Compared with other template construction technology, jacking formwork system has the advantages of self-climbing, less operating personnel, good safety and good construction quality, with relatively innovative construction techniques and technology and has been widely used in the construction of tall buildings in recent years. The lifting principles and characteristics of jacking formwork were introduced in the paper. Based on the application in a tall building project, construction technologies of the formwork were introduced.
Jacking formwork system has been widely used in the construction of tall buildings and modularized low-position jacking steel platform formwork system is made up of several assembled and turnover subsystems, including steel truss platform system, steel columns supporting system, formwork and rack system, two-way-acting hydraulic jack and its control system.The paper described the application of the system in Fuzhou Yu Yang Central Golden Plaza Project and construction site monitoring were conducted. According to the site monitoring result, the performance of the jacking formwork system is further illustrated. In the end some suggestions were put forward to ensure construction safet .
Fire resistance design of Reinforced concrete wall is one of the important issues for structural safety. The sequentially coupled thermal-stress analysis method in ABAQUS software is used to calculate the fire resistance of walls. The results of a parametric study to examine the influences of parameters, such as axial load level, lateral load level, height-to-thickness ratio, wall thickness, material strengths, steel reinforcement ratio and concrete protection thickness to reinforcements on fire resistance of RC walls are presented.
The characteristics of integral forced prformance for seel tubular high scaffold with couplers were introduced and deficiencies were pointed out in the paper. Integral forced prformance for steel tubular high scaffold with couplers was simulated by finite element software ABAQUS. Couplers joint was simulated with nolinear elastic spring element model. Eigenvalue buckling analysis was used to get the most stability capacity. The simulated result agrees well with previous experimental result.
The bond characteristics between reinforcement and self-compacting concrete under dynamic loads was analyzed experimentally. The tests were conducted by pulling-out with setting strain gauge in reinforcment. The bond stress distribution laws were analyzed with concrete strength change.
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