1、Designation:C171712Standard Test Methods forConducting Strength Tests of Masonry Wall Panels1This standard is issued under the fixed designation C1717;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONEngineered design of masonry structures requires accurate technical data on the strength andload-deflection behavior of masonry wall elements.Th
3、ese test methods provide a systematic basis forobtaining such data.1.Scope*1.1 These test methods cover methods for determining thestrength and load-deflection characteristics of masonry wallelements.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parenthe
4、ses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 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 safe
5、ty and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C1232 Terminology of MasonryE2126 Test Methods for Cyclic(Reversed)Load Test forShear Resistance of Vertical Elements of the Lateral ForceResisting Systems for Bu
6、ildings3.Terminology3.1 DefinitionsTerminology defined in TerminologyC1232 shall apply for this specification.4.Significance and Use4.1 The test methods described in this standard are intendedfor use as a starting point in developing specific testingprotocols for masonry elements.4.1.1 The testing p
7、rotocols could be used for general re-search on the load-deflection behavior of masonry elements.4.1.2 The testing protocols could be used for qualification ofmasonry elements and materials by evaluation services andother parties.4.1.3 The test methods described in this standard aregeneral,and are i
8、ntended to be adaptable to address a widerange of anticipated support and loading conditions.4.2 How the test results are interpreted will depend on theintended use of the masonry element being tested.5.Test Specimens5.1 General DescriptionThe specimens shall have mate-rials and workmanship represen
9、tative of the structural elementsthey are intended to represent,and be large enough to be usefulin predicting the structural performance of those elements.5.2 Length or HeightThe specimen shall be long enough(for horizontal testing)or tall enough(for vertical testing)sothat its behavior under load w
10、ill simulate that of the elementthat the specimen is intended to represent.5.3 WidthThe specimen shall be wide enough so that itsbehavior under load will simulate that of the element thespecimen is intended to represent.5.4 Laboratory EnvironmentMaintain the air in the labo-ratory at a temperature o
11、f 75 6 15F(24 6 8C)and a relativehumidity of 55 6 25%.5.5 Preconditioning of Masonry MaterialsPreconditionmaterials by storing in the laboratory environment for at least5 days before use.5.6 AgeTest masonry construction at an age of at least 28days after fabrication,unless specified otherwise.6.Gene
12、ral Requirements for Instrumentation6.1 Load MeasurementMeasure loads with a load cell orpressure transducer having a precision better than or equal to1%of the expected maximum load.1These test methods are under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct re
13、sponsibility of SubcommitteeC15.04 on Research.Current edition approved Dec.1,2012.Published December 2012.Originallyapproved in 2009.Last previous edition approved in 2010 as C1717 010.DOI:10.1520/C1717-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Se
14、rvice at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959
15、.United States1 6.2 Displacement MeasurementMeasure displacementswith a linear potentiometer,linear variable displacement trans-former(LVDT),or dial gauge having a precision equal to orbetter than the lesser of 61%of the expected maximumdisplacement,or 60.02 in.(60.5 mm).6.3 Data AcquisitionRecord s
16、ufficient data to define theload-displacement curve with sufficient precision for the pur-poses of the test.Each set of data(load and displacement)isreferred to as a“loading point.”7.General Requirements for Loading7.1 Loading MethodLoad specimens hydraulically using ahand pump,electrical pump,or air-driven pump.7.2 Test ControlControl the load manually or automati-cally(servo-controlled feedback system).7.2.1 Manual ControlIf the load is controlled manually,displacements are imposed on the spec
