{"id":558482,"date":"2024-11-05T18:21:09","date_gmt":"2024-11-05T18:21:09","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/esdu-830092012\/"},"modified":"2024-11-05T18:21:09","modified_gmt":"2024-11-05T18:21:09","slug":"esdu-830092012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/esdu\/esdu-830092012\/","title":{"rendered":"ESDU 83009:2012"},"content":{"rendered":"<p>\n\tESDU 83009 provides damping data for the estimation of the small<br \/>\namplitude response of tall buildings to wind excitation. Data<br \/>\nenable the modal damping, expressed as a fraction of critical<br \/>\ndamping, to be estimated for the first translational modes of<br \/>\nvibration parallel to the two principal axes of deformation. The<br \/>\nmethod applies to buildings of regular construction over 20 m (65<br \/>\nft) tall. The modal damping ratio is given by the sum of the modal<br \/>\nstructural and aerodynamic damping ratios. The modal structural<br \/>\ndamping ratio may be estimated from simple design charts based on<br \/>\nfull-scale measurements, and the modal aerodynamic damping ratio is<br \/>\ngiven by simple formulae. The effect of foundation damping is<br \/>\ndiscussed. The mechanisms of damping in a tall building are<br \/>\nexplained, and the effect of increasing amplitude of vibration on<br \/>\nthe modal damping is discussed. Full-scale test results illustrate<br \/>\nthe effect. Methods of measuring the modal damping, with an<br \/>\nexplanation of the accuracy of measured values, are outlined.<br \/>\nVarious techniques for increasing the modal damping are considered.<br \/>\nThe mode-generalised parameters required for the response<br \/>\ncalculations by the normal-mode method are presented, and their<br \/>\napplication in the design of damped scale models of full-scale<br \/>\nbuildings is discussed. Other modal damping expressions commonly<br \/>\nused in the study of tall building response are given.\n\t<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Damping of Structures &#8211; Part 1: Tall Buildings<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/esdu\/\"><b>ESDU<\/b><\/a><\/td>\n<td>2012-03<\/td>\n<td>45<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":558492,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2675],"product_tag":[],"class_list":{"0":"post-558482","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-esdu","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/558482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/558492"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=558482"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=558482"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=558482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}