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Seismic behavior of reinforced concrete frame infilled with insulated integrated wall panel.

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Title: Seismic behavior of reinforced concrete frame infilled with insulated integrated wall panel.
Authors: Hou, Chongchi1 (AUTHOR) chongchihou@sjzu.edu.cn, Wang, Kaixuan1 (AUTHOR) flyfishno78@163.com, Wang, Qinghe1 (AUTHOR) wangqinghe@sjzu.edu.cn, Si, Jinlong2 (AUTHOR) longjunsicseb@163.com, Guo, Xiaohong2 (AUTHOR) xiaohongguocseb@163.com
Source: Structural Concrete. Apr2026, Vol. 27 Issue 2, p1971-1994. 24p.
Subjects: Reinforced concrete, Structural panels, Seismic response, Ductility, Lateral loads, Joints (Engineering), Prefabricated buildings
Abstract: The techniques of prefabricated building components have been popularized and utilized for years. To improve the installation efficiency and prompt the application of assembly buildings, this paper proposed a modified type of insulated integrated wall panel. For this type of insulated integrated wall panel, the mechanical behavior of connection joints, seismic performance, and horizontal capacity calculation methods were investigated and analyzed. First, to ensure the accuracy of the numerical simulation, three quasi‐static tests of frames were reproduced, and the parameter settings were spread to the subsequent numerical simulation. Then, an infilled reinforced concrete (RC) frame with concrete wallboard was designed to check the strength of connection joints under combination loads. Moreover, the effects of concrete strength, wall thickness, axial compression ratio, and longitudinal reinforcement form on the seismic performance of 13 specimens were investigated. Test results showed that the wall thickness and longitudinal reinforcement are positive for the horizontal bearing capacity and ductility, while the concrete strength is negative for the ductility. The horizontal bearing capacity of the infilled wall panel rose by 15% when wall thickness increased by 20 mm, and it increased by 13% when concrete strength increased by 10%. Compared with the pure concrete wallboards, the reinforced wall panel with the minimum reinforcement ratio (0.2%) has the growth of 9% in horizontal bearing capacity and 18% in ductility. Furthermore, based on the iterative method of the softened strut‐and‐tie model, this paper proposed a revised simplified method to predict the horizontal bearing capacity of the wallboard infilled frame. The calculated results of the revised simplified method exhibited good correctness within 8% error. Therefore, this paper can provide references for the design of integrated insulated wall panels. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The techniques of prefabricated building components have been popularized and utilized for years. To improve the installation efficiency and prompt the application of assembly buildings, this paper proposed a modified type of insulated integrated wall panel. For this type of insulated integrated wall panel, the mechanical behavior of connection joints, seismic performance, and horizontal capacity calculation methods were investigated and analyzed. First, to ensure the accuracy of the numerical simulation, three quasi‐static tests of frames were reproduced, and the parameter settings were spread to the subsequent numerical simulation. Then, an infilled reinforced concrete (RC) frame with concrete wallboard was designed to check the strength of connection joints under combination loads. Moreover, the effects of concrete strength, wall thickness, axial compression ratio, and longitudinal reinforcement form on the seismic performance of 13 specimens were investigated. Test results showed that the wall thickness and longitudinal reinforcement are positive for the horizontal bearing capacity and ductility, while the concrete strength is negative for the ductility. The horizontal bearing capacity of the infilled wall panel rose by 15% when wall thickness increased by 20 mm, and it increased by 13% when concrete strength increased by 10%. Compared with the pure concrete wallboards, the reinforced wall panel with the minimum reinforcement ratio (0.2%) has the growth of 9% in horizontal bearing capacity and 18% in ductility. Furthermore, based on the iterative method of the softened strut‐and‐tie model, this paper proposed a revised simplified method to predict the horizontal bearing capacity of the wallboard infilled frame. The calculated results of the revised simplified method exhibited good correctness within 8% error. Therefore, this paper can provide references for the design of integrated insulated wall panels. [ABSTRACT FROM AUTHOR]
ISSN:14644177
DOI:10.1002/suco.70267