Structure‐borne sound transmission at floor/joist connections in wood frame buildings

Abstract Extensive damage was experienced by wood-frame buildings during the Loma Prieta earthquake. A significant contributory factor was the collapse of cripple walls. This prompted the examination of the behavior of a group of full-scale retrofitted cripple walls subjected to in-plane cyclic loads. The results of investigating seven cripple walls, each 2 ft (0.61 m) high and 16 ft (5 m) long, are presented. Two are control panels, without retrofits. Two are strengthened with 1 by 6 inch (25.4 by 153 mm) braces. Two are retrofitted with 0.5 inch (12.7 mm) plywood and one with a steel strap tie. Stiffness, strength, and damping characteristics are summarized, together with cost aspects. It is shown that relatively cheap and straightforward modifications can substantially eliminate the vulnerability of many existing cripple walls to earthquake shaking.

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Performance of Stucco-Clad Wood-Frame Buildings in a Temperate Rain Forest

Water Leakage Through Building Facades ◽

10.1520/stp12102s ◽

2009 ◽

pp. 155-155-13

Author(s):

MJ Dell ◽

SB Liaw

Keyword(s):

Rain Forest ◽

Frame Buildings ◽

Temperate Rain Forest ◽

Wood Frame

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Statistical analysis of earthquake debris extent from wood-frame buildings and its use in road networks in Japan

Earthquake Spectra ◽

10.1177/8755293019892423 ◽

2020 ◽

Vol 36 (1) ◽

pp. 209-231

Author(s):

Luis Moya ◽

Erick Mas ◽

Fumio Yamazaki ◽

Wen Liu ◽

Shunichi Koshimura

Keyword(s):

Urban Areas ◽

Road Networks ◽

Decision Makers ◽

Aerial Photos ◽

Geometrical Properties ◽

Frame Buildings ◽

Before And After ◽

Wood Frame ◽

Collapsed Buildings ◽

The Relationship

Debris scattering is one of the main causes of road/street blockage after earthquakes in dense urban areas. Therefore, the evaluation of debris scattering is crucial for decision makers and for producing an effective emergency response. In this vein, this article presents the following: (1) statistical data concerning the debris extent of collapsed buildings caused by the 2016 Mw 7.0 Kumamoto earthquake in Japan; (2) an investigation of the factors influencing the extent of debris; (3) probability functions for the debris extent; and (4) applications in the evaluation of road networks. To accomplish these tasks, LiDAR data and aerial photos acquired before and after the mainshock (16 April 2016) were used. This valuable dataset gives us the opportunity to accurately quantify the relationship between the debris extent and the geometrical properties of buildings.

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Durability of traditional clamped joints in the vapour barrier layer: experimental and numerical analysis

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2018-0593 ◽

2019 ◽

Vol 46 (11) ◽

pp. 996-1000 ◽

Cited By ~ 1

Author(s):

Lars Gullbrekken ◽

Klodian Gradeci ◽

Øyvind Norvik ◽

Petra Rüther ◽

Stig Geving

Keyword(s):

Climate Change ◽

Energy Consumption ◽

Climatic Conditions ◽

The Other ◽

Use Of Self ◽

Air Leakage ◽

Building Envelopes ◽

Frame Buildings ◽

Wood Frame ◽

Numerical Estimations

Clamped joints of wood frame buildings are a traditional way in Norway to attain airtight joints for the air and vapour barrier. There are numerous defects registered in the SINTEF Building Defects Archive related to air leakage through the vapour barrier, on one hand, and stricter requirements for reduced energy consumption, on the other hand, question today’s efficacy of these type of joints. This study investigates the durability of clamped joints by studying how the airtightness is affected by several drying and wetting cycles. Experimental work is carried out to measure air leakage rates, which in turn, are used to evaluate their impact on the airtightness of two different constructions by numerical estimations. Results show that the air leakage rates are increased significantly due to transient climatic conditions. Clamped joints may no longer provide airtight building envelopes given the stricter requirements for energy consumption and implications of climate change. A more promising and robust alternative is the use of self-adhesive tapes.

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