GB/T 9966.10-2021Test methods for natural stone—Part 10: Determination of resistance to shaking for individual stone anchoragest (English PDF)

Foreword

GB/T 9966 "Test Methods for Natural Stone" consists of 18 parts.

Part 1: Compression strength test after drying, water saturation, and freeze-thaw cycles;

Part 2: Bending strength test after drying, water saturation, and freeze-thaw cycles;

Part 3: Water absorption, bulk density, true density, and true porosity tests;

Part 4: Abrasion Resistance Test;

Part 5: Hardness Test;

Part 6: Acid Resistance Test;

Part 7: Strength Test of Stone Hanging Component Assembly Unit.

Part 8: Test Method for Structural Strength Testing of Stone Hanging Systems Using Uniform Static Pressure Difference;

Part 9: Determination of dynamic elastic modulus by measuring the fundamental resonant frequency;

Part 10: Determination of the seismic performance of the hanger assembly unit;

Part 11: Determination of Accelerated Aging Strength Due to Rapid Cooling and Heating;

Part 12: Determination of Static Modulus of Elasticity;

Part 13: Determination of capillary water absorption coefficient;

Part 14: Determination of fracture resistance energy;

Part 15: Determination of Salt Spray Aging Resistance;

Part 16: Determination of the linear thermal expansion coefficient;

Part 17: Determination of Salt Crystallization Strength

Part 18: Lithofacies Analysis.

This part is Part 10 of GB/T 9966.

This section was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 9966 specifies the principle, test equipment, specimen preparation, and testing procedures for the seismic performance test of a single stone hanging component unit. Test procedures, test results, and test reports.

This section applies to the determination of the seismic performance of individual hanging components of dry-hanging natural stone.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the version cited applies to this document. For any undated referenced document, the latest version (including all amendments) applies to this document.

GB/T 5574 Industrial Rubber Sheets

GB/T 9966.7 Test methods for natural stone - Part 7: Strength test of stone hanging assembly units

GB/T 17670 Unified Numbering System for Natural Stone

3 Principles

By continuously loading and unloading a specified load on a single component assembly unit, the performance of the component assembly unit after 100,000 loading and unloading cycles was measured.

The seismic performance of individual mounting units is assessed by examining changes in appearance and mounting strength.

4 Test Equipment

5 Sample Preparation

5.1 The stone sample should be 300 mm ± 1.0 mm in length, 300 mm ± 1.0 mm in width, and the thickness should be the actual thickness used; the stone sample should not have any defects. Defects affecting strength, such as cracks, missing edges, and chipped corners, are removed; slots or holes are machined according to actual usage requirements; each group of samples consists of 10 pieces, of which 5 are used as reference samples.

5.2 The hanging parts are the actual hanging parts used in the project, with a quantity of 10 pieces.

5.3 According to the actual requirements of the project, the stone and the hanging parts are combined into a hanging part unit, and the dry hanging adhesive is cured under laboratory conditions.

6 Experimental Procedure

6.1 Fix the five test samples onto the seismic test bench and clamp them securely. Rubber pads should be placed between the clamps and the stone. The load is then fixed onto the hanger. The component assembly unit is intermittently subjected to a vertical tensile force or compressive force of 200N ± 2N, with a total of 100,000 cycles. The tensile or compressive force used in the test should be determined according to the type of accessory, selecting the weakest point. After the test, observe and describe any changes in appearance, and whether the accessory has become loose or fallen off.

6.2 Place 5 test samples and 5 reference samples in distilled water at 20°C ± 2°C for 48 hours, then remove them and rinse with a wrung-out wet cloth. Wipe the moisture off the sample surface with a towel.

6.3 Fix 5 test samples and 5 reference samples on the platform respectively, and test the unit mounting strength of the pendant assembly according to the test method specified in GB/T 9966.7.

6.4 Record the maximum load at failure, accurate to 10 N, and describe the failure state.

6.5 Use vernier calipers to measure the dimensions of the damaged parts of the sample, such as groove width, groove depth, hole diameter, and hole depth, accurate to 0.1 mm.

7 Test Results

Seismic performance is calculated according to formula (1). […]

8 Test Report

The test report should include at least the following information

a) The commercial name of the stone as specified in GB/T 17670;

b) Sample quantity, specifications, surface finish, type, model, and specifications of the hangers, and type and model of the dry-hanging adhesive.

c) The name and address of the laboratory where the test was conducted; if the test was not conducted in a testing laboratory, the location of the test should be noted.

e) The specimen is subjected to either a horizontal or vertical loading method;

f) Changes in the seismic appearance of each test sample;

g) The maximum destructive load and failure state of each test specimen;

h) The maximum destructive load and failure state of each reference sample;

i) Average maximum destructive load of the test sample and the reference sample, in N;

j) Seismic performance,%.