两层约束砌体结构在循环荷载作用下的数值与试验研究

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Mosaad El-Diasity, Sayed Salah, Mohamed O. R. El-Hariri, Amr A. Gamal, Tarik S. Elsalakawy
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引用次数: 0

摘要

本文介绍了采用当地材料和标准对两层约束砌体结构进行横向循环荷载的数值和试验结果。两个半比例尺约束砌体结构采用粘土砌体单元,约束柱,束梁和钢筋混凝土板。在垂直自重和横向反向循环载荷下,使用位移控制加载方法对组件进行了测试直至失效。组件的壁面有不同的穿孔(实体/窗户/门),以检查穿孔对面内和面外性能的影响。采用了一种带有铁层的强化组件,这种建议的升级方法提高了受限组件的侧阻力约(61-95%),同时提高了延展性和总能量吸收27%。破坏时的最大横向漂移已经降低到(23-31%),然而第一个可见裂缝的相应载荷已经提高了(150-175%)。此外,加固墙(所有侧面,特别是穿孔的侧面)的完全破坏已被推迟。比较本研究中所包含的有限元模型的变形形式、断裂模式和容量曲线,结果非常一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Numerical and Experimental Behavior of Two-Story Confined Masonry Structure Subjected to Cyclic Loads

Numerical and Experimental Behavior of Two-Story Confined Masonry Structure Subjected to Cyclic Loads

This research presents the numerical and experimental results of lateral cyclic loading applied on a two-story confined masonry structure utilizing local materials and standards. Two half-scale confined masonry structures were constructed using clay masonry units, confining columns, tie beams, and reinforced concrete slabs. The assemblies were tested up to failure using a displacement controlled loading methodology under vertical self-weight and lateral reversed cyclic loading. The walls of the assemblies have varying perforations (solid / windows / doors) to examine the influence of perforation on in-plane and out-of-plane performance. A strengthened assembly with an exterior layer of ferrocement has been used and this suggested upgrading approach enhanced the lateral resistance of the confined assembly by about (61–95%) while improving ductility and total energy absorbed by 27%. The maximum lateral drift at failure have been decreased to (23–31%), however the corresponding load for the first visible fracture have been raised by (150–175%). Furthermore, total failure has been delayed for the strengthened walls (all sides, particularly the perforated sides). Comparing distorted forms, fracture patterns, and capacity curves of finite element models included in this research yielded excellent agreement.

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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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