The seismic performance of reinforced concrete members under earthquake excitation is different from that of whole structures; collapse mechanism may occur because of severe damage to individual members, even if the structural damage is not significant. Therefore, the potential seismic damage of each member should be investigated specifically apart from that of overall structure. In this study, a global damage model based on component classification is proposed to analyze the structural damage evolution rule and failure mechanism; then, the computed damage is compared with the experimental phenomena of three 1/3-scale models of three-storey, three-bay reinforced concrete frame structures under low-reversed cyclic loading. In addition, a probabilistic approach is finally adopted to quantify the seismic performance of RC frame structures based on the proposed global damage model. Results indicate that the structures with lower vertical axial force and beam-to-column linear stiffness ratio still maintain a certain load-bearing capacity even when the interstorey drift angle exceeds the elastoplastic limit value and the cumulative damage of structures is mainly concentrated on the beam ends and column bottoms of the first floor at final collapse. Moreover, the structural failure probability at different performance levels would increase significantly if reinforced concrete frame structures suffer ground motions higher than the design fortification intensity, even up to eight times.

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The vibration reduction effect of high-position fire-fighting water tanks on the roof of office buildings in State Grid Corporation of China is discussed in this article. A three-dimensional tuned liquid damper(TLD for short)-structure model was established based on Coupled Euler-Lagrange algorithm to compare the calculated results under unidirectional and bidirectional seismic waves. Meanwhile, a 10-storey frame structure with asymmetric plane was selected to study the controlling performance of TLD on torsional response. Top displacement and aseismic ratio are taken as the key parameters to verify the availability, and the results show that the displacement response of TLD-structure has the character of linear-superposition geometrically, and the response gets the maximum when the seismic characteristic period tends to its natural period. The position with smaller structural stiffness should be taken as the primary controlling part, and reduction effect is better in the direction with strong displacement-response. TLDs have positive effects on controlling the structural torsional response and the aseismic ratio could reach 30% or more.

With the improvement of design requirements and computer technology, the three-dimensional design with multi-professional collaborative design, refined design and engineering digitization as the core, is being popularized and used in the substation engineering design of State Grid Corporation. This paper will use the three-dimensional software to deepen the design of prefabricated buildings, and refine assembly building design, embed pipeline and set openings reasonably, which would reduce the site labor input, shorten the construction period, and reduce the site construction risk, and improve the quality and technological level of engineering construction at the same time.