Back-of-the-Envelope analysis of plan-asymmetric confined masonry buildings for force-based seismic design

During Wenchuan Ms 8.0 earthquake, masonry buildings have suffered severely damaged and collapsed, causing heavy casualties and huge economic losses. In this paper, based on seismic site survey data, some new phenomena and characteristics of earthquake damage in comparison with the 1976 Tangshan earthquake, such as seismic damage of large space buildings, inclined or “X” shaped crack in wall between windows or spandrel wall, stair damage, falling of precast reinforced concrete slab and horizontal crack at the bottom of structure, are discussed in detail. Then, the impact factors of seismic capacity of masonry building in Wenchuan earthquake, including construction age, seismic fortification, bay size, floor (roof) form, layer number, thickness of bearing wall are analyzed, respectively; Finally, some recommendations on seismic design and reconstruction of masonry structure by the seismic design code are proposed.

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Seismic Design of Wood and Masonry Buildings

The Seismic Design Handbook ◽

10.1007/978-1-4615-1693-4_11 ◽

2001 ◽

pp. 563-621

Author(s):

John G. Shipp ◽

Gary C. Hart

Keyword(s):

Seismic Design ◽

Masonry Buildings

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Geotechnical Seismic Vulnerability Assessment of Puerto Vallarta, México

10.21203/rs.3.rs-325281/v1 ◽

2021 ◽

Author(s):

Christian R Escudero ◽

Alejandro Ramirez Gaytan ◽

Araceli Zamora Camacho ◽

Adolfo Preciado ◽

Karen L. Flores ◽

...

Keyword(s):

Resonance Frequency ◽

Latin American ◽

Vulnerability Assessment ◽

Seismic Risk ◽

Seismic Vulnerability ◽

Construction Materials ◽

Standard Penetration Test ◽

Masonry Buildings ◽

Seismic Vulnerability Assessment ◽

Confined Masonry

Abstract We performed a seismic vulnerability assessment that involves geotechnical and building structure analysis for Puerto Vallarta, Mexico, a city located along the pacific coast. Like many other Latin American cities, has significant seismic risk. We implemented the multi-channel analysis of surface waves and the horizontal-to-vertical spectral ratio methods to estimate shear wave velocity and soil resonance frequency. We considered standard penetration test to determine the penetration resistance and soil classification. We also defined building typologies based on construction materials and structural systems. The VS30 parameter shows that Puerto Vallarta has the three poorest soil classifications. The resonance frequency parameter shows four zones with different fundamental soil periods. We inferred the building's vulnerability from the coupling between the structural and soil fundamental period and the soil characteristics. The analysis shows several vulnerable buildings scatters within the city, e.g., within the tourist area, confined masonry buildings from one to five stories and moment resistance frame buildings up to 12 in the tourist area, poorly confined masonry houses of one to two stories, and confined masonry buildings of one to five stories in the residential/commercial. We present an approach that combines the academic and government to solve a real and transcendental problem since it might directly affect the regulation and structure evaluations in the area. We are sure that these exercises are of great interest in urban growth areas in other parts of the world, especially in Latin America, to achieve seismic risk mitigation.

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Assessment of Important Parameters for Seismic Analysis and Design of Confined Masonry Buildings: A Review

Lecture Notes in Civil Engineering - Advances in Structural Technologies ◽

10.1007/978-981-15-5235-9_20 ◽

2020 ◽

pp. 261-275

Author(s):

Bonisha Borah ◽

Vaibhav Singhal ◽

Hemant B. Kaushik

Keyword(s):

Seismic Analysis ◽

Masonry Buildings ◽

Confined Masonry ◽

Analysis And Design

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Prelims - Constructing low-rise confined masonry buildings

Constructing low-rise confined masonry buildings ◽

10.3362/9781780449906.000 ◽

2018 ◽

pp. i-xii

Author(s):

Tom Schacher ◽

Tim Hart

Keyword(s):

Masonry Buildings ◽

Confined Masonry

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Displacement-Based Seismic Assessment of Low-Height Confined Masonry Buildings

Earthquake Spectra ◽

10.1193/1.3111149 ◽

2009 ◽

Vol 25 (2) ◽

pp. 439-464 ◽

Cited By ~ 11

Author(s):

Amador Terán-Gilmore ◽

Oscar Zuñiga-Cuevas ◽

Jorge Ruiz-García

Keyword(s):

Pushover Analysis ◽

Relative Strength ◽

Seismic Assessment ◽

Shaking Table ◽

Evaluation Procedure ◽

Masonry Buildings ◽

Confined Masonry ◽

Shaking Table Testing ◽

Displacement Based ◽

Global And Local

This paper presents a practical displacement-based evaluation procedure for the seismic assessment of low-height regular confined masonry buildings. First, the so-called Coefficient Method established in several FEMA documents is adapted to obtain rapid estimates of inelastic roof displacement demands for regular confined masonry buildings. For that purpose, a statistical study of constant relative strength inelastic displacement ratios of single-degree-of-freedom systems representing confined masonry buildings is carried out. Second, a nonlinear simplified model is introduced to perform pushover analysis of regular confined masonry buildings whose global and local behavior is dominated by shear deformations in the masonry walls. The model, which can be applied through the use of commercial software, can be used to establish the capacity curve of such buildings. Finally, the evaluation procedure is applied to a three-story building tested at a shaking table testing facility.

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