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目前 ,我国建筑防倒塌验算是通过对罕遇地震作用下对薄弱层的层间弹塑性位移的验算来实现的。层间弹塑性变形是通过弹塑性时程分析和简化计算方法进行的。前者计算费机时 ,没能得到普遍应用 ,后者应用存在局限性。通过对框架结构最危险的倒塌模型———柱铰形侧移机构 ,对薄弱层的塑性变形通过塑性分析的虚功原理推求框架结构柱铰形侧移的计算方法 ,应用此计算方法对大连市两栋框架结构进行计算 ,其结果与弹塑性时程分析法结果基本相符。
At present, the anti-collapse checking of buildings in our country is realized through the checking of the interlayer elastic-plastic displacement of the weak layer under the rare earthquake. Elasto-plastic deformation is calculated by elastoplastic time-history analysis and simplified calculation. The former calculation of fees, failed to get universal application, the latter application has limitations. By means of the most dangerous collapse model of the frame structure --- column hinge side displacement mechanism, the plastic deformation of the weak layer is deduced by the virtual work principle of plastic analysis, and the calculation method of the frame side hinge deformation is deduced. City two frame structure calculation, the result is consistent with the results of elasto-plastic time-history analysis.