9—demolition of concrete structures by heat

Ngày tải lên: 01/05/2014, 21:25

... book: Unified Theory of Concrete Structures, a giant step beyond the scope of Unified Theory of Reinforced Concrete The many challenging goals of this new book are made possible only by the collaboration ... of Concrete Structures The position of the unified theory in the scheme of structural engineering is shown in row of Table 1.1 The six model components of the unified theory are distinguished by ... study the damages in concrete structures, to assess causes and to recommend rehabilitation and future research Professor Mo is the author of the book “Dynamic Behavior of Concrete Structures (1994)...

Ngày tải lên: 07/06/2014, 00:49

... characteristics of a button head are influenced by the wire cutoff method, the type of heading equipment, the geometric characteristics of the head, the properties of the seating block, and the type of wire ... of the Fatigue Behavior of Concrete, Mortar, and Paste in Uniaxial Compression,” ACI JOURNAL, Proceedings V 67, No 6, June 1970, pp 461-463 11 Nordby, Gene M., “Fatigue of Concrete- A Review of ... “Effect of Component Elements of Deformation Patterns on the Fatigue Strength of Bar Reinforcement,” Experimental and Theoretical Investigations of Reinforced Concrete Structures, edited by A.A...

Ngày tải lên: 24/10/2014, 15:46

... Survey of Concrete in Service 228.1R In-Place Methods for Determination of Strength of Concrete EVALUATION OF STRUCTURES PRIOR TO REHABlLlTATlON 437R B-14 SP-85 Strength Evaluation of Existing Concrete ... Reinforced Concrete Structures, ” DA-24 Concrete Society, 1982, “Non-Structural Cracks in Concrete, ” Technical Report No 22, England Corps of Engineers, 1986, “Evaluation and Repair of Concrete Structures, ” ... shear stresses n concrete Low level of expertise required, can be used by field personnel Directly measures inplace strength of concrete; appears to give good prediction of concrete strength...

Ngày tải lên: 24/10/2014, 21:59

... rate of about 0.01 to 0.1% by weight of concrete per month in a marine splash zone and 0.001 to 0.01% by weight of concrete per month in a marine atmospheric zone In another study of marine structures ... Use of concrete – Part 1: Code of practice for design and construction) Determine the proportions of constituents of concrete mix corresponding to the grade of concrete Determine initial cost of ... Use of concrete – Part 1: Code of practice for design and construction) Determine the proportions of constituents of concrete mix corresponding to the grade of concrete Determine initial cost of...

Ngày tải lên: 08/11/2015, 17:33

Ngày tải lên: 26/04/2016, 08:46

Ngày tải lên: 29/05/2016, 17:51

Ngày tải lên: 12/10/2016, 18:39

Ngày tải lên: 08/12/2016, 22:48

... Tangent modulus of elasticity of normal weight concrete at a stress of σc = and at 28 days Ec,eff Effective modulus of elasticity of concrete Ecd Design value of modulus of elasticity of concrete Ecm ... Secant modulus of elasticity of concrete Ec(t) Tangent modulus of elasticity of normal weight concrete at a stress of σc = and at time t Ep Design value of modulus of elasticity of prestressing ... 1: Actions on structures EN 1992 Eurocode 2: Design of concrete structures EN 1993 Eurocode 3: Design of steel structures EN 1994 Eurocode 4: Design of composite steel and concrete structures EN...

Ngày tải lên: 09/12/2016, 17:11

... Basis of Structural Design Actions on structures Design of concrete structures Design of steel structures Design of composite steel and concrete structures Design of timber structures Design of ... specific heat of concrete [J/kgK] fck(θ) characteristic value of compressive strength of concrete at temperature θ for a specified strain fck,t(θ) characteristic value of tensile strength of concrete ... for moisture content of % of concrete weight cp.peak = 1470 J/kg K for moisture content of 1,5 % of concrete weight cp.peak = 2020 J/kg K for moisture content of 3,0 % of concrete weight And linear...

Ngày tải lên: 09/12/2016, 17:19

... modulus of elasticity of concrete Ecd Design value of modulus of elasticity of concrete Ecm Secant modulus of elasticity of concrete Ec(t) Tangent modulus of elasticity of normal weight concrete ... considered t0 The age of concrete at the time of loading u Perimeter of concrete cross-section, having area Ac u Component of the displacement of a point v Component of the displacement of a point or ... Compressive strength of concrete fcd Design value of concrete compressive strength fck Characteristic compressive cylinder strength of concrete at 28 days fcm Mean value of concrete cylinder compressive...

Ngày tải lên: 09/12/2016, 17:22

... on structures – Part 4: Silos and tanks EN 1992-1-1, Eurocode 2, Design of concrete structures – Part 1.1: General rules and rules for buildings EN 1992-1-2, Eurocode 2, Design of concrete structures ... the effects of creep by use of an effective modulus of elasticity for the concrete Informative Annex L provides a simplified method of assessing stresses and strains in restrained concrete members ... tensile strength of concrete at temperatures above normal may be obtained from 3.2.2 of EN 1992-1-2 (102) The modulus of elasticity of concrete may be assumed to be unaffected by temperature up...

Ngày tải lên: 09/12/2016, 17:26

... including the attachment of steel plates, enlargement of the current section with concrete, addition of external prestressing (PT) stressed by post-tensioning, and drilling in of additional steel ... high heat and humidity Half of the specimens are fabricated by VARTM and the other half by hand layup The ultimate strength and strain of specimens after conditioning is compared to that of control ... process on concrete structures Grooves sawed into concrete are believed to be able to accelerate the VARTM application time without diminishing the capacity of the final product Both of these assumptions...

Ngày tải lên: 12/05/2017, 22:37

Ngày tải lên: 23/05/2017, 22:14

... linkage is supported by an rOe between GalVIII H1 and NAc protons of GlcNAc VII Extension of the 6-branch is by a GalIVb1–4GlcNAcIII linkage, as GalIV H1 gives an rOe to H4 of GlcNAc III Gal IV ... is therefore usually achieved by using several different techniques, of which MS and NMR are two of the most powerful Previously, we demonstrated the distinction of chain type and blood-group ... the 4-position of the -3GlcNAc- (e.g in the case of an Lea determinant), a fragment at m/z 348 (202 +146) results, whereas if the 4-position is substituted by Gal (e.g in the case of an Lex determinant),...

Ngày tải lên: 19/02/2014, 12:20

... analysis of the complexes of Hsp273D with thermally denatured actin The complexes were obtained by heating of F-actin (0.5 mgÆmL)1) to 75 °C at a constant rate of C°Æmin)1 in the presence of 0.1 ... actin Fig Formation of the complexes of denatured actin with Hsp273D as studied by DLS (A) F-actin (0.5 mgÆmL)1) was heated at a constant rate of C°Æmin)1 in the presence of Hsp27-3D (0.125 mgÆmL)1), ... demonstrate that, upon heating, thermal unfolding of F-actin is accompanied by formation of stable, soluble complexes of Hsp27-3D with denatured actin that contain roughly equal quantities of denatured...

Ngày tải lên: 16/03/2014, 06:20

... correction of the spherical aberration of the objective lens leads to a spatial resolution of at least 0.1 nm The composition of the nanodeposits at the nanometer scale has been investigated by means of ... dispersion of 0.5 eV/channel was used for the quantification of the relative amounts of each element, with a collection angle of 24 mrad and a convergence angle of 7.5 mrad Both types of experiments ... first nanometers of the growth of the deposit, one can observe the presence of a pre-peak at 531 eV, which is characteristic of the presence of CoO As the probe scans the inner part of the deposit,...

Ngày tải lên: 20/06/2014, 22:20

... guess - announcement: the the meanings New words: (translation): Thông báo of the words from - - missing: (synonym of lost): Thất T's eliciting announcement: (n) Thông báo lạc Repeat in chorus ... missing: (adj) Thất - fair: (explanation): Hội chợ then individually lạc - an entrance: (synonymy of a door) - fair: (n) Hội chợ Lối vào - an entrance: Lối vào - a doll: (realia) búp bê Go to the ... has short dark Ask ss listen to the tape again to Listen to the tape hair check (v) the letter of correct picture again to check (v) Answer: to show Mary is wearing a: B: She is wearing Feed...

Ngày tải lên: 03/07/2014, 19:20