Evaluation of lateral strength capacity of cored interlocking block masonry piers under variable pre-compression loads

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL Structures Pub Date : 2024-10-31 DOI:10.1016/j.istruc.2024.107640

Syed Mehran Yousaf, Akhtar Gul, Khan Shahzada, Sajjad Wali Khan

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Abstract

The lateral strength of Cored Interlocking Block Masonry (CIBM) depends on the activation of frictional forces at the interfaces of the bed joints, which is influenced by the axial compression load on the walls. An experimental attempt is made in this paper to assess the influence of precompression axial load on CIBM piers through quasi-static testing procedure. For this purpose, a total of nine (9) CIBM piers were tested experimentally under variable pre-compression loads. The nine CIBM piers were divided into three categories based on variable precompression loading, corresponding to the load of single to three-story buildings. The assessment of structural behavior of CIBM includes damage patterns, lateral strength and stiffness, ultimate story drift, energy dissipation and dampness characteristics. Test results show a substantial enhancement in the lateral load carrying capacity up to 66.58 % by comparing with the lower value of pre-compression load. Compared to low precompression loads, the CIBM piers behaved in a more stable manner at high precompression loading.

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评估不同预压荷载下带芯联锁砌块墩的横向强度能力

有芯联锁砌块砌体（CIBM）的横向强度取决于砌块接缝界面摩擦力的激活，而摩擦力又受到墙体轴向压缩荷载的影响。本文尝试通过准静态测试程序，评估预压缩轴向荷载对 CIBM 墩的影响。为此，我们在不同的预压缩荷载下对总共九（9）个 CIBM 墩进行了实验测试。这九个 CIBM 墩根据可变预压缩荷载分为三类，与单层至三层建筑物的荷载相对应。对 CIBM 结构行为的评估包括破坏模式、侧向强度和刚度、极限层间漂移、能量耗散和潮湿特性。试验结果表明，与较低的预压缩荷载值相比，CIBM 的横向承载能力大幅提高了 66.58%。与低预压荷载相比，CIBM 墩在高预压荷载下表现得更加稳定。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.