{"id":284618,"date":"2026-09-08T09:35:03","date_gmt":"2026-09-08T09:35:03","guid":{"rendered":"https:\/\/isaac-global.com\/progetto\/bell-tower-avellino\/"},"modified":"2026-10-06T16:40:00","modified_gmt":"2026-10-06T16:40:00","slug":"bell-tower-avellino","status":"publish","type":"project","link":"https:\/\/isaac-global.com\/en\/progetto\/bell-tower-avellino\/","title":{"rendered":"Bell tower &#8211; Avellino"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row make_equal=&#8221;on&#8221; module_class=&#8221;title-box&#8221; _builder_version=&#8221;4.27.8&#8243; _dynamic_attributes=&#8221;background_image&#8221; _module_preset=&#8221;default&#8221; use_background_color_gradient=&#8221;on&#8221; background_color_gradient_direction=&#8221;0deg&#8221; background_color_gradient_stops=&#8221;#0a0a0a 0%|rgba(10,10,10,0.73) 0%|rgba(255,255,255,0) 83%&#8221; background_image=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9mZWF0dXJlZF9pbWFnZSIsInNldHRpbmdzIjp7ImVuYWJsZV9odG1sIjoib2ZmIn19@&#8221; background_blend=&#8221;overlay&#8221; min_height=&#8221;65vh&#8221; custom_padding=&#8221;|40px||40px|false|true&#8221; custom_css_main_element=&#8221;align-items: flex-end;&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_button button_text=&#8221;Case Study&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;13px&#8221; button_bg_color=&#8221;#515151&#8243; button_border_radius=&#8221;50px&#8221; button_letter_spacing=&#8221;1px&#8221; button_use_icon=&#8221;off&#8221; custom_margin=&#8221;||10px||false|false&#8221; custom_padding=&#8221;2px|10px|2px|10px|true|true&#8221; animation_style=&#8221;slide&#8221; animation_direction=&#8221;bottom&#8221; animation_intensity_slide=&#8221;5%&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_button][et_pb_heading title=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IiIsImFmdGVyIjoiIiwiZW5hYmxlX2h0bWwiOiJvZmYifX0=@&#8221; _builder_version=&#8221;4.27.8&#8243; _dynamic_attributes=&#8221;title&#8221; _module_preset=&#8221;default&#8221; title_text_color=&#8221;#FFFFFF&#8221; custom_margin=&#8221;||0px||false|false&#8221; animation_style=&#8221;slide&#8221; animation_direction=&#8221;bottom&#8221; animation_intensity_slide=&#8221;5%&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; header_2_text_color=&#8221;#EAEAEA&#8221; animation_style=&#8221;slide&#8221; animation_direction=&#8221;bottom&#8221; animation_delay=&#8221;200ms&#8221; animation_intensity_slide=&#8221;5%&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>Seismic upgrade to achieve a safety index of at least 10%<\/h2>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_3,1_3,1_3&#8243; use_custom_gutter=&#8221;on&#8221; gutter_width=&#8221;2&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb title=&#8221;2024&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; header_font_size=&#8221;45px&#8221; body_text_color=&#8221;#939393&#8243; body_font_size=&#8221;20px&#8221; custom_margin=&#8221;|||40px|false|false&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;|||0px|false|false&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;|||20px|false|false&#8221; border_width_left=&#8221;1px&#8221; border_color_left=&#8221;#939393&#8243; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>year of completion<\/p>\n<p>[\/et_pb_blurb][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb title=&#8221;Electro-Pro 20x&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; header_font_size=&#8221;45px&#8221; body_text_color=&#8221;#939393&#8243; body_font_size=&#8221;20px&#8221; custom_margin=&#8221;|||40px|false|false&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;|||0px|false|false&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;|||20px|false|false&#8221; border_width_left=&#8221;1px&#8221; border_color_left=&#8221;#939393&#8243; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>system installed<\/p>\n<p>[\/et_pb_blurb][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb title=&#8221;Active&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; header_font_size=&#8221;45px&#8221; body_text_color=&#8221;#939393&#8243; body_font_size=&#8221;20px&#8221; custom_margin=&#8221;|||40px|false|false&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;|||0px|false|false&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;|||20px|false|false&#8221; border_width_left=&#8221;1px&#8221; border_color_left=&#8221;#939393&#8243; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>continuous monitoring<\/p>\n<p>[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.20.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;1_2,1_2&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; animation_style=&#8221;slide&#8221; animation_direction=&#8221;bottom&#8221; animation_intensity_slide=&#8221;10%&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.20.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; header_3_text_color=&#8221;#4257FF&#8221; custom_margin=&#8221;||15px|||&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h3>General project description<\/h3>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>The bell tower, owned by the Archconfraternity, had a number of structural issues prior to the works, typical of historic masonry buildings:<\/p>\n<ul>\n<li>vulnerability to seismic activity,<\/li>\n<li>inconsistencies in the materials,<\/li>\n<li>amplification of vibrations at the first modal frequency, which is particularly critical for tall, slender structures.<\/li>\n<\/ul>\n<p>The project involved seismic retrofitting, with the stated aim of increasing the IS-V safety index by at least 10 per cent, without altering the character of the building or resorting to invasive solutions incompatible with its historic value.<br \/>ISAAC was approached directly by the lead designers on the project, Engineers Loffa and Amura. From the outset, a close and open relationship was established, based on the shared objective of combining safety, respect for the historic building and sustainability of the renovation. <\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; header_3_text_color=&#8221;#4257FF&#8221; custom_margin=&#8221;||15px|||&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h3>Why ISAAC<\/h3>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>The decision to use ISAAC technology proved to be crucial: in a listed historic building, where any intervention must be reversible, clearly identifiable and in <strong>compatible with its architectural integrity,<\/strong> the ISAAC system makes it possible to control vibrations and reduce seismic response without altering the building&#8217;s historic fabric or detracting from its appearance.<\/p>\n<p><em>Working with the system designers was crucial: together we tackled both practical challenges \u2013 linked to the limited space \u2013 and theoretical challenges, developing FEM models capable of estimating the structure\u2019s response following the intervention. The expected result is an overall seismic improvement of around 40 per cent \u2013 well above the 10 per cent required by the client \u2013 achieved <strong>without any invasive work on the historic structure,<\/strong> as the installation involved only the internal core built in the 1990s,\u201d <\/em>commented the engineers Amura and Loffa, who oversaw the project on behalf of the client. <\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.20.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/isaac-global.com\/wp-content\/uploads\/2026\/03\/Campanile-Grottaminarda-pianta.png&#8221; title_text=&#8221;Grottaminarda bell tower floor plan&#8221; show_in_lightbox=&#8221;on&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; custom_margin=&#8221;||0px||false|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][difl_datatable responsive_mode=&#8221;off&#8221; row_odd_background_bgcolor=&#8221;#EAEAEA&#8221; table_padding=&#8221;||||false|false&#8221; body_cell_padding=&#8221;20px||20px||true|true&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; row_text_text_color=&#8221;#4257FF&#8221; background_color=&#8221;#f9f9f9&#8243; custom_css_main_element=&#8221;table.df_dt_content {||    table-layout: fixed;||    width: 100%;||}||||table.df_dt_content td.df_dt_table_body_column_cell {||    width: 50%;||}&#8221; border_width_all_table_border=&#8221;0px&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][difl_datatableitem admin_label=&#8221;Tipologia &#8211; Anno&#8221; row=&#8221;Type of building: Bell tower<br \/>\nYear of construction: around 1100&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/difl_datatableitem][difl_datatableitem admin_label=&#8221;Luogo &#8211; Zona Sismica&#8221; row=&#8221;Location: Province of Avellino, Campania<br \/>\nSeismic zone: 1&#8243; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/difl_datatableitem][difl_datatableitem admin_label=&#8221;Materiale &#8211; Piani Mq&#8221; row=&#8221;Construction material: Irregular masonry<br \/>\nFloors and sqm: 3 levels&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/difl_datatableitem][difl_datatableitem admin_label=&#8221;Obiettivo&#8221; enable_column_merge=&#8221;on&#8221; body_col_span_item=&#8221;1&#8243; body_col_span_item_value=&#8221;2&#8243; row=&#8221;Client\u2019s objective: Seismic upgrade to achieve a safety index of at least 10%&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/difl_datatableitem][difl_datatableitem admin_label=&#8221;Intervento&#8221; enable_column_merge=&#8221;on&#8221; body_col_span_item=&#8221;1&#8243; body_col_span_item_value=&#8221;2&#8243; row=&#8221; Type of intervention: &lt;br\/&gt;1) anchoring at the base of the existing reinforced concrete inner core, which was installed as part of the post-earthquake works in 1980;&lt;br\/&gt;2) at belfry level, installation of an AMD-type system providing active damping of the bell tower\u2019s first modal frequency;&lt;br\/&gt;3) repointing of the external masonry joints;&lt;br\/&gt;4) deep grouting between the concrete wall and the existing masonry;&lt;br\/&gt;5) reinforcement of the concrete floor slabs with steel sections    &#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/difl_datatableitem][difl_datatableitem admin_label=&#8221;Dispositivi &#8211; Soluzioni&#8221; enable_column_merge=&#8221;on&#8221; body_col_span_item=&#8221;1&#8243; body_col_span_item_value=&#8221;2&#8243; row=&#8221;No. of ISAAC devices installed: 1 inertial axis (Electro-Pro 20x)&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/difl_datatableitem][difl_datatableitem admin_label=&#8221;Soluzioni&#8221; enable_column_merge=&#8221;on&#8221; body_col_span_item=&#8221;1&#8243; body_col_span_item_value=&#8221;2&#8243; row=&#8221;Retrofit solutions used in partnership to achieve goal: n\/a&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/difl_datatableitem][\/difl_datatable][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.27.9&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row use_custom_gutter=&#8221;on&#8221; gutter_width=&#8221;2&#8243; _builder_version=&#8221;4.27.9&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column 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frequency, which [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":284614,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"project_category":[184],"project_tag":[],"class_list":["post-284618","project","type-project","status-publish","has-post-thumbnail","hentry","project_category-historic-heritage"],"yoast_head":"<title>ISAAC Case Study | Bell Tower, Grottaminarda, Avellino<\/title>\n<meta name=\"description\" content=\"Explore the case study of the Bell Tower of San Michele Arcangelo in Grottaminarda: an in-depth look at the seismic retrofit, featuring active control of oscillations through high-efficiency AMD technology.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/isaac-global.com\/en\/progetto\/bell-tower-avellino\/\" \/>\n<meta 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