Stress Test Technology Of Section About Stone Arch Bridge

In this paper, stone arch bridge and section of the force characteristics of the stress detection methods, carried out a large number of analysis and study。And on this basis, designed and manufactured stone structure model, Materials, respectively stone, mortar and masonry structure of the test analysis and experimental research, made the following main understanding and results.①Stone structure at a certain normal stress level showed flexible working characteristics. The integrated elastic modulus (E) depends not only on material Stone elastic modulus (EC), mortar material modulus of elasticity (ES), also with the scope of analysis within the two kinds of materials, geometric dimensions or volume (m) related to the "partial integrated elastic modulus" E = f (EC, ES, m) , When the analysis of masonry materials, the number of objects is large enough (m→∞), its "elastic limit of a comprehensive model" from stone and mortar materials depends primarily on the material elastic modulus (or label), that E = f(0 )(EC, ES).②Stone structure in eccentric compression loads, the cross-section deformation law can basically meet the plane-section assumption.③Through the stone structure of the model test to verify directly in the stone material bonded strain gauge, the measured strain value multiplied by the modulus of elasticity material Stone (EC) converted into cross-section stress approach is feasible and reliable.④Through research that, according to design specifications of the theoretical calculation of the stone arch bridge, full bridge materials stone and mortar in accordance with two kinds of materials, set to take an integrated elastic modulus and this paper, the "elastic limit of an integrated model" (E0) is the corresponding, can be used as test for detection of the theoretical calculation parameters, but the stress test should be in accordance with "local integrated elastic modulus" E = f (EC, ES, m) calculation. Good and accurate way is to test the cross-section single-stone material stress, at this time E = f (EC, ES, 0) = EC, the test strain can be multiplied by the modulus of elasticity material Stone (EC) obtained experimental stress.⑤This study in depth, the model number is still less than the experiment, the results of the research is still awaiting further verification and validation, in particular, the author believes that the future needs to a greater number of test cases through the establishment of mortar compressive strength and between the elastic modulus relationship. Masonry under the action of dynamic load elastic modulus and the complex stress state under the elastic modulus value remains to be further studied.