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（中國建筑西北設計研究院，西安710003）

［提要］建筑震害調查和結構實測數據表明，某些工業(yè)與民用建筑的屋蓋和樓蓋平面內的抗推剛度是有限的，地震時產生了顯著的水平變形。對于此類半剛性樓蓋房屋，用于計算水平地震作用的振動模型不能再沿用僅適用于剛性樓蓋或柔性樓蓋房屋的串聯質點系。給出了半剛性樓蓋房屋的抗震空間分析方法，為計入樓蓋水平變形對質點水平地震作用數值和構件地震內力的影響，對于單向地震輸入和雙向地震輸入，分別提出串并聯質點系和雙向串并聯質點系振動模型，以計算結構的二維振型或三維振型以及相應的構件地震內力?？晒督ㄖ拐鹪O計規(guī)范》修訂時參考。

［關鍵詞］半剛性樓蓋房屋；樓蓋水平變形；串并聯質點系；雙向串并聯質點系

Aseismic Spatial Analysis of Buildings with Semi-rigid Diaphrams/Liu Dahai,Zeng Fansheng,Wang Min,Su Haitao(China  Northwest  Building  Design ＆ Research  Institute, Xi"an 710003,China)

Abstract:Seismic damage of buildings and surveying data of structures show that the stiffness of floorings is finite and the floorings have horizontal deformation during earthquake.For these buildings with semi-rigid diaphrams, the vibrational model for calculating the seismic action should not be based on series lumped mass system.The series-parallel lumped mass system and two way series parallel lumped mass system are adopted in order to calculate the twodimentional and three diamentional vibrational modes of structures during one-direction earthquake input and two directions earthquake input.

Keywords:building with semi-rigid diaphragms; horizontal deformation of flooring;seriesparallel lumped mass system; two way series-parallel lumped mass system