砌体结构设计导则:面外荷载

N. Galati, E. Garbin, G. Tumialan, A. Nanni
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引用次数: 9

摘要

摘要:在地震荷载或高风压引起的面外荷载作用下,无筋砌体(URM)墙体容易发生破坏。纤维增强聚合物(FRP)以层压板或网格形式用环氧或聚脲基树脂粘接在砌体表面;或FRP筋用作近表面安装(NSM)加固,使用环氧树脂或乳胶改性胶凝膏粘合在砌体上,已成功地用于增加URM墙体的弯曲和/或剪切能力。然而,由于缺乏具体的设计指南,frp加固砌体结构的实际应用仅限于少数研究项目。本文介绍了面外荷载作用下砌体墙体FRP加固的临时设计准则。所提出的设计方法为对外粘结FRP系统砌体墙的面外升级感兴趣的工程师提供了第一次合理的尝试。
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Design Guidelines for Masonry Structures: Out of Plane Loads
Synopsis: Unreinforced masonry (URM) walls are prone to failure when subjected to out-of-plane loads caused by seismic loads or high wind pressure. Fiber Reinforced Polymers (FRP) in the form of laminates or grids adhesively bonded to the masonry surface with epoxy or polyurea based resins; or FRP bars used as Near Surface Mounted (NSM) reinforcement bonded to the masonry using epoxy or latex modified cementitious pastes, have been successfully used to increase flexural and/or shear capacity of URM walls. However, the practical application of FRPs to strengthen masonry structures is only limited to few research projects due to the limited presence of specific design guidelines. This paper describes provisional design guidelines for the FRP strengthening of masonry walls subject to out of plane loads. The proposed design methodology offers a first rational attempt for consideration by engineers interested in out-of-plane upgrade of masonry walls with externally bonded FRP systems.
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