{"id":428148,"date":"2025-04-07T13:44:03","date_gmt":"2025-04-07T13:44:03","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/unbonded-post-tensioning-concrete-wall\/"},"modified":"2025-04-07T13:44:03","modified_gmt":"2025-04-07T13:44:03","slug":"unbonded-post-tensioning-concrete-wall","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/unbonded-post-tensioning-concrete-wall\/","title":{"rendered":"unbonded post-tensioning concrete wall"},"content":{"rendered":"<p>&lt;p&gt;Hi Ansys community, I am modeling a prestressed concrete wall with an unbonded post tensioning tendon. I am getting a big distortion on the anchored steel plates that are placed at the ends of the tendon. Any suggestions to eliminate the stress concentration on the end plates? Thank you!&lt;br&gt;&lt;br&gt;The prestressing force (104 kips) was applied to a link180 element using INISTATE to apply 113 ksi in tension. The anchorage plates used structural steel NL model with a yielding tensile strength of 60 ksi. The dimension of the steel plates was 5 in x5 in, and the resulting stress on the plates from prestressing force is much lower than the yielding strength. However, a stress concentration was developed on the plate surface, and the resultant prestress force in the tendon was incorrectly only half of the applied force.&lt;br&gt;&lt;br&gt;Bonded contact was defined for the concrete-steel plate contact region, and a joint with fixed 6 DOFs was defined between the plate face and the end node of the tendon.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/04\/07-04-2025-1744033345-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/04\/07-04-2025-1744033412-mceclip1.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-428148","topic","type-topic","status-publish","hentry","topic-tag-concrete-non-linear","topic-tag-prestress"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["428148"],"_bbp_subscription":["519623","20905"],"_bbp_author_ip":["2610:130:101:300:35b1:8cad:142f:28c9"],"_bbp_last_reply_id":["428718"],"_bbp_last_active_id":["428718"],"_bbp_last_active_time":["2025-04-11 19:01:52"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["519623","20905"],"_btv_view_count":["216"],"_bbp_topic_status":["unanswered"]},"test":"1e851e67bb636299d74bfc5686eaf8c6d6699432"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/428148","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\/428148\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=428148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}