Documents disponibles écrits par cet auteur

Collapse testing and analysis of a light-frame wood garage wall / John W. Van De Lindt in Journal of structural engineering, Vol. 138 N° 4 (Avril 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 4 (Avril 2012) . - pp. 492–501 Titre : Collapse testing and analysis of a light-frame wood garage wall Type de document : texte imprimé Auteurs : John W. Van De Lindt, Auteur ; Shiling Pei, Auteur ; Weichiang Pang, Auteur Année de publication : 2012 Article en page(s) : pp. 492–501 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Light-frame  wood  Woodframe  Seismic  Shake  table  Numerical  modeling  Collapse  Numerical  model  Co-rotational  formulation Résumé : Light-frame wood (woodframe) buildings have been tested at full-scale sparingly around the world, primarily due to the cost associated with such testing and a general lack of facilities large enough to test at system level. The data from the tests that have been performed are used to help develop nonlinear time history analysis models that can predict the behavior of woodframe buildings during strong ground shaking. It is difficult to test buildings to the point of collapse because such tests can damage costly test equipment, i.e., the shake table. This paper presents the results of a dynamic collapse test on a light-frame wood garage wall and the results of a numerical model to simulate the wall behavior all the way to the collapse point. The tested wall was heavily damaged as a result of subjecting it to a ground motion recorded during the 1995 Kobe earthquake. Then, 85% of a near-fault ground motion recording from the Northridge earthquake was used, which immediately collapsed the test specimen. A specialized wood shear wall analysis program, formulated using a corotational formulation and large deformation theory, was utilized to model the garage wall. The numerical model provided a good prediction (predicted the peak wall displacements to within 15% of the measured values), but as a direct result of the observed failure mechanism of the wall, it was determined that additional contact elements were needed in the model. Failure was observed at the sill plate of the garage wall returns and also in the sheathing due to a moment failure where the header connected to the wall returns. Finally, it was observed that variability in the stiffness of the hold-down connections has a significant influence on the uplift predictions. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000472 [article] Collapse testing and analysis of a light-frame wood garage wall [texte imprimé] / John W. Van De Lindt, Auteur ; Shiling Pei, Auteur ; Weichiang Pang, Auteur . - 2012 . - pp. 492–501. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 4 (Avril 2012) . - pp. 492–501 Mots-clés : Light-frame  wood  Woodframe  Seismic  Shake  table  Numerical  modeling  Collapse  Numerical  model  Co-rotational  formulation Résumé : Light-frame wood (woodframe) buildings have been tested at full-scale sparingly around the world, primarily due to the cost associated with such testing and a general lack of facilities large enough to test at system level. The data from the tests that have been performed are used to help develop nonlinear time history analysis models that can predict the behavior of woodframe buildings during strong ground shaking. It is difficult to test buildings to the point of collapse because such tests can damage costly test equipment, i.e., the shake table. This paper presents the results of a dynamic collapse test on a light-frame wood garage wall and the results of a numerical model to simulate the wall behavior all the way to the collapse point. The tested wall was heavily damaged as a result of subjecting it to a ground motion recorded during the 1995 Kobe earthquake. Then, 85% of a near-fault ground motion recording from the Northridge earthquake was used, which immediately collapsed the test specimen. A specialized wood shear wall analysis program, formulated using a corotational formulation and large deformation theory, was utilized to model the garage wall. The numerical model provided a good prediction (predicted the peak wall displacements to within 15% of the measured values), but as a direct result of the observed failure mechanism of the wall, it was determined that additional contact elements were needed in the model. Failure was observed at the sill plate of the garage wall returns and also in the sheathing due to a moment failure where the header connected to the wall returns. Finally, it was observed that variability in the stiffness of the hold-down connections has a significant influence on the uplift predictions. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000472

Performance-based procedure for direct displacement design of engineered wood-frame structures / Yue Wang in Journal of structural engineering, Vol. 136 N° 8 (Août 2010) 

Public ISBD [article]  in Journal of structural engineering > Vol. 136 N° 8 (Août 2010) . - pp. 978-988 Titre : Performance-based procedure for direct displacement design of engineered wood-frame structures Type de document : texte imprimé Auteurs : Yue Wang, Auteur ; David V. Rosowsky, Auteur ; Weichiang Pang, Auteur Année de publication : 2011 Article en page(s) : pp. 978-988 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Direct  displacement  design  Performance-based  design  Seismic  design  Wood  shear  wall  Wood-frame  structures Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper reports on a study to extend a recently proposed direct displacement design (DDD) procedure for midrise engineered wood-frame structures and develop a set of factors for use in the procedure to meet specified performance levels with certain target probabilities. Representative index multistory building configurations were selected from the archetype buildings developed for the FEMA ATC-63. Seismic hazard levels and performance requirements recommended by ASCE 41-06 and modified for use in the National Science Foundation sponsored NEESWood project were used. The archetype buildings, originally designed using current force-based design procedures, were redesigned using the simplified DDD procedure (also described herein) with a range of nonexceedance (NE) probability adjustment factors (CNE). Specifically, the design interstory shear forces and the sheathing nail spacings were determined for each structure designed using CNE. Nonlinear time-history analysis was performed for each archetype structure under the 2%/50 year seismic hazard level and peak interstory drift distributions were developed. The NE probability at the 4% drift limit was then plotted against building height and design charts were developed for each different value of CNE. Given the building height and desired NE probability, engineers/designers can select the appropriate minimum value of CNE using these charts. Additional analyses could be performed to consider other hazard levels and performance requirements. Using design charts of this type, engineers/designers are able to specify a target drift limit as well as a target NE probability when using the simplified DDD procedure. Thus, a true performance-based procedure for the seismic design of midrise wood-frame structures is described. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i8/p978_s1?isAuthorized=no [article] Performance-based procedure for direct displacement design of engineered wood-frame structures [texte imprimé] / Yue Wang, Auteur ; David V. Rosowsky, Auteur ; Weichiang Pang, Auteur . - 2011 . - pp. 978-988. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 136 N° 8 (Août 2010) . - pp. 978-988 Mots-clés : Direct  displacement  design  Performance-based  design  Seismic  design  Wood  shear  wall  Wood-frame  structures Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper reports on a study to extend a recently proposed direct displacement design (DDD) procedure for midrise engineered wood-frame structures and develop a set of factors for use in the procedure to meet specified performance levels with certain target probabilities. Representative index multistory building configurations were selected from the archetype buildings developed for the FEMA ATC-63. Seismic hazard levels and performance requirements recommended by ASCE 41-06 and modified for use in the National Science Foundation sponsored NEESWood project were used. The archetype buildings, originally designed using current force-based design procedures, were redesigned using the simplified DDD procedure (also described herein) with a range of nonexceedance (NE) probability adjustment factors (CNE). Specifically, the design interstory shear forces and the sheathing nail spacings were determined for each structure designed using CNE. Nonlinear time-history analysis was performed for each archetype structure under the 2%/50 year seismic hazard level and peak interstory drift distributions were developed. The NE probability at the 4% drift limit was then plotted against building height and design charts were developed for each different value of CNE. Given the building height and desired NE probability, engineers/designers can select the appropriate minimum value of CNE using these charts. Additional analyses could be performed to consider other hazard levels and performance requirements. Using design charts of this type, engineers/designers are able to specify a target drift limit as well as a target NE probability when using the simplified DDD procedure. Thus, a true performance-based procedure for the seismic design of midrise wood-frame structures is described. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i8/p978_s1?isAuthorized=no

Simplified direct displacement design of six-story woodframe building and pretest seismic performance assessment / Weichiang Pang in Journal of structural engineering, Vol. 136 N° 7 (Juillet 2010) 

Public ISBD [article]  in Journal of structural engineering > Vol. 136 N° 7 (Juillet 2010) . - pp. 813-825 Titre : Simplified direct displacement design of six-story woodframe building and pretest seismic performance assessment Type de document : texte imprimé Auteurs : Weichiang Pang, Auteur ; David V. Rosowsky, Auteur ; Shiling Pei, Auteur Année de publication : 2011 Article en page(s) : pp. 813-825 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Displacement-based  design  Wood  structures  Shear  walls  Earthquake  engineering  Seismic  hazard  Structural  engineering  Performance-based  design Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents a simplified direct displacement design (DDD) procedure which was used to design the shear walls for a six-story woodframe structure. The building was tested in the final phase of a Network for Earthquake Engineering Simulation (NEES) project. Specifically, NEESWood Capstone Building was designed to meet four performance expectations: damage limitation, life safety, far-field collapse prevention (CP), and near-fault CP. The performance expectations are defined in terms of combinations of interstory drift limits and prescribed seismic hazard levels associated with predefined nonexceedance probabilities. To verify that design requirements were met, a series of nonlinear time-history analyses (NLTHAs) was performed using suits of both far-field and near-fault ground motion records. The distributions of interstory drifts obtained from the NLTHA confirm that the Capstone Building designed using DDD meets all four target performance expectations, thereby validating the DDD procedure. Additionally, collapse analysis in accordance with the recently proposed Applied Technology Council project 63 (ATC-63) methodology was performed. The results of incremental dynamic analyses confirmed that the Capstone Building designed using the DDD procedure has adequate capacity margin against collapse, as dictated by the ATC-63 methodology. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i7/p813_s1?isAuthorized=no [article] Simplified direct displacement design of six-story woodframe building and pretest seismic performance assessment [texte imprimé] / Weichiang Pang, Auteur ; David V. Rosowsky, Auteur ; Shiling Pei, Auteur . - 2011 . - pp. 813-825. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 136 N° 7 (Juillet 2010) . - pp. 813-825 Mots-clés : Displacement-based  design  Wood  structures  Shear  walls  Earthquake  engineering  Seismic  hazard  Structural  engineering  Performance-based  design Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents a simplified direct displacement design (DDD) procedure which was used to design the shear walls for a six-story woodframe structure. The building was tested in the final phase of a Network for Earthquake Engineering Simulation (NEES) project. Specifically, NEESWood Capstone Building was designed to meet four performance expectations: damage limitation, life safety, far-field collapse prevention (CP), and near-fault CP. The performance expectations are defined in terms of combinations of interstory drift limits and prescribed seismic hazard levels associated with predefined nonexceedance probabilities. To verify that design requirements were met, a series of nonlinear time-history analyses (NLTHAs) was performed using suits of both far-field and near-fault ground motion records. The distributions of interstory drifts obtained from the NLTHA confirm that the Capstone Building designed using DDD meets all four target performance expectations, thereby validating the DDD procedure. Additionally, collapse analysis in accordance with the recently proposed Applied Technology Council project 63 (ATC-63) methodology was performed. The results of incremental dynamic analyses confirmed that the Capstone Building designed using the DDD procedure has adequate capacity margin against collapse, as dictated by the ATC-63 methodology. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i7/p813_s1?isAuthorized=no