An Experimental Study On The Flexural Behavior Of Full Lightweight Shale Ceramsite Concrete Prefabricated Walls Under The Flexible Connection

The lightweight shale ceramsite concrete replaces sand and gravel in ordinary concrete with shale ceramsite and shale pottery.It has the advantage of lightweight and high strength.The assembly of enclose wallplate not only enable the components to be standardized,but also reduces pollution and waste of resources.The most critical issue in the application of wall to prefabricated structure is the connection of nonstructural component to the main structure.Although the specifications require the use of flexible connections,no specific constructions and requirements were given.Therefore,A flexible connection method of embedded point supported wall was designed.An experimental study on the flexural behavior of eight full lightweight shale ceramsite concrete prefabricated walls under the flexible connection.The main work is as follows:(1)An experimental study on the flexural behavior of eight full lightweight shale ceramsite concrete prefabricated walls under the steel(angle)flexible connection.The main research parameters are the node position,the number of nodes and whether the Window is opened.These load-deflection curve,load-strain curve and ultimate bearing capacity of members was systematic analyzed.Record the crack development and draw the damage pattern of the wallboard.(2)The test results show that every walls under flexible connection meets the normal use requirements in a 100 m height building.The nodes of four point supported wall moderate internal displacement can improve the flexural capacity of the wall.Since the number of nodes was increased from four to six or more,the flexural capacity of the wall was improved and the deformation capacity was reduced.The wall with window or door was encrypted by the reinforcement at the edge of the hole weakens the adverse effect of the hole.(3)The four point supported walls is more suitable for practical engineering.because it has good ductility and load carrying capacity.In order to facilitate engineering application,a safety calculation formula was given for the node position of the four point supported walls.On this basis,10 models of four-point wall with different point positions were analyzed.The results show that the position of the node moved from the end to the inside in the wall size of this paper,the bearing capacity is continuously improved and the ductility is continuously reduced.(4)A finite element calculation model was established for a four point supported wall to verify the correctness of the model.The optimal node position obtained by the simulation is consistent with the calculation formula.(5)Combined with the test results,the engineering application suggestions for the shale ceramsite concrete prefabricated wall were proposed,including the design and manufacture of the wall,the design of the nodes and the key points of the engineering construction.Two suggestions were proposed in order to avoid the occurrence of cracks at the nodes.