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With the rapid growth of urban population, many footbridges have been used for improving the efficiency of transport. However, the construction process of the traditional footbridge is complex, especially for the urban concentrated area, which may involve massive demolition and renovation of the underground pipeline. Usually, it will involve the high cost and long construction period. Herein, the piers and foundations are essential for the construction of the footbridge. Moreover, the conventional pier requires extensive on-site implementations (e.g. casting-on-site, traffic restriction, demolition of underground infrastructure, etc.) Therefore, this study proposes to a novel modularized design of the pier for the aluminum alloy footbridge to avoid the demolition of the underground facility. For rapid installation of each member, each member was designed as the modular: RC shear walls as main bearing element, steel diagonal bracing and capping beams. With the connection of whole grouted sleeves and built-in bolt, all the members can be easily assembled. And also, all the components can be manufactured in the factory and delivered to the construction field conveniently because of the proposed modular design. Though checking computing of each member of modularized design was conducted analytically, the mechanical and seismic performance were evaluated and analyzed by the scaled experiment. The pseudo-static test was carried out. The seismic performance indicators such as the hysteresis curve, skeleton curve, energy dissipation curve and stiffness degradation curve were obtained; additionally, the damage mode was observed. The experimental results show that the novel modularized design of the pier for the aluminum alloy footbridge has good seismic performance. The proposed design can provide the promising option for the construction of footbridge especially in the urban concentrated area.
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