Study On Deformation Behavior And Carrying Capacity And Reliability Of The Aluminum Formwork And Falsework System

The concept of“Green-construction”has gained widely attention when thehigher construction quality has been put forward. The wooden formwork will beeliminated by other new energy-saving, environmental friendly, green andcleaning products for its poor construction quality and wood-consumption.Aluminum formwork attracts more eyes from engineers by these excellentproperties mentioned above. Aluminum formwork system has developed forseveral decades, and its supporting technology is relatively mature in foreign.Since it appeared not long in China, few people know it fully.This thesis gives a short presentation to this new type of formwork andfalsework, including the type, composition, advantages and disadvantages. It isthe increase of number of use that plays an important role in exerting itssuperiority. And study how to improve the rate of reuse of the aluminumformwork from the aspect of development, design, construction andmanagement.Through the single broad test and ABAQUS numerical simulation, the staticproperties of aluminum formwork system under the construction load has beenstudied. The result of the test chimed in with numerical simulation. Thedeformation behavior of whole model of formwork and falsework has been set upcomparing with the the actual measurement. From the reliability point aspect, byconsidering the different reinforced variables of aluminum formwork, includingthe calculate length of back ridge, the space of pull screw, and thickness of thewall, the reliability's influence factors on the plane deformation of outsideplane of the concrete wall has been analyzed by Monte Carlo method. In thisprocess, the Matlab has been used.This thesis gives a theoretic derivation on the carrying capacity of thevariable section single column. The characteristic equation has been obtained.Through the numerical analysis of static performance of aluminum for mworkunder the construction load, we get the conclusion that we can improve thestability of the single support aluminum formwork system when the floor heightexceeds3.2m. We get the features of co-working between formwork andfalsework. Field tests brings out that the semi-rigid turnover of the node willdecrease with the increase of the number of use. In Midas/gen, we get thebuckling model of the steel full support whose direction points at the first model.The ultimate capacity of the aluminum formwork full-support system has been analyzed, and the impact of the parameters except for the erection of factors,including the nodes semi-rigid and wall thickness, by considering the geometricand material nonlinearity. The progress of reuse of the steel-bracket has beensimulated by increasing the initial defect, and then the change of thesteel-bracket's ultimate capacity has been obtained. With the use of timesincrease, the carrying capacity of it will decrease gradually.The method of using equivalent horizontal forces to sumilate the the initialdefect. By setting the function of capacity limitate statement, the reliability ofreuse of full support has been studied by using Monte Carlo method. In thecourse of repeated turnover, the reliability of full-bracket's bearing capacitylimit state will gradually decrease. Engineers need to treat differently on the oldsteel support frame.