Structural Engineering and Mechanics

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Numerical simulation of infill CACB wall cracking subjected to wind loads

  • Ruige Li (School of Civil Engineering and Architecture, Taizhou University) ;
  • Yu Gao (School of Civil Engineering and Architecture, Taizhou University) ;
  • Hongjian Lin (School of Civil Engineering and Architecture, Taizhou University) ;
  • Mingfeng Huang (School of Civil Engineering & Architecture, Zhejiang University) ;
  • Chenghui Wang (Taizhou Institute of Planning and Design for Urban and Rural) ;
  • Zhongzhi Hu (School of Civil Engineering and Architecture, Taizhou University) ;
  • Lingyi Jin (Zhedong Engineering Investigation Institute)
  • Received : 2023.11.06
  • Accepted : 2024.02.21
  • Published : 2024.03.10
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Abstract

The cracking mechanism in ceramsite aerated concrete block (CACB) infill walls were studied in low seismic fortification intensity coastal areas with frequent occurrence of typhoons. The inter-story drifts of an eight-story residential building under wind loads and a seismic fortification intensity of six degrees were analyzed by using the PKPM software. The maximum inter-story drift ratio of the structure in wind load was found to be comparable to that under the seismic fortification intensity of six degrees. However, when accounting for the large gust wind speed of typhoon, the maximum inter-story drift ratio was much larger than that obtained under reference wind load. In addition, the finite element models of RC frames were employed by displacement loading to simulate two scenarios with and without window hole in the CACB infill walls, respectively. The simulation results show no signs of cracking in both the infill walls with window hole and those without window for the inter-story drift caused by seismic loads and the reference wind load. However, both types of infill walls experienced structural creaking when assessing the gust wind pressure recorded from previous typhoon monitoring. It is concluded that an underestimate of wind loads may contribute substantially to the cracking of frame CACB infill walls in low seismic fortification intensity coastal areas. Consequently, it is imperative to adopt wind pressure values derived from gust wind speeds in the design of CACB infill walls within frame structures. Finally, the future research directions of avoiding cracks in CACB filled walls were proposed. They were the material performance improving and building structure optimizing.

Keywords

Acknowledgement

This research was funded by Zhejiang Provincial Natural Science Foundation with grant number LGG20E080006 and the National Natural Science Foundation of China Youth Science Foundation Project with grant number 52009087/E0903. We appreciate the Taizhou Meteorological Bureau for providing the wind speed, wind direction and other meteorological data.

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