{"id":524,"date":"2017-03-31T13:33:12","date_gmt":"2017-03-31T13:33:12","guid":{"rendered":"http:\/\/buildsoftsupport.com\/?post_type=ht_kb&#038;p=524"},"modified":"2017-03-31T13:46:54","modified_gmt":"2017-03-31T13:46:54","slug":"what-is-the-meaning-of-h_opt-and-h_min","status":"publish","type":"ht_kb","link":"https:\/\/support.buildsoft.eu\/fr\/knowledge-base\/what-is-the-meaning-of-h_opt-and-h_min\/","title":{"rendered":"What is the meaning of h_opt  and h_min or b_min"},"content":{"rendered":"<h2>h<sub>opt<\/sub><\/h2>\n<div>The optimum height h<sub>opt<\/sub> is the height at which the concrete is subjected to a compressive strain of 3.5\u2030 and the steel to a tensile strain of 10\u2030, in other words the height at which both steel and concrete are used in an optimum way. So if you would choose\u00a0 the beam height would be equal to the h<sub>opt<\/sub>, the steel and concrete are optimally utilized.<\/div>\n<div><\/div>\n<h2>h<sub>min<\/sub><\/h2>\n<div>The minimum height h<sub>min<\/sub> is the height which just meets the requirements to resist to the loads without needing any compression reinforcement ; in other words, if we should choose a smaller height the beam would collapse by smashing the concrete if we did not foresee compression reinforcement. The steel is just at yield strength.<\/div>\n<div><\/div>\n<div>\n<h2>h<sub>opt<\/sub> and h<sub>min<\/sub> are not visible?<\/h2>\n<\/div>\n<p>h<sub>opt<\/sub> and h<sub>min<\/sub> are only calculated and only visible when h &lt; h<sub>opt<\/sub>.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-535 aligncenter\" src=\"http:\/\/buildsoftsupport.com\/wp-content\/uploads\/2017\/03\/concrete_hopt_hmin.png\" alt=\"\" width=\"241\" height=\"205\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/03\/concrete_hopt_hmin.png 241w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/03\/concrete_hopt_hmin-50x43.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/03\/concrete_hopt_hmin-60x51.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/03\/concrete_hopt_hmin-35x30.png 35w\" sizes=\"(max-width: 241px) 100vw, 241px\" \/><\/p>\n<h2>b<sub>min<\/sub><\/h2>\n<p>When the cross section does not meet the requirements to resist the shear force, the minimum width at which the concrete compression struts in the classical truss girder analogy of M\u00f6rsch just fail to get smashed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>hopt The optimum height hopt is the height at which the concrete is subjected to a compressive strain of 3.5\u2030 and the steel to a tensile strain of 10\u2030, in other words the height at which both steel and concrete are used in an optimum way. So if you would&#8230;<\/p>\n","protected":false},"author":2,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":[],"ht-kb-category":[54],"ht-kb-tag":[],"_links":{"self":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/524"}],"collection":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/comments?post=524"}],"version-history":[{"count":3,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/524\/revisions"}],"predecessor-version":[{"id":537,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/524\/revisions\/537"}],"wp:attachment":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/media?parent=524"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb-category?post=524"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb-tag?post=524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}