Early age thermal stress analysis of concrete

... Early age thermal cracking of concrete The goal of this chapter is to provide brief review of preceding work on early age thermal cracking of concrete and study the importance of early age material ... devised to measure the thermal properties of concrete at early- age This method provides for the continuous measurement of early- age thermal prope...

Ngày tải lên: 04/10/2015, 17:07

... Early age thermal cracking of concrete The goal of this chapter is to provide brief review of preceding work on early age thermal cracking of concrete and study the importance of early age material ... devised to measure the thermal properties of concrete at early- age This method provides for the continuous measurement of early- age thermal prope...

Ngày tải lên: 05/10/2015, 19:01

... Bureau of Reclamation; Design of gravity dams: Design Manual for Concrete Gravity Dams; Denver, Colorado; 1976 R A MIR and C A TAYLOR An investigation in to base sliding response of rigid gravity dams ... downstream sliding of rigid concrete gravity dams subjected earthquake loads The main menu of DAS program is showed in figure Figure The main menu o...

Ngày tải lên: 21/07/2014, 17:20

... 4 .10 : XTEM image of Sample B annealed at 10 00°C in forming gas (10 % H2 + 90% N2) for 15 minutes Figure 4 .11 : XTEM image of Sample C annealed at 800°C in forming gas (10 % H2 + 90% N2) for 15 minutes ... image of Sample A annealed at 800°C in forming gas (10 % H2 + 90% N2) for 15 minutes Figure 4.3: XTEM image of Sample A annealed at 900°C in forming gas (10 % H2 + 90...

Ngày tải lên: 14/09/2015, 14:04

... comparison of the growth of Ge nanocrystals in silicon oxide and HfAlO matrices - 1 02 - Chapter 5 .2 Results & Discussions II Ge nanocrystals in HfAlO matrix In order to synthesize the Ge nanocrystals in ... almost insoluble in silicon oxide [20 ,21 ], whereas it has been found that thermal processing of HfO + Ge systems can lead to the formation of hafnium germ...

Ngày tải lên: 14/09/2015, 14:04

... annealed for 15 inset is the typical Raman spectra of as-grown and Ge nanocrystals nanocrystals of annealing minutes The free standing As mentioned in Section 4 .3, Figures 4.8 and 4.11 show that, ... a tensile stress will result in an increase in the lattice spacing and, hence, a decrease in the wavenumber of the vibrational mode In the case of compressive stress,...

Ngày tải lên: 14/09/2015, 14:04

... competing factors which will influence the stress state of the nanocrystals in dielectrics, one is the capping effect and the other is temperature-dependent intrinsic tensile strain of SiN film ... atoms and therefore the growth of the nanocrystals In addition, it is interesting to note from the inset of Figure 7.1 (e), unlike the nanocrystals of the RTA sample shown...

Ngày tải lên: 14/09/2015, 14:04

... discussed in the following sections 8.4 Synthesis of Ge nanocrystals in U-shape groove In order to minimize the shadowing effect and make a relatively conformal film deposition, the KOH etching process ... bottom of the groove (i.e 70.6°) as comparing to the one of the corner of the mesa (i.e 144.7°) This difference in the arriving angle will inevitably cause the shadowi...

Ngày tải lên: 14/09/2015, 14:04

... the two rings are constantly in contact and as the concrete ring dies, strain gages monitor the steel ring strain In the finite element analysis the strain information was used as input using the ... the ring specimens using ANSYS software were modeled by cubic threedimensional as shown in Fig The elements of steel ring and concrete ring are continuous at nodes...

Ngày tải lên: 21/07/2014, 17:21

... and type of coarse aggregate on the autogenous shrinkage and drying shrinkage of high- performance concrete, and to establish a relationship between the autogenous and total shrinkage of concrete ... on the drying shrinkage of concrete, and Swayze (1960) showed that higher shrinkage of cement paste does not necessarily 16 Chapter Literature Review mean higher shrinkage of...

Ngày tải lên: 04/10/2015, 17:07

... and type of coarse aggregate on the autogenous shrinkage and drying shrinkage of high- performance concrete, and to establish a relationship between the autogenous and total shrinkage of concrete ... on the drying shrinkage of concrete, and Swayze (1960) showed that higher shrinkage of cement paste does not necessarily 16 Chapter Literature Review mean higher shrinkage of...

Ngày tải lên: 05/10/2015, 19:00

... immunoglobulin chains were also found to be significantly increased in aged thymocytes Understanding the changes in gene expression in thymocytes with age may hold the key in determining thymocyte fate ... the increased levels of many of these genes identified in the array analysis Moreover, Western blot analysis of thymocyte lysates also confirmed that IgM increas...

Ngày tải lên: 03/11/2012, 11:35

... surface of cross section -118- 900 21 50 21 50 27 5 D2 D1 1700 25 0 P 325 P 1800 1700 100 520 0 Beam s A1 and A2 21 50 21 50 900 27 5 P D2 D1 1700 1800 375 325 P 1700 520 0 Beam s B1 21 50 21 50 900 27 5 D1 D2 ... e2θ ; * v1 = v1 ; * v2 = v2 ; θ 1* = θ ; * 2 = 2 ; where e1 and e2 are the eccentricities of cable at the deviators and 2, respectively -114- (6.7) u2*,v2*,θ 2* Ca...

Ngày tải lên: 07/11/2012, 11:04

... [K 11 ] 1 ({ΔF1 } + {R1 } − [K 21 ]{ΔU }) (2.22) {ΔF2 } = [K 22 ]{ΔU } + [K12 ]{ΔU } − {R2 } (2.23) K 12 ⎤ K 22 ⎥ ⎦ ⎧ ΔU ⎫ ⎬ ⎨ ⎩ΔU ⎭ (1) ⎧ ΔF ⎫ ⎧ R ⎫ = ⎨ 1 +⎨ 1 ⎩ΔF2 ⎭ ⎩ R2 ⎭ ⎡ K 11 ⎢K ⎣ 21 Solving ... (3 .18 a) 12 K 6K 12 K 6K ⎤ ⎡ ⎢0; − L3 ; − L2 ; 0; L3 ; − L2 ⎥ ⎣ ⎦ 12 K 1+ L2 (3 .18 b) ⎡ 12 ⎛ 12 K ⎞ 6 12 ⎛ 12 K ⎞ ⎤ 0; − + x; ⎜ − − ⎟ + x; 0; − x; ⎜ − ⎟ + x⎥ ⎢ L⎠ L ⎦ 12 K L...

Ngày tải lên: 07/11/2012, 11:04

... “ Temperature Distribution of Heat Sink” Under Design Study and Analysis, make sure that Transient_ Analysis is selected Note that Transient_ Analysis is the name of analysis previously given Click ... option, and click OK -> Done 27 Create a Steady State Thermal Analysis From Analysis pull-down menu, select Mechanica Analyses/Studies From File pull down menu, selec...

Ngày tải lên: 19/01/2014, 05:20