运用随机振动的时域复模态分析方法, 对砌体结构房屋基础隔震体系在平稳随机地震激励情形下的响应进行了分析, 得出隔震结构体系的地震反应统计特征。

以长沙某高层框架结构办公楼及一通讯用铁塔为研究对象，采用非线性时程分析法分析了办公楼在屋顶加设铁塔前后的振型、自振周期、内力及位移等变化，针对目前在建和已建建筑物屋顶加铁塔的设计提出了较为合理的设计方法及值得注意的问题，其结论对屋顶增设铁塔的设计有一定的参考价值。

Strengthening of concrete members using steel plates is a well known and an extensively applied technique. Fibre reinforced polymer (FRP) composites have been established as an alternative method for rehabilitation and strengthening of concrete structures. In this project, reinforced concrete (RC) beams had been externally strengthened with glass fibre reinforced polymer (GFRP) sheets. In order to investigate the load capacity and member failure by altering the number of bonded layers (two or four), a series of static tests was carried out. Results show that, by the use of U-jackets, the deflection is reduced and the load capacity of the member is increased up to four times compared with the conventional RC beams. Two failure modes were observed; failures of the GFRP close to the mid-span area (when 2-layers GFRP had been used) and a shear failure between the GFRP sheet and the concrete surface at the end of the beams (when 4-layers were used).

A new type of composite column, i. e. structural steel and concrete-filled steel tube (SCFT), was proposed. In the composite column, structural steel was embedded in concrete-filled steel tube (CFT). The mechanics of the composite columns were analyzed, including stresses, strains of concrete, steel tube and structural steel, and buckling of steel tube. The results show that the column has higher bearing capacity and excellent ductility. The ultimate bearing capacity and ductility of the column decrease with the increase of slenderness ratio. The strength of concrete depends on extremely the thickness of steel tube and sizes of structural steel. The distribution of strength of concrete varies with position in cross section even at the same load. Based on above analysis, formulas for predicting the strength of concrete and ultimate bearing capacity of the composite columns are suggested.

More and more isolators are widely used all over the world. For a structure with isolator between base and super-structure, it is suitable to take only the first-mode in consideration for the super-structure, the structure become a 2-DOF system, and its damping and stiffness matrices are non-symmetrical. The equation of motion cannot be decoupled by the mode-superposition method. A complex-mode method is proposed and analytic expressions are obtained under earthquake excitation in the paper. Base on above analytic expressions suggested by authors, an isolator index β(the ratio of the standard deviation of the displacements at the top of super-structure), an optimal design process and some useful data are achieved. All of these are meaningful in practice projects.