Experimental And Theoretical Investigation Of The TRC Insulation Sandwich Composite Wall

The framework of steel grid structure is known and used by more and more people because of its advantages of energy saving, environmental protection, anti-seismic performance and convenient construction in recent years. But the research of the enclosure system of the structure is immature, which is one of the most important factors of slow development. Textile reinforced concrete(TRC) composite wall, which has advantages of high bearing capacity and toughness, corrosion resistance, thermal insulation, light weight and magnetization preventing, is one type of well new materials for the enclosure system of theThe framework of steel gridstructure. So researching the mechanical properties of the TRC composite wallboard has great importance for the application in practical engineering. TRC consist of self-compacting concrete whose maximum aggregate size is 1.2mm and alkali-resisting glass fiber textile which is placed along with the principle stress, which can largely increase the bearing capacity of the composite material.In this paper the lightweight thermal insulation composite board whose face plate is TRC sheet and center ply is thermal insulation material is researched by the experiment of bending capacity, and the finite element model of the board is established by ANSYS to discuss its flexural behavior under different conditions based on comparing with the experimental results.The main methods of this work are as follows:1. Four points bending tests of five wallboards are respectively finished and the cracking load, ultimate bearing capacity, strain of different materials and mid-span deflection of the boards are determined under concentrated load. Load-deflection curve of the whole board is drawn and emergence and development of board cracks is recorded in the process of the experiment.According to the test results bending capacity of the whole board is improved with the increase of rate of network, and the flexural behavior of the whole board is enhanced with the increase of shear stiffness of the core material.2. Finite element model of the TRC thermal insulation composite board, which is established by finite element software ANASYS, is analyzed by choosing appropriate constitutive relation, yield criterion, failure criterion, element types and boundary conditions under concentrated load on two points. Process of experiment of the boards during the elastic deformation phase is simulated under different influencing factors and the results are compared with the experimental one, which shows that the differencebetween simulated results and experimental one is very small.3. The influence of thickness of the face plate on the flexural behavior of TRC composite board is analyzed by finite element software ANASYS. It concludes that the flexural performance of the TRC thermal insulation composite board is enhanced with the increase of thickness of surface course.