I am modelling a bridge structure in which the deck is connected to the piers through elastomeric bearings.<\/p>\n
I have modelled the bridge deck as solid. As I am not <\/strong>modelling a 3D of the elastomeric bearings, I have modelled the upper and lower part of the bearings as as surfaces with 0.001 m of thickness. The upper part is embedded with the deck and the lower with the pier.<\/p>\n I have connected both surface (up and down) by bushing connections. In which the lower part is the reference, and the upper part is the mobile. Additionally, I assume the lower parts (pier) as fixed.<\/p>\n Elastomeric bearings are elastic systems which gives freedom of movement and rotation. Elastomeric properties are given by stiffness and rotation in each direction and axis.<\/p>\n Question 0: <\/strong>Is this a good approach?<\/p>\n Question 1: <\/strong>Should I put the reference coordinate system the Reference <\/em>face gravity centre?<\/p>\n Question 2:<\/strong> What is the difference between MPC<\/em> or Bushing<\/em> formulation? Whenever I use Bushing<\/em> formulation, I get an error saying: “The current analysis is not supported with joint defined with bushing formulation.”<\/em>.<\/p>\n Question 3:<\/strong> Once I run the simulation, I get results with the following warning. The solution to this problem is only to use a better computer?<\/p>\n – During this solution, the elapsed time exceeded the CPU time by an excessive margin. Often this indicates either a lack of physical memory (RAM) required to efficiently handle this simulation or it indicates a particularly slow hard drive configuration. This simulation can be expected to run faster on identical hardware if additional RAM or a faster hard drive configuration is made available. For more details, please see the Ansys Performance Guide which is part of the Ansys Help system.<\/em><\/p>\n Question 4: <\/strong>If the material used is concrete, should I use stiffness behaviour Rigid<\/em>? And if it is structural steel, Flexible<\/em>?<\/p>\n <\/p>\n","protected":false},"template":"","class_list":["post-280715","topic","type-topic","status-closed","hentry","topic-tag-bushing-1","topic-tag-static-structural","topic-tag-stiffness"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["2267","240"],"_bbp_author_ip":["23.223.149.174"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2018"],"_edit_lock":["1682590750:181119"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["280715"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","2267"],"_bbp_voice_count":["2"],"_bbp_reply_count":["12"],"_bbp_last_reply_id":["287060"],"_bbp_last_active_id":["287060"],"_bbp_last_active_time":["2023-06-05 07:23:58"]},"test":"pv00170surrey-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/280715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/280715\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=280715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}