高層型鋼混凝土框筒混合結(jié)構(gòu)模型的靜力推覆分析
黃吉鋒 徐培福 薛彥濤
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(中國建筑科學研究院 北京 100013)［提要］ 利用彈塑性有限元分析方法，對一個帶轉(zhuǎn)換層的30層型鋼混凝土框筒混合結(jié)構(gòu)縮尺模型的擬靜力加載試驗過程進行了數(shù)值模擬。采用了纖維束模型的梁柱單元以及基于Darwin Pecnold正交各向異性非線性彈性混凝土本構(gòu)模型的平面應(yīng)力膜單元模擬結(jié)構(gòu)中的框架和剪力墻，介紹了有限元網(wǎng)格剖分、鋼梁與混凝土墻交接的半剛接處理以及樓板的考慮方式。與試驗數(shù)據(jù)的對比表明，數(shù)值模擬得到的結(jié)構(gòu)骨架曲線和樓層變形情況可以做到較為符合實際。［關(guān)鍵詞］ 彈塑性有限元分析 鋼混凝土混合結(jié)構(gòu) 擬靜力試驗Elastoplastic Numerical Simulation to Pseudo-static Test of High-rise Hybrid Structure/Authors:Huang Jifeng, Xu Peifu, Xue Yantao (China Academy of Building Research, Beijing 100013, China)Abstract:With the elastoplastic static analysis of FEM, a numerical solution is done to simulate the pseudo static test being carried out on the 1∶10 size reduced model of a 30 storied steel reinforced concrete frame corewall building structure with transfer story. The fiber model beam column element and the plane stress membrane element based on the Darwin Pecnold nonlinear elastic constitutive relations of concrete are adopted to model the frame and the corewall in the structure, respectively. The FEM mesh, the semi-rigid connections between the steel beam and the concrete wall and the consideration of the contribution of the slab are specially recommended. The results show that the backbone curves and the inter-storey deformation of the structure obtained from the numerical simulation can be well matched with the test data.Keywords:structural elastoplastic analysis of FEM; steel-concrete hybrid structure; pseudo static test
