Seismic Behavior and Retrofit of Infilled Frames

Tabeshpour, Mohammad Reza; Azad, Amir Reza Ghiami

doi:10.5772/28579

Cited by 5 publications

(4 citation statements)

References 32 publications

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“…However, verification of ULS conditions for single-or multi-storey stiffening wall requires the distribution of loads and reliable evaluation of external forces acting in the concrete infill. Such solutions have been confirmed in structures exposed to seismic effects [1][2][3][4]. This paper is a continuation of earlier papers by the author [5,6] concerning distribution of loads onto stiffening walls in buildings with a wall structure.…”

Section: Introductionsupporting

confidence: 60%

Horizontal stiffness of masonry walls infilled frame

Jasiński

2024

MATEC Web Conf.

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Walls used to fill a frame structure may serve non-load bearing (visual, acoustic or fire separation) or load bearing and stiffening functions which provide geometrical stability of a structure. They are shear walls without any vertical load from higher floors. This paper proposes an algorithm for determining stiffness of a singular frame area, taking into account standards CSA S304.1-04, FEMA 306 and FEMA 274. An attempt was made to cover all valid standards (EN 1996-1-1:2010 and prEN 1996-1-1:2017) applied for designs.

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Section: Introductionsupporting

confidence: 60%

Horizontal stiffness of masonry walls infilled frame

Jasiński

2024

MATEC Web Conf.

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“…4 ε ccu is the ultimate compressive strain of restrained concrete. 5 d ccu is the ratio of unloading stiffness to initial elastic modulus when the ultimate compressive strain is reached. 6 f cct is the axial tensile strength of restrained concrete.…”

Section: Concrete Constitutive Relationshipmentioning

confidence: 99%

“…Typically, infilled walls and frames are tightly connected, i.e., rigid connections. Rigid connection can enhance structural stiffness, enabling infilled walls to participate in structural seismic responses [4][5][6]. However, under strong earthquake effects, rigid connections induce detrimental effects on the structure, including amplified seismic responses [7], overall torsion [8], the formation of weak layers [9], and corner shear failures in frame columns [10].…”

Section: Introductionmentioning

confidence: 99%

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Simplified Model Study of Autoclaved Aerated Concrete Masonry Flexible Connection Infilled Frames with Basalt Fiber Grating Strips

Wang,

Xiong,

Wang

2024

Buildings

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Infilled walls and frames typically employ closely spaced rigid connection, which, under seismic actions, can lead to adverse effects such as amplified seismic responses, overall torsion, and the formation of weak layers in the structure. Flexible connection isolating the infilled walls from the frames can effectively mitigate the adverse effects of rigid connections. In order to reduce the structural mass and seismic impacts, Autoclaved Aerated Concrete (AAC) masonry flexible connection infilled walls have been widely researched. However, most AAC masonry flexible connection infilled walls require complex process operations for AAC blocks, which is not conducive to practical applications in engineering. Therefore, an AAC flexible connection infilled wall with Basalt Fiber Grating (BFG) strips instead of steel bars, with simplified process operations, has been proposed. Existing finite element models for BFG strip-reinforced AAC masonry flexible connection infilled walls employ solid elements, which are difficult to apply to large-scale structural simulations; moreover, existing simplified models for flexible connection infilled walls cannot simulate out-of-plane loading. In this paper, based on homogenization methods, using simplified elements to simulate components, a simplified model for the BFG strip-reinforced AAC masonry flexible connection infilled frame is proposed. Utilizing this model, stress analyses under both in-plane and out-of-plane loading are conducted and compared with corresponding experimental results. The results indicate that the in-plane simplified model (ISM) fits well with the experimental results in terms of hysteresis curves, with similar relationships between stiffness degradation and strength attenuation. The displacement force curve of the out-of-plane simplified model (OSM) before reaching the peak load is in good agreement with the experimental results. The maximum plastic range of OSM is 5% smaller than the test results, and it can be considered that the plastic ranges of the two are comparable, manifesting the models’ capability to adequately manifest arching behavior. The simplified model enables simulation of out-of-plane loading and provides a new approach for modeling large-scale frame structures with flexible connection infilled wall.

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Sensitivity analysis of simple methods in determination of offshore jacket structures levels stiffness

Tabeshpour

Ahmadi

2021

J Mar Sci Technol

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Seismic Behavior and Retrofit of Infilled Frames

Cited by 5 publications

References 32 publications

Horizontal stiffness of masonry walls infilled frame

Horizontal stiffness of masonry walls infilled frame

Simplified Model Study of Autoclaved Aerated Concrete Masonry Flexible Connection Infilled Frames with Basalt Fiber Grating Strips

Sensitivity analysis of simple methods in determination of offshore jacket structures levels stiffness

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