STORY VERTICAL POST-COMPRESSION FOR TIMBER BUILDINGS: A NEW SYSTEM FOR SEISMIC IMPROVEMENT OF CLT WALLS

A new constructive system for multi-story timber building with CLT panels is described. A vertical post-compression of each story allows avoiding the use of traditional joints, as hold-downs and angle brackets. Reducing the number of joint elements, the new constructive system may be faster than the traditional one. The story vertical post-compression allows to improve a shear-type behavior of each story with better performances of the CLT panels. Numerical studies on a single panel and a fivestory building are made performing pushover static equivalent nonlinear analyses. These studies show as the new system allows better performances, in the case of horizontal actions, in comparison to the traditional constructive use of CLT panels. Thus, the new system is very suitable, for timber buildings, in areas prone to seismic actions and wind actions.

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FE Calculations of J-Integrals on Crack Length in a Constrained Elastomeric Disc With Crack Surface Pressures and Isothermal Loads

Pressure Vessels and Piping ◽

10.1115/imece2004-61777 ◽

2004 ◽

Cited By ~ 1

Author(s):

H. K. Ching ◽

C. T. Liu ◽

S. C. Yen

Keyword(s):

Crack Length ◽

Crack Surface ◽

J Integral ◽

Nonlinear Analyses ◽

Additional Line ◽

Line Integral ◽

Numerical Studies ◽

Maximum Value ◽

Linear And Nonlinear ◽

Material Compressibility

In this study, we performed linear and nonlinear FE (Finite Element) analyses to compute J-integrals for a centrally perforated star-shaped disc, which is made of an elastomeric material, under crack surface pressures and isothermal loads. Deformations of the disc were constrained by a circular steel ring enclosing the disc. Different crack sizes were assumed to exist in the front of the star-shaped notches. For linear the analysis, material compressibility was modeled with Poisson’s varying form 0.48 to 0.4999. In addition, with the presence of the crack surface pressure, the J-integral needs to be modified by including an additional line integral. Numerical studies showed that the value of the J-integral increases with the increase of the crack length, reaches a maximum value at 1in of crack length, and then decreases gradually. Both linear and nonlinear analyses agree qualitatively but differ quantitatively. It was also found that values of the J-integral strongly depend upon the material compressibility.

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