1、Designation:D719907(Reapproved 2012)Standard Practice forEstablishing Characteristic Values for Reinforced GluedLaminated Timber(Glulam)Beams Using Mechanics-BasedModels1This standard is issued under the fixed designation D7199;the number immediately following the designation indicates the year ofor
2、iginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers mechanics-based requirements forcalculating cha
3、racteristic values for the strength and stiffness ofreinforced structural glued laminated timbers(glulam)manu-factured in accordance with applicable provisions of ANSI/AITC A190.1,subjected to quasi-static loadings.It addressesmethods to obtain bending properties parallel to grain,aboutthe x-x axis(
4、Fbxand Ex)for horizontally-laminated reinforcedglulam beams.Secondary properties such as bending about they-y axis(Fby),shear parallel to grain(Fvxand Fvy),tensionparallel to grain(Ft),compression parallel to grain(Fc),andcompression perpendicular to grain(Fc)are beyond the scopeof this practice.Whe
5、n determination of secondary properties isdeemed necessary,testing according to other applicablemethods,such as Test Methods D143,D198 or analysis inaccordance with Practice D3737,is required to establish thesesecondary properties.Reinforced glulam beams subjected toaxial loads are outside the scope
6、 of this standard.This practicealso provides minimum test requirements to validate themechanics-based model.1.2 The practice also describes a minimum set ofperformance-based durability test requirements for reinforcedglulams,as specified in Annex A1.Additional durability testrequirements shall be co
7、nsidered in accordance with thespecific end-use environment.Appendix X1 provides an ex-ample of a mechanics-based methodology that satisfies therequirements set forth in this standard.1.3 Characteristic strength and elastic properties obtainedusing this standard may be used as a basis for developing
8、design values.However,the proper safety,serviceability andadjustment factors including duration of load,to be used indesign are outside the scope of this standard.1.4 This practice does not cover unbonded reinforcement,prestressed reinforcement,nor shear reinforcement.1.5 The values stated in SI uni
9、ts are to be regarded asstandard.The mechanics based model may be developed usingSI or in.-lb units.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health
10、practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D9 Terminology Relating to Wood and Wood-Based Prod-uctsD143 Test Methods for Small Clear Specimens of TimberD198 Test Methods of Static Tests of Lumber in StructuralSizesD905
11、Test Method for Strength Properties of AdhesiveBonds in Shear by Compression LoadingD1990 Practice for Establishing Allowable Properties forVisually-Graded Dimension Lumber from In-Grade Testsof Full-Size SpecimensD2559 Specification for Adhesives for Bonded StructuralWood Products for Use Under Ext
12、erior Exposure Condi-tionsD2915 Practice for Sampling and Data-Analysis for Struc-tural Wood and Wood-Based ProductsD3039/D3039M Test Method for Tensile Properties of Poly-mer Matrix Composite MaterialsD3410/D3410M Test Method for Compressive Properties ofPolymer Matrix Composite Materials with Unsu
13、pportedGage Section by Shear LoadingD3737 Practice for Establishing Allowable Properties forStructural Glued Laminated Timber(Glulam)D4761 Test Methods for Mechanical Properties of Lumberand Wood-Base Structural MaterialD5124 Practice for Testing and Use of a Random Number1This practice is under the
14、 jurisdiction of ASTM Committee D07 on Wood andis the direct responsibility of Subcommittee D07.02 on Lumber and EngineeredWood Products.Current edition approved Oct.1,2012.Published October 2012.Originallyapproved in 2006.Last previous edition approved in 2007 as D7199 07.DOI:10.1520/D7199-07R12.2F
15、or referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West
16、Conshohocken,PA 19428-2959.United States1 Generator in Lumber and Wood Products Simulation2.2 Other Standard:ANSI/AITC A190.1 Structural Glued Laminated Timber33.Terminology3.1 DefinitionsStandard definitions of wood terms aregiven in Terminology D9 and standard definitions of structuralglued laminated timber terms are given in Practice D3737.3.2 Definitions of Terms Specific to This Standard:3.2.1 bonded reinforcementa reinforcing material that iscontinuously attached to a glulam beam through a