{"id":35,"date":"2020-11-25T17:58:31","date_gmt":"2020-11-25T17:58:31","guid":{"rendered":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/?page_id=35"},"modified":"2023-07-04T10:33:25","modified_gmt":"2023-07-04T17:33:25","slug":"research-interests","status":"publish","type":"page","link":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/research-interests\/","title":{"rendered":"Research Interests"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"35\" class=\"elementor elementor-35\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-662e9a79 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"662e9a79\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5911656b\" data-id=\"5911656b\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6a535095 elementor-widget elementor-widget-text-editor\" data-id=\"6a535095\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Current and recent topics<\/h3><ul><li style=\"font-size: 16px\">Performance of embankments on spatially variable deposits of liquefiable sands and soft clays.<\/li><li style=\"font-size: 16px\">Strength loss and strain-softening in contractive fine-grained soils under static and seismic loading.<\/li><li style=\"font-size: 16px\">Constitutive modeling of liquefaction in sands and cyclic softening in clays\/silts. In collaboration with Katerina Ziotopoulou.<\/li><li style=\"font-size: 16px\"><span style=\"background-color: transparent;color: var( --e-global-color-text );font-weight: var( --e-global-typography-primary-font-weight )\">Soil liquefaction during earthquakes. In collaboration with I. M. Idriss.<\/span><\/li><li>Cracking and concentrated leak erosion failure modes in embankments. In collaboration with Jason DeJong &amp; Jack Montgomery.<\/li><li><span style=\"background-color: transparent;color: var( --e-global-color-text );font-weight: var( --e-global-typography-primary-font-weight )\">NHERI Equipment Facility. In collaboration with Jason DeJong, Dan Wilson, Bruce Kutter, Alejandro Martinez, &amp; Katerina Ziotopoulou.<\/span><\/li><\/ul><h3>\u00a0<\/h3><h3>PM4Sand: A sand plasticity model for earthquake engineering applications<\/h3><ul><li>The sand plasticity model, PM4Sand, by Boulanger and Ziotopoulou has been implemented as a dynamic link library (DLL) for use with the commercial programs, FLAC (Itasca 2016) and FLAC2D (Itasca 2023). <a title=\"PM4Sand\" href=\"https:\/\/pm4sand.engr.ucdavis.edu\/\">The manual and DLL are available here.<\/a><\/li><li>PM4Sand was developed for representing sands and other nonplastic granular soils in geotechnical earthquake engineering applications.<\/li><\/ul><h3>\u00a0<\/h3><h3>PM4Silt: A silt plasticity model for earthquake engineering applications<\/h3><ul><li>The silt plasticity model, PM4Silt, by Boulanger and Ziotopoulou has been implemented as a dynamic link library (DLL) for use with the commercial programs, FLAC (Itasca 2016) and FLAC2D (Itasca 2023). <a title=\"PM4Sand\" href=\"https:\/\/pm4silt.engr.ucdavis.edu\/\">The manual and DLL are available here.<\/a><\/li><li>PM4Silt was developed for representing saturated, plastic silts and clays that exhibit stress-history normalized behaviors in geotechnical earthquake engineering applications.<\/li><\/ul><h3>\u00a0<\/h3><h3>Penetration model and inverse filtering procedures<\/h3><ul style=\"list-style-type: square\"><li>An inverse filtering procedure was developed by Boulanger and DeJong (<a href=\"https:\/\/ucdavis.box.com\/s\/75njn8jcyznlvo7pbod2rcu6oqmzxy80\">2018<\/a>) to correct CPT data for thin-layer and transition zone effects. A zip file containing the MatLab code with one example application to CPT data can be downloaded <a href=\"https:\/\/ucdavis.box.com\/s\/13ndjjq8wxehg40x3ecv70v5eqx73chs\">here<\/a>.<\/li><li>The penetration filter model has also been used to estimate end bearing capacities of driven piles (Bittar et al 2020).\u00a0<\/li><\/ul><h3>\u00a0<\/h3><h3>Dynamic centrifuge modeling and archived experimental data<\/h3><ul><li>Dynamic centrifuge modeling is used to study fundamental mechanisms and evaluate numerical analysis methodologies. The 9-m radius and 1-m radius geotechnical centrifuges at UC Davis are part of the <a href=\"http:\/\/cgm.engr.ucdavis.edu\/\" target=\"_blank\" rel=\"noopener noreferrer\">Center for Geotechnical Modeling<\/a>, which also serves as an equipment facility in the NSF-funded NHERI network.<\/li><li>Archived experimental data from centrifuge studies at our facility are publicly available through the CGM (mostly pre 2005 data) and the NEES archives (for most recent data).<\/li><\/ul><h3>\u00a0<\/h3><p><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-content\/uploads\/sites\/13\/2021\/03\/Group-photo-with-Chancellor-May.jpg\" alt=\"\" width=\"462\" height=\"225\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-content\/uploads\/sites\/13\/2021\/03\/2013-08-20-13_07_14-300x225.png\" alt=\"\" width=\"300\" height=\"225\" \/><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Current and recent topics Performance of embankments on spatially variable deposits of liquefiable sands and soft clays. Strength loss and strain-softening in contractive fine-grained soils under static and seismic loading. Constitutive modeling of liquefaction in sands and cyclic softening in clays\/silts. In collaboration with Katerina Ziotopoulou. Soil liquefaction during earthquakes. In collaboration with I. M. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-35","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/pages\/35","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/comments?post=35"}],"version-history":[{"count":53,"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/pages\/35\/revisions"}],"predecessor-version":[{"id":931,"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/pages\/35\/revisions\/931"}],"wp:attachment":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/boulanger\/wp-json\/wp\/v2\/media?parent=35"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}