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| COMPOSITE ELEMENT METHOD OF LIFT JOINT SIMULATION FOR ROLLER COMPACTED CONCRETE TEMPERATURE FIELD ANALYSIS |
| SU Peifang1，2，WENG Yonghong1，2，CHEN Shenghong3，LU Xingli4 |
| (1. Changjiang Institute of Survey，Planning，Design and Research，Changjiang Water Resource Commission，Wuhan，Hubei 430010，China；2. National Dam Safety Research Center，Wuhan，Hubei 430010，China；3. State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei 430072，China；4. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China) |
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Abstract The lift joint segments which distribute in the roller compacted concrete(RCC) are difficult to be simulated in the temperature field analysis. Based on the principle of composite element method(CEM)，the composite element model for temperature field of RCC is built. The preprocessor is simple and convenient and the lift joint segments are contained in the composite elements，thus the mesh generation of lift joint can be considerably simplified. The quantity of mesh can be easily controlled and the shape of mesh can be improved. The composite elements may contain sub-elements of arbitrary shape whose temperature can be interpolated from their corresponding mapped nodal temperatures. The temperatures in lift joint segments are calculated from mapped nodal temperatures of their neighboring sub-elements. In composite element method，the solving procedure of the mapped nodal temperatures is similar to that in conventional finite element method，and the elements containing no lift joint are degenerated to conventional finite elements automatically. The programs for composite element algorithm can be incorporated into the conventional finite element analysis procedure with intrinsic coherence. The comparative study between the composite element method and the conventional finite element method has been illustrated to verify the composite element algorithm for temperature of RCC.
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Received: 04 June 2013
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2014, Vol. 33 
