in the notch groove in parallel; the winding layer is wound around an outer surface of the rebar, and the winding layer is made of an epoxy resin composite fiber; and the tightening sheaths comprise a first tightening sheath and a second tightening sheath which are sleeved at two ends of the winding layer, respectively.

Steel fiber composite intelligent bar with sheathing optical cable embedded in inner core of rebar, and fabrication method thereof

A method for determining a compressive strength of compression-cast rubber fine aggregate concrete is provided. The method includes: first strength information of normal cast concrete, second strength information of corresponding normal cast rubber fine aggregate concrete, and third strength information of compression-cast rubber fine aggregate concrete; a target equation between a compressive strength of the normal cast concrete, a compressive strength of the compression-cast rubber fine aggregate concrete, the rubber substitution rate and a compression stress is constructed according to the first strength information, the second strength information and the third strength information; target parameters of the compression-cast rubber fine aggregate concrete are acquired, and the target parameters are inputted into the target equation which outputs a current compressive strength of the compression-cast rubber fine aggregate concrete. The compressive strength of the compression-cast rubber fine aggregate concrete can be accurately determined.

Method for determining compressive bearing capacity of compression-cast rubber fine aggregate concrete

A Carbon Fiber Reinforced Polymer (CFRP) concrete composite component with partitioned cathodic protection and an operation and maintenance method thereof are provided. The composite component includes multiple longitudinal reinforcements, in which a first area, a second area and a third area corresponding to underwater, splash and atmosphere are arranged along an extending direction of each longitudinal reinforcement, respectively; a first spiral rib, which is wound around the multiple longitudinal reinforcements in the first area; a second spiral rib, which is wound around the multiple longitudinal reinforcements in the second area; a third spiral rib, which is wound around the multiple longitudinal reinforcements in the third area; a concrete; a power supply, where the first spiral rib, the second spiral rib and the third spiral rib are connected with a positive electrode of the power supply, and the longitudinal reinforcement is connected with a negative electrode of the power supply.

CFRP concrete composite component with partitioned cathodic protection and operation and maintenance method thereof

Disclosed are an alkali-activated geopolymer coating, and a preparation method and use thereof. The alkali-activated geopolymer coating, is prepared by raw materials including the following components: an aluminosilicate mineral, an alkali activator, and a performance additive; wherein the aluminosilicate mineral comprises fly ash, slag, and metakaolin; the performance additive comprises a polymer powder, titanium dioxide, a silicone defoamer, and a water-reducing admixture; and a mass ratio of the aluminosilicate mineral, the alkali activator, and the performance additive is in a range of 100:(60-80):(4-15).

Alkali-activated geopolymer coating, and preparation method and use thereof

The present disclosure relates to an optimization method and system for hybrid FRP and steel bars. The optimization method includes: determining a cross-sectional bending bearing capacity, a maximum cross-sectional bending bearing capacity, and a minimum cross-sectional bending bearing capacity according to basic material parameters and a design value of a bending moment; determining whether the cross-sectional bending bearing capacity, the maximum cross-sectional bending bearing capacity, and the minimum cross-sectional bending bearing capacity meet a first preset condition; if yes, determining a maximum steel bar area according to the basic material parameters; determining a maximum ductility of a steel bar beam; determining whether the maximum ductility and the target ductility meet a second preset condition; if yes, determining a minimum steel bar area and a maximum FRP bar area according to the maximum steel bar area; and determining an actual steel bar area and an actual FRP bar area.

Optimization method and system for hybrid FRP and steel bars

The method includes: receiving a first message sent by a first application APP on a terminal device, where the first message includes a user agent UA; determining, based on the first message, a first address and a second address corresponding to the terminal device; and sending a second message to the first APP, where the second message includes the first address and the second address, and the second message is used by the first APP to first attempt to open a page corresponding to the first address after receiving the second message, and if the opening fails, open a page corresponding to the second address.

Address obtaining method and device

Disclosed is a method for preparing an uncalcined geopolymer-based refractory material. The method includes the steps of mixing a mineral powder, a fly ash, a metakaolin, and silicon carbide whiskers by ball milling to form a milled material; mixing the milled material with a sodium water glass solution and water to form a slurry; and curing the slurry to obtain the uncalcined geopolymer-based refractory material. The uncalcined geopolymer-based refractory material thus prepared contains a geopolymer matrix formed of the mineral powder, the fly ash, and the metakaolin and the silicon carbide whiskers embedded in the geopolymer matrix.

Uncalcined geopolymer-based refractory material and method for its preparation

An uncalcined geopolymer-based refractory material is provided, comprising a matrix of a geopolymer obtainable by polymerization of a mixture consisting of mineral powder, fly ash, and metakaolin; and SiC whiskers embedded in the geopolymer matrix. The material has excellent mechanical properties and high resistance to high temperatures and exhibits a ductile fracture mechanism instead of a brittle fracture mechanism.

The present invention provides an early warning device and a ductility control method for a prestressed FRP reinforced structure. By setting a tensioning screw, prestressed reinforcement can be converted into non-prestressed reinforcement when tensioning screw failure occurs, and the structure is still in a safe state. This can improve the bearing capacity and ductility of the reinforced structure, while the ductility can be controlled and designed, thereby resolving the problem of easy disconnection and brittle failure between the FRP and anchors, and greatly improving FRP utilization and structural safety.

Early warning device and ductility control method for prestressed FRP reinforced structure

An apparatus for identifying metal corrosion includes a metal test piece, a push button timer, a liquid tank, a support, two fixed pulleys, a traction cable, a weight and a vibration motor. The support and the first pulley are in a lower portion of the tank. The second pulley is above the first pulley. The test piece is fixed on the support and connected to a first end of the traction cable which sequentially winds around the pulleys with a second end outside the tank. The weight, on which the motor is fixed, is suspended at the second end. The timer is under the motor. A corrosion solution is added into the tank, and the vibration motor provides alternating stress. When the metal test piece is broken, the weight and the motor are dropped and pressed on the electronic timer to record breaking time of the metal test piece.

Apparatus and method for identifying metal corrosion

The present invention relates to the field of material determination or analysis, and provides a method of assessing drying depth of cementitious materials including the following steps: preparing a plurality of cementitious material specimens; drying the cementitious material specimens; conducting electrochemical impedance spectrum measurement on each cementitious material specimen; accordingly determining a model for analyzing the drying depth of the cementitious material specimen. The method of assessing drying depth of the cementitious material provided by the present invention takes the influence of the resistivity changes on the model into consideration, and the drying depth of the cementitious material is reflected and reckoned with regularly changes of the electrochemical parameters, not only increasing the accuracy but also saving much testing labor, time and cost.

Method of assessing drying depth of cementitious material

A cathode protection method of embedded CFRP anode for reinforced concrete structure includes the following steps. Provide a preformed groove with a predetermined shape and size in a surface of a protection area of a reinforced concrete body, and remove dust in the preformed groove. Provide a CFRP member on the surface of the protection area of the reinforced concrete body. Coat an electrical conductive adhesive material between side surfaces of the reinforcing column of the CFRP member and the preformed groove and between the reinforcing plate and the reinforced concrete body. Connect the CFRP member with a positive electrode of an external DC power supply and the steel reinforcing element with a negative electrode of the external DC power supply.

Cathode protection method and apparatus for reinforced concrete structure and composite structure and processing method for reinforced concrete structure

Provided is a ternary inorganic compound crystal having a molecular formula of CaAlPO, and a preparation method thereof comprising the following steps: weighing calcium salts, aluminum salts and phosphate respectively according to the molar ratio of calcium, aluminum and phosphorus in the molecular formula CaAlPO; calcining at 1550&#x2dc;1570&#xb0; C., cooling, and grinding to obtain the ternary inorganic compound crystal. Also provided is an application of the ternary inorganic compound in gelling materials and molecular sieves, nonlinear optical crystals, and photochromic materials.

Ternary inorganic compound crystal and preparation method and application thereof

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Guangdong, China

Feng Xing