(TSO International Standard 7844 Grooved vertical ioints with connecting bars and concrete infill between large reinforced concrete panels Laboratory mechanical tests -. Effect of tangential loading Assemblagesverticaux crantesa armatures de liaisonetbeton couleen place entregrands panneaux enbetonarme-Methode d'essaimecaniqueenlaboratoire-SollicitationsrésultantdeI'applicationd'effortstangentiels Firstedition-1985-11-15 UDC 624.078.3:620.17 Ref.No.ISO 7844-1985 (E) Descriptors : buildings, joints, tests, specimen preparation, test specimens, test equipment, deformation, mechanical properties. Price based on 4 pages Foreword ISO(theInternational OrganizationforStandardization)is a worldwidefederationof national standards bodies (ISO member bodies).The work of preparing International Standards is normally carried out through iSo technical committees. Each member bodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7844 was prepared by Technicai Committee ISO/TC 59, Building construction. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other international Standard implies its latestedition,unlessotherwisestated. ? International Organization forStandardization,1985 Printed in Switzerland ISO7844-1985(E) INTERNATIONALSTANDARD Grooved vertical joints with connecting bars and concrete infill between large reinforced concrete panels Laboratory mechanical tests - Effect of tangential loading 0 Introduction Field of application The analysis of structures comprising large panels has shown This International Standard is applicable to vertical joints be- the importance of the role that can be played by vertical joints tween large wall-panels satisfying the following conditions : between wall elements. a) the edges of the panels shall have a geometric form Modern methods of calculation allow the influence of these which allows the infill concrete of the joint to play a role as a joints to be taken into account when sufficient knowledge of distributing mechanical wedge; their behaviour is available, and the purpose of this Interna- tional Standard is, therefore, to provide a method for the b)the reinforcement connecting the two wall-panels shalt experimental determination of the principal elements of the be distributed uniformly over the total height of the storey behaviour of some of these joints. and the vertical distance between reinforcing bars shall be small; This International Standard does not deal with the interpreta- tion or use of the test results. In particular, as these are tests c) the strength of the concrete constituting the panels which are often difficult to perform in large numbers, this Inter- shall be at least equal to the strength of the infill concrete of national Standard does not specify a minimum repetition fac- the joint. tor. Attention is drawn, however, to the dispersion which often affects the results of such tests and to the desirability of This International Standard is applicable in the case of effects repeating several times those tests which are most represen- produced by tangential loading (shearing along the joint). tative of the real conditions. The mechanical characteristics of vertical joints between rein- 3 Principle forced concrete panels which are taken into account in design calculations for bracing walls formed of large panels can be Submission of test pieces, comprising two side pieces of panels expressed by means of t