Shock tube tests and dynamic behavior analyses on one-way masonry-infilled walls

CHEN De; WU Hao; XU Shilin; WEI Jianshu

doi:10.11883/bzycj-2023-0147

Volume 43 Issue 8

Aug. 2023

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CHEN De, WU Hao, XU Shilin, WEI Jianshu. Shock tube tests and dynamic behavior analyses on one-way masonry-infilled walls[J]. Explosion And Shock Waves, 2023, 43(8): 085103. doi: 10.11883/bzycj-2023-0147

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CHEN De, WU Hao, XU Shilin, WEI Jianshu. Shock tube tests and dynamic behavior analyses on one-way masonry-infilled walls[J]. Explosion And Shock Waves, 2023, 43(8): 085103. doi: 10.11883/bzycj-2023-0147

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Shock tube tests and dynamic behavior analyses on one-way masonry-infilled walls

doi: 10.11883/bzycj-2023-0147

CHEN De^1
,,
WU Hao^{1
,
,},
XU Shilin²,
WEI Jianshu²

1.
College of Civil Engineering, Tongji University, Shanghai 200092, China
2.
Shanghai Dragon Industrial Engineering Co. Ltd., Shanghai 200122, China

Received Date: 2023-04-23
Rev Recd Date: 2023-07-12

Available Online: 2023-07-13

Publish Date: 2023-08-31

Abstract

Abstract

Masonry-infilled walls (MIWs) are prone to crack, fragment, and even collapse under blast loads, attributed to their low strength and weak ductility, which threatens the safety of building structures and the inside occupants and equipment. Aiming to study the dynamic behaviors and failure mechanism of one-way solid MIWs under far-field range explosion, the out-of-plane loading tests on two one-way solid MIWs with different thicknesses were first carried out based on the developed compressed air-driven large cross-section (3 m×3 m) shock tube. The reflected overpressures-time histories that acted on the MIWs, the deflection-time histories, and the deformation failure mode of MIWs were obtained. Then, a refined finite element model of the shock tube was established, and the simplified micro finite element modeling approach of MIWs, as well as the parameter calculation methods of the Riedel-Hiermaier-Thoma material model for expanded masonry blocks and the cohesive contact model for joints, were proposed. The pressure propagation in the shock tube and the out-of-plane dynamic responses and damage of MIWs were further numerically simulated. Finally, the central deflection-time histories of test walls were predicted based on the out-of-plane resistance function and equivalent single-degree-of-freedom model of one-way MIWs under blast loads. It indicated that reducing the height-to-thickness ratio of walls can increase the frame arch thrust, which could significantly improve the blast resistance performance of the MIWs. A105-mm-thick MIW collapsed after one shot, while a 235-mm-thick MIW was slightly damaged after six shots. Both the test and simulation results of reflected overpressure-time histories acted on the surface of MIWs were uniform pulse loads and in good agreement, which validated the reasonability of the design and refined finite element model of the shock tube. The predicted dynamic behaviors of MIWs by the numerical simulation and theoretical calculation method were in good accordance with test data, which can provide a reference for blast-resistant assessment and analysis of MIWs.
- shock tube,
- blast load,
- masonry-infilled wall,
- dynamic behavior,
- out-of-plane loading,
- reflected overpressure

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References(32)

References

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