| Stone structure is a important part of masonry structure. It spreads all over the vast fishing villages and the areas in where overseas Chinese relatives of our country live, and it is suitable for all kinds of buildings. Stone structure has the development of long standing and occupies an important place in the Chinese and foreign building history. It is a rare specimen of stone-culture gem. It is always cherished, retained and expended by the broad masses of people because of its local materials, low costs and good taste, and the excellent characters in physics and chemistry. Thereby, it has formed the Chinese stone-civilization with flying its own colors.Stone structure is made from mortar and material stone. It has a kind of not-well-distributed netted structural system, where there are many mortar joints, and there are very much original crevice and hole in the joints. Which causes the plumpness of the mortar very poor and thus cuts down the earthquake-resistant and shear-resistant behavior of the structure. It is urgent need to take a emergency and effective earthquake-resistant improvement measure.Now, the natural stone is used wide-ranging. A vast amount of stone-powder is produced in the precision works and the powder has been a new and serious pollution source. It is in need of us to comprehensive harness and use the powder.After a host of investigation and full demonstration, and based on grout mortar and quasi-dynamic shearing tests, a new type grout material which takes stone-powder as forestry logging is presented at the first time for earthquake-resistant improvement of stone masonry structure. The results of turned waste into treasured object and environmental protection and take precautions against natural calamities have been reached.In this paper, the concept of a compounded mortar and the calculating method of its strength grade is advanced also at the first time. The shearing strength destroy mechanism of grout stone structure is brought to light and the formulas for calculating shearing strength is set up. The method and steps for checking earthquake-resistant and shear-resistant strength of grout stone structure are put forward. At the same time, the randomness and fuzziness of earthquake intensity, and the fuzziness of structural destroy grades are elaborated in this paper. Also the method for analyzing the fuzzy reliability of grout stone structural earthquake-resistant and shear-resistant has been put forward.By means of test and analysis of engineering example, the results made clear that the grout improvement method for stone structure is economical and reasonable, is convenient and workable. The effect is marked. Alter grouting the structures has considerable strength reserve and sufficient reliability. In this paper, the study to grout and improvement stone masonry structures is significant for earthquake relief work and environmental protection, and carrying forward the Chinese stone-culture. |
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