Lessons from the seismic behavior of a steel grid roof structure heavily damaged in Lushan earthquake

Li, Jichao; Qu, Zhe; Wang, Tao

doi:10.1007/s11803-019-0492-y

Cited by 12 publications

(1 citation statement)

References 10 publications

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“…The damage, including loss of concrete at the underside of the roof truss-cantilever column connections, slippage of the roof truss base plates atop the columns, and splitting cracks and spalled concrete in the beam-column joints at the top of columns, were observed (Constantinou et al, 2001). Similar observations have been reported in the Great East Japan Earthquake of 2011 in Japan (AIJ, 2014; Matsumoto et al, 2012) and Lushan Earthquake of 2013 in China (Dai et al, 2013; Li et al, 2019). One of the most typical damages observed was the failure of roof joints connecting the steel roof and reinforced concrete frames.…”

Section: Introductionsupporting

confidence: 81%

Seismic behavior of steel space truss connections to reinforced concrete supporting columns

Cui

Yang

Liu

et al. 2022

Advances in Structural Engineering

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Roof joint is a critical connection in space truss structures, which connects the upper steel space truss roofs and reinforced concrete structures. Because of its simple structural detailing and easy construction, a typical kind of roof joint is comprised of four embedded anchor rods, a mortar layer, a base plate, and stiffeners are popular in small- to medium-span space truss structures. Among them, base plates with slotted bolt holes are commonly used to release the deformation caused by temperature change or earthquake input. The roof joints were considered either as pinned or rigid connections in the design. In this paper, quasi-static tests investigating the influence of the applied axial force and the shape of bolt holes on the shear resistance and seismic behavior of roof joints were performed. The roof joints exhibited semi-rigid connection behavior and two types of initial resistance mechanisms, sliding and overturning, were observed. With the increase of applied axial force, the behavior of roof joint changes from sliding to overturning. Finally, effective methods to determine the initial resistance mechanism and calculate the ultimate shear strength of roof joints are proposed. These findings and analyses may provide guidelines for roof joint design practice for space truss structures.

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Section: Introductionsupporting

confidence: 81%