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With the booming of construction and property industries in China, the demand for high-rises and mega-scale buildings with more integrated building functions, open- and tailor-shaped outlooks, better connections to municipal infrastructures, and higher grades of building importance has been increasing in the past two decades. The seismic design and...
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Context 1
... Option 3 was selected to be the outer moment frame of the tower structures with a relatively low cost, controllable constructability and reasonable building func- tions. Fig. 5(a) shows the structural frameworks of the tower structures. Main structure has been topped up last year, and Fig. 6 shows the site construction of the main structure. It was demonstrated that 5-day-cycle is achiev- able with the adopted structural ...
Context 2
... of con- ventional modular design, and work on three-dimensional platform. Nowadays, more free-form tailor-shape building skins are able to be achieved in a more creative way. Struc- tural engineer shall equip themselves with three-dimen- sional design technology, and produce structural frame- works well suits the building skins. As shown in Fig. 5(b) for RCH, structural members are tailored to support the facade outer skin, and form the modern outlook of the building. Both the structural engineer and main contractor work collaboratively on a three-dimensional platform to establish the setting out information on ...
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Citations
... CivilEng 2024, 5 328 can perform better and ensure greater safety during and after earthquakes. According to Wang (2016) [4], seismic design evolution for civil engineering structures has seen advancements in high-performance structural materials like high-strength concrete and steel, as well as high-performance structural components such as steel-reinforced concrete columns, concrete-filled steel tubular columns, concealed steel shear walls, and steel plate shear walls. Progress has also been made in developing high-performance structural systems such as the tube-in-tube system and the frame-tube bundle structure system. ...
The intriguing rocking behavior of foundations has attracted the attention of both researchers and professionals, owing to its beneficial characteristics such as energy absorption and self-adjusting capability. This paper offers a thorough examination of various modeling techniques, seismic performance evaluation methods, and the practical application of innovative rocking shallow foundations. While conventional fixed-base designs can absorb seismic energy, they often suffer from lasting damage due to residual deformation. In contrast, rocking foundation structures facilitate controlled rocking movements by loosening the connection between the structure and the foundation, thereby enhancing overall stability. Historical studies dating back to the 19th century demonstrate the effectiveness of rocking foundations in reducing seismic impact and ductility demands, leading to cost savings. Furthermore, this paper extends its focus to contemporary considerations, exploring modern modeling techniques, seismic performance assessments, and practical applications for rocking shallow foundations. By highlighting their role in improving structural resilience, this study investigates seismic hazard analysis, geological factors, and site-specific conditions influencing foundation behavior. It covers essential aspects such as dynamic responses and modeling methodologies, drawing insights from real-world case studies. Through a comprehensive review of both numerical and experimental investigations, the article provides a synthesis of current knowledge and identifies avenues for future research.
... Performance-base seismic design approach was adopted to analyze the structure (Wang, 2016), including both static and dynamic elasto-plastic analyses under various levels of wind, earthquake and gravity actions. Structural analysis software of both ETABS (2010) and ABAQUS (2004) were adopted to conduct the global structural analysis and counter-check the results with each other. ...
This mixed-use Raffles City (RCH) development is located near the Qiantang River in Hangzhou, the capital of Zhejiang province, located southwest of Shanghai, China. The project incorporates retail, offices, housing, and hotel facilities and marks the site of a cultural landscape within the Quianjiang New Town Area. The project is composed of two 250-meter-tall twisting towers with a form of vibrant waves, along with a commercial podium and three stories of basement car parking. It reaches a height of 60 stories, presenting views both to and from the Qiantang River and West Lake areas, with a total floor area of almost 400,000 square meters. A composite moment frame plus concrete core structural system was adopted for the tower structures. Concrete filled steel tubular (CFT) columns together with steel reinforced concrete (SRC) beams form the outer moment frame of the towers' structure. The internal slabs and floor beams are of reinforced concrete. This paper presents the engineering design and construction of this highly complex project. Through comprehensive discussion and careful elaboration, some conclusions are reached, which serve as a reference guide for the design and construction of similar free-form, hybrid, mix-use buildings.
There is a large literature on U.S. cities measuring the extent and stringency of land-use regulations and how regulatory and geographical constraints affect important outcomes such as housing prices and economic growth. This paper is the first to study the global extent and impact of regulatory and other constraints by estimating what we call building-height gaps. Using a novel data set on the year of construction and heights of tall buildings around the world, we compare the total height of a country’s stock of tall buildings to what the total height would have been if supply was more elastic, based on parameters from a benchmark set of countries. These gaps are larger for richer countries and for residential buildings than for commercial buildings in such countries. The gaps are driven by under-building in central areas of larger cities. These gaps are not compensated by tall building construction in peripheral areas of cities or less stringent limits on outward expansion beyond the existing boundaries of the cities. Countries with older, historic structures have larger gaps, likely due to more stringent height regulations and dispersed ownership that inhibits land assembly. Lastly, the gaps correlate strongly with international measures of housing prices, sprawl, congestion, and pollution.
The use of energy dissipaters for creation of earthquake‐resilient buildings has been paid more and more attention in recent years, and some newly developed structural fuses or dampers have been proposed to be employed in rocking and seesaw buildings. In this study, a new type of yielding‐based dampers, called curved‐yielding‐plates energy dissipater (CYPED), is introduced. CYPEDs are installed at the bottom of rocking or seesaw building's circumferential columns at the lowest story and have hysteretic behavior in their deformation occurring in vertical direction. The initial curvature of the yielding plates prevents them from buckling and gives the device a smooth force–deformation behavior. First, by performing a set of cyclic tests on three specimens of CYPED, their hysteretic force–displacement behavior was investigated. Then, to show the efficiency of this energy dissipating device in reducing the seismic response of buildings, they were employed numerically as multilinear plastic springs in the computer models of a sample seesaw steel building, and a series of nonlinear time history analysis (NLTHA) were performed on both seesaw building and its conventional counterpart. Results of NLTHA show that the proposed seesaw structural system equipped with appropriate CYPEDs not only gives the building a longer natural period, leading to lower seismic demand, but also leads to remarkable energy dissipation capacity in the building structure at base level and, therefore, keeping the seismic drifts in elastic range in all stories of the building. In this way, the building structure does not need any major repair work, even after a large earthquake, while the conventional building suffers from heavy damage and is not usable after the earthquake.
