The Existing Civil Buidings' Appraisement Of Safety And Woks Application

The article analysises and studies the appraisal methods about the safty of existing civil buildings, especially on the buildings which are concrete structures and masonry structures. First, it introduces the studied developments of the appraisal methods to the building structures home and abroad, the present appraisal standard of the safty to the civil buildings, and the appraisal methods of the safty to the concrecte structure buildings and the masonry structure buildings; Next, with the works examples, according to the related requires in "the Standard of Dangerous Building Appraisal" (JGJ125-99), it analysises the works examples from the division of the component,the decision of the membership classes and the fuzzy affiliation of the whole building; Last, with the related parts of "Appraiser of Reliability of Civil Buildings" (GB50292-1999), it analysises some existing inadequates of "the Standard of Dangerous Building Appraisal" in the works applications.The study shows that in the Standard of Dangerous Building Appraisal, components just being sorted into dangerous point and safe point,membership dangerous classes of the building parts only being decided by the percent of the dangerous components, taken no account of the exact distribution and the degree of importance on the load path, will lead to faulted diagnosis. Meanwhile, when modeling for the evaluation of the whole building, such fixed weights as 0.3, 0.6 and 0.1 are utilized to weight the ground foundation, top burdening structure and maintaining structure, controversial principal-factor-decision fuzzy operators M(A, V) and max-subjection are adopted, which will result in faulted diagnosis, too.Finally, combining with the Standard for Appraiser of Reliability of Civil Buildings,the paper discusses the mentioned problems from the division of the component,the decision of the membership classes and the fuzzy affiliation of the whole building, and then gives the related improvinf suggestions, try to improve the reasonability of "the Standard of Dangerous Building Appraisal", to make it realitic meaning on sloving the appraisal questions, and with some economic benefit and social benefit.