<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/xsl" href="https://communities.bentley.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>RM Bridge Dynamics</title><link>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics</link><description /><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>RM Bridge Dynamics</title><link>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics</link><pubDate>Mon, 29 May 2023 17:26:44 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:963cc7d1-b438-488f-8551-a1bec5ed1338</guid><dc:creator>Ana Carla Peres</dc:creator><comments>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics#comments</comments><description>Current Revision posted to LARS | LEAP | OpenBridge | OpenTunnel | RM Wiki by Ana Carla Peres on 5/29/2023 5:26:44 PM&lt;br /&gt;
&lt;p&gt;Dynamic Analysis in&lt;em&gt;&lt;strong&gt;&amp;nbsp;RM Bridge&lt;/strong&gt;&lt;/em&gt; is a very important feature as the program concept is to perform dynamic analyses within the schedule, together with static analyses on the same model and in accordance with the active construction stage.&lt;/p&gt;
&lt;p&gt;As there is not much additional modeling effort it&amp;#39;s more an engineering know-how and a computational processing power issue. With the latest advancements in laptop processors&amp;#39; speeds and capacity, most of the previous long analyses can now be performed in only minutes or hours, even within a usual machine available in any engineering office.&lt;/p&gt;
&lt;p&gt;The model dynamics depends on three major aspects:&amp;nbsp;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Masses&lt;/li&gt;
&lt;li&gt;Damping&amp;nbsp;&lt;/li&gt;
&lt;li&gt;Time dependency of loads&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;The most well-known restriction is due to the lumped mass matrix: as the masses are not distributed, as in reality; but, considered concentrated in the nodes this requires a sufficiently fine subdivision of the structural parts into elements. Though the usual 1/10 of the span for static analysis is normally good enough also for dynamics, only piers might require special attention to their subdivision requirements. The usual natural frequencies analysis is performed and the inclusion of non-linearities is also possible. For&amp;nbsp;bridge structures&amp;nbsp;currently four main areas are usually considered suitable to be more affected by structural dynamics :&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Hydrodynamics&lt;/li&gt;
&lt;li&gt;Moving loads&lt;/li&gt;
&lt;li&gt;Seismic&lt;/li&gt;
&lt;li&gt;Wind&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;For earthquake analysis two possible dynamic analyses are available:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Response Spectrum&lt;/li&gt;
&lt;li&gt;Time History&lt;/li&gt;
&lt;/ul&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: RM, THA, OpenBridge Designer, damping, RM Bridge, RSA, dynamics&lt;/div&gt;
</description></item><item><title>RM Bridge Dynamics</title><link>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics/revision/4</link><pubDate>Wed, 01 Jun 2022 15:45:30 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:963cc7d1-b438-488f-8551-a1bec5ed1338</guid><dc:creator>MarcosBeier</dc:creator><comments>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics#comments</comments><description>Revision 4 posted to LARS | LEAP | OpenBridge | OpenTunnel | RM Wiki by MarcosBeier on 6/1/2022 3:45:30 PM&lt;br /&gt;
&lt;p&gt;Dynamic Analysis in&lt;em&gt;&lt;strong&gt;&amp;nbsp;RM Bridge&lt;/strong&gt;&lt;/em&gt; is a very important feature as the program concept is to perform dynamic analyses within the schedule, together with static analyses on the same model and in accordance with the active construction stage.&lt;/p&gt;
&lt;p&gt;As there is not much additional modeling effort it&amp;#39;s more an engineering know-how and a computational processing power issue. With the latest advancements in laptop processors&amp;#39; speeds and capacity, most of the previous long analyses can now be performed in only minutes or hours, even within a usual machine available in any engineering office.&lt;/p&gt;
&lt;p&gt;The model dynamics depends on three major aspects:&amp;nbsp;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Masses&lt;/li&gt;
&lt;li&gt;Damping&amp;nbsp;&lt;/li&gt;
&lt;li&gt;Time dependency of loads&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;The most well-known restriction is due to the lumped mass matrix: as the masses are not distributed, as in reality; but, considered concentrated in the nodes this requires a sufficiently fine subdivision of the structural parts into elements. Though the usual 1/10 of the span for static analysis is normally good enough also for dynamics, only piers might require special attention to their subdivision requirements. The usual natural frequencies analysis is performed and the inclusion of non-linearities is also possible. For&amp;nbsp;bridge structures&amp;nbsp;currently four main areas are usually considered suitable to be more affected by structural dynamics :&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Hydrodynamics&lt;/li&gt;
&lt;li&gt;Moving loads&lt;/li&gt;
&lt;li&gt;Seismic&lt;/li&gt;
&lt;li&gt;Wind&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;For earthquake analysis two possible dynamic analyses are available:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Response Spectrum&lt;/li&gt;
&lt;li&gt;Time History&lt;/li&gt;
&lt;/ul&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: RM, THA, OpenBridge Designer, damping, RM Bridge, RSA, dynamics&lt;/div&gt;
</description></item><item><title>RM Bridge Dynamics</title><link>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics/revision/3</link><pubDate>Tue, 18 Jan 2022 16:51:43 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:963cc7d1-b438-488f-8551-a1bec5ed1338</guid><dc:creator>MarcosBeier</dc:creator><comments>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics#comments</comments><description>Revision 3 posted to LARS | LEAP | OpenBridge | OpenTunnel | RM Wiki by MarcosBeier on 1/18/2022 4:51:43 PM&lt;br /&gt;
&lt;p&gt;Dynamic Analysis in&lt;em&gt;&lt;strong&gt;&amp;nbsp;RM Bridge&lt;/strong&gt;&lt;/em&gt; is a very important feature as the program concept is to perform dynamic analyses within the schedule, together with static analyses on the same model and in accordance with the active construction stage.&lt;/p&gt;
&lt;p&gt;As there is not much additional modeling effort it&amp;#39;s more an engineering know-how and a computational processing power issue. With the latest advancements in laptop processors&amp;#39; speeds and capacity, most of the previous long analyses can now be performed in only minutes or hours, even within a usual machine available in any engineering office.&lt;/p&gt;
&lt;p&gt;The model dynamics depends on three major aspects:&amp;nbsp;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Masses&lt;/li&gt;
&lt;li&gt;Damping&amp;nbsp;&lt;/li&gt;
&lt;li&gt;Time dependency of loads&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;The most well-known restriction is due to the lumped mass matrix: as the masses are not distributed, as in reality; but, considered concentrated in the nodes this requires a sufficiently fine subdivision of the structural parts into elements. Though the usual 1/10 of the span for static analysis is normally good enough also for dynamics, only piers might require special attention to their subdivision requirements. The usual natural frequencies analysis is performed and the inclusion of non-linearities is also possible. For&amp;nbsp;bridge structures three main areas are usually considered suitable to be more affected by structural dynamics :&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Moving loads&lt;/li&gt;
&lt;li&gt;Seismic&lt;/li&gt;
&lt;li&gt;Wind&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;For earthquake analysis two possible dynamic analyses are available:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Response Spectrum&lt;/li&gt;
&lt;li&gt;Time History&lt;/li&gt;
&lt;/ul&gt;
&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: RM, THA, OpenBridge Designer, damping, RM Bridge, RSA, dynamics&lt;/div&gt;
</description></item><item><title>RM Bridge Dynamics</title><link>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics/revision/2</link><pubDate>Tue, 18 Jan 2022 16:44:14 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:963cc7d1-b438-488f-8551-a1bec5ed1338</guid><dc:creator>MarcosBeier</dc:creator><comments>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics#comments</comments><description>Revision 2 posted to LARS | LEAP | OpenBridge | OpenTunnel | RM Wiki by MarcosBeier on 1/18/2022 4:44:14 PM&lt;br /&gt;
&lt;p&gt;Dynamic Analysis in&lt;em&gt;&lt;strong&gt;&amp;nbsp;RM Bridge&lt;/strong&gt;&lt;/em&gt; is a very important feature as the program concept is to perform dynamic analyses within the schedule, together with static analyses on the same model in accordance with the active construction stage. Therefore, the is almost no &amp;quot;additional&amp;quot; modeling effort. The model dynamics depends on three major aspects:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Masses&amp;nbsp;&lt;/li&gt;
&lt;li&gt;Damping&amp;nbsp;&lt;/li&gt;
&lt;li&gt;Time dependency of loads&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;The most well-known restriction is due to the lumped mass matrix: as the masses are not distributed, as in reality; but, considered concentrated in the nodes this requires a sufficiently fine subdivision of the structural parts into elements. Though the usual 1/10 of the span for static analysis is normally good enough also for dynamics, only piers might require special attention to their subdivision requirements. The usual natural frequencies analysis is performed and the inclusion of non-linearities is also possible. For&amp;nbsp;bridge structures three main areas are usually considered suitable to be more affected by structural dynamics :&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Moving loads&lt;/li&gt;
&lt;li&gt;Seismic&lt;/li&gt;
&lt;li&gt;Wind&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;For earthquake analysis two possible dynamic analyses are available:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Response Spectrum&lt;/li&gt;
&lt;li&gt;Time History&lt;/li&gt;
&lt;/ul&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: RM, THA, OpenBridge Designer, damping, RM Bridge, RSA, dynamics&lt;/div&gt;
</description></item><item><title>RM Bridge Dynamics</title><link>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics/revision/1</link><pubDate>Tue, 18 Jan 2022 16:39:41 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:963cc7d1-b438-488f-8551-a1bec5ed1338</guid><dc:creator>MarcosBeier</dc:creator><comments>https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/57904/rm-bridge-dynamics#comments</comments><description>Revision 1 posted to LARS | LEAP | OpenBridge | OpenTunnel | RM Wiki by MarcosBeier on 1/18/2022 4:39:41 PM&lt;br /&gt;
&lt;p&gt;Dynamic Analysis in&lt;em&gt;&lt;strong&gt;&amp;nbsp;RM Bridge&lt;/strong&gt;&lt;/em&gt; is a very important feature as the program concept is to perform dynamic analyses within the schedule, together with static analyses on the same model in accordance with the active construction stage. Therefore, the is almost no &amp;quot;additional&amp;quot; modeling effort. The model dynamics depends on three major aspects:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;masses&amp;nbsp;&lt;/li&gt;
&lt;li&gt;damping&amp;nbsp;&lt;/li&gt;
&lt;li&gt;time dependency of loads&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;The most well-known restriction is due to the lumped mass matrix: as the masses are not distributed, as in reality; but, considered concentrated in the nodes this requires a sufficiently fine subdivision of the structural parts into elements. Though the usual 1/10 of the span for static analysis is normally good enough also for dynamics, only piers might require special attention to their subdivision requirements. The usual natural frequencies analysis is performed and the inclusion of non-linearities is also possible. Two main possible analyses are available:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Response Spectrum&lt;/li&gt;
&lt;li&gt;Time History&lt;/li&gt;
&lt;/ul&gt;
&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: RM, THA, OpenBridge Designer, damping, RM Bridge, RSA, dynamics&lt;/div&gt;
</description></item></channel></rss>