{"id":2113,"date":"2026-10-14T20:47:12","date_gmt":"2026-10-14T19:47:12","guid":{"rendered":"https:\/\/wpcalc.com\/pt\/engenharia\/pressao-contato-sapata\/"},"modified":"2026-10-14T20:47:12","modified_gmt":"2026-10-14T19:47:12","slug":"pressao-contato-sapata","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/pt\/engenharia\/pressao-contato-sapata\/","title":{"rendered":"Press\u00e3o de contato sob sapata"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Verifica\u00e7\u00e3o da press\u00e3o de contato sob uma sapata carregada<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"2113\" data-favorite-title=\"Press\u00e3o de contato sob sapata\" data-favorite-url=\"https:\/\/wpcalc.com\/pt\/engenharia\/pressao-contato-sapata\/\" data-favorite-excerpt=\"Informe a carga vertical e as dimens\u00f5es em planta da sapata para calcular a press\u00e3o m\u00e9dia de contato do solo sob ela e compar\u00e1-la com a press\u00e3o admiss\u00edvel, verificando se o dimensionamento est\u00e1 aprovado.\" aria-label=\"Adicionar aos favoritos\" data-favorite-icon=\"icon icon-civil\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/pt\/engenharia\/pressao-contato-sapata\/\" method=\"POST\" class=\"calculator\" id=\"calculator-2113\" data-post=\"2113\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Campos de entrada<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Carga vertical (P)<\/label><div class=\"term\">P<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"carga_vertical_p\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"300\" min=\"0.01\" value=\"300\"\/><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"kN\" selected>kN<\/option><option value=\"kip\">kip<\/option><option value=\"lb\">lb<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-1\">Carga vertical total de servi\u00e7o na base da sapata (inclua o peso pr\u00f3prio da sapata e a sobrecarga, se houver)<\/small><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-3\">Comprimento da sapata (L)<\/label><div class=\"term\">L<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"comprimento_da_sapata_l\" id=\"field-3\" aria-describedby=\"calc-info-3\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"2.4\" min=\"0.01\" value=\"2.4\"\/><div class=\"grid grid-cols-1\"><select id=\"field-4\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"m\" selected>m<\/option><option value=\"cm\">cm<\/option><option value=\"ft\">ft<\/option><option value=\"in\">in<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-3\">Maior dimens\u00e3o da sapata em planta<\/small><\/div><div class=\"field has-term\" id=\"input-3\"><label for=\"field-5\">Largura da sapata (B)<\/label><div class=\"term\">B<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"largura_da_sapata_b\" id=\"field-5\" aria-describedby=\"calc-info-5\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"1.8\" min=\"0.01\" value=\"1.8\"\/><div class=\"grid grid-cols-1\"><select id=\"field-6\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"m\" selected>m<\/option><option value=\"cm\">cm<\/option><option value=\"ft\">ft<\/option><option value=\"in\">in<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-5\">Menor dimens\u00e3o da sapata em planta<\/small><\/div><div class=\"field is-single has-term\" id=\"input-4\"><label for=\"field-7\">Tens\u00e3o admiss\u00edvel do solo (q\u2090) \u2014 opcional<\/label><div class=\"term\">q\u2090<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"tenso_admissvel_do_solo_q_opcional\" id=\"field-7\" aria-describedby=\"calc-info-7\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"150\" min=\"0\" value=\"150\"\/><div class=\"grid grid-cols-1\"><select id=\"field-8\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"kPa\" selected>kPa<\/option><option value=\"ksf\">ksf<\/option><option value=\"psi\">psi<\/option><option value=\"MPa\">MPa<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-7\">Capacidade de carga admiss\u00edvel do solo, l\u00edquida ou bruta; deixe vazio ou informe 0 para n\u00e3o fazer a compara\u00e7\u00e3o<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalcular\" id=\"calculate-button\" data-post=\"2113\">Calcular<\/button><button type=\"reset\">Redefinir<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calcular automaticamente<\/label><small>Se ativado, o resultado \u00e9 atualizado automaticamente quando voc\u00ea altera qualquer valor.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Verifica\u00e7\u00e3o da press\u00e3o de contato<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Press\u00e3o m\u00e9dia de contato no solo<\/span><span class=\"result-term\">q<\/span><\/span><span class=\"field-value\" id=\"result-1\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Compara\u00e7\u00e3o com a tens\u00e3o admiss\u00edvel<\/span><span class=\"result-term\">\u03b7<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-3\"><span class=\"field-title\"><span>F\u00f3rmula e observa\u00e7\u00f5es<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copiar link para este c\u00e1lculo<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Deixar um coment\u00e1rio<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"2113\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">O que voc\u00ea achou deste resultado?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Curti <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">\u00datil <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confuso <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Decepcionado <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Impreciso <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>Press\u00e3o de contato sob sapata<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">F\u00f3rmula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[ q = \\frac{P}{A} = \\frac{P}{L \\times B} \\]<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Onde:<\/strong><\/p>\n<ul>\n<li>\\(q\\) \u2014 press\u00e3o m\u00e9dia de contato do solo sob a sapata (kPa, ksf, psi)<\/li>\n<li>\\(P\\) \u2014 carga vertical total na base da sapata, incluindo peso pr\u00f3prio e sobrecarga (kN, kip, lb)<\/li>\n<li>\\(L\\) \u2014 comprimento da sapata, a maior dimens\u00e3o em planta (m, ft)<\/li>\n<li>\\(B\\) \u2014 largura da sapata, a menor dimens\u00e3o em planta (m, ft)<\/li>\n<li>\\(A = L \\times B\\) \u2014 \u00e1rea de contato em planta entre a sapata e o solo<\/li>\n<\/ul>\n<p>A f\u00f3rmula divide a carga vertical total pela \u00e1rea em planta da sapata, resultando na press\u00e3o uniforme que a sapata transmite ao solo. Ela pressup\u00f5e que a carga passa pelo centro de gravidade, de modo que a press\u00e3o se distribui de forma uniforme.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-2\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Press\u00e3o de contato sob sapata \u2013 Exemplo de c\u00e1lculo<\/h2><\/div>\r\n\r\n<p>{example}<\/p>\n<p><strong>Exemplo:<\/strong> uma sapata de 2,4 m \u00d7 1,8 m recebe em sua base uma carga vertical total de 300 kN. A press\u00e3o admiss\u00edvel do solo \u00e9 de 150 kPa.<\/p>\n<p>\\[ A = L \\times B = 2.4 \\times 1.8 = 4.32\\ \\text{m}^2 \\]<\/p>\n<p>\\[ q = \\frac{P}{A} = \\frac{300}{4.32} = 69.44\\ \\text{kPa} \\]<\/p>\n<p>\\[ \\eta = \\frac{q}{q_a} = \\frac{69.44}{150} = 0.463 = 46.3\\% \\]<\/p>\n<p><strong>Resultado:<\/strong> a press\u00e3o m\u00e9dia de contato \u00e9 de 69,44 kPa (\u2248 1,45 ksf), apenas 46,3% do valor admiss\u00edvel de 150 kPa \u2014 a verifica\u00e7\u00e3o \u00e9 aprovada com uma margem de seguran\u00e7a de aproximadamente 2,16\u00d7.<\/p>\n<p>{\/example}<\/p>\n\r\n<\/section>\n<h2>Como usar a calculadora<\/h2>\n<ol>\n<li>Informe a <strong>carga vertical (P)<\/strong> \u2014 a carga total de servi\u00e7o na base da sapata, incluindo o peso pr\u00f3prio da sapata e qualquer sobrecarga de solo \u2014 e escolha sua unidade (kN, kip ou lb).<\/li>\n<li>Informe o <strong>comprimento da sapata (L)<\/strong>, a maior dimens\u00e3o em planta, e escolha a unidade (m, cm, ft ou in).<\/li>\n<li>Informe a <strong>largura da sapata (B)<\/strong>, a menor dimens\u00e3o em planta, com as mesmas op\u00e7\u00f5es de unidade.<\/li>\n<li>Se quiser, informe a <strong>press\u00e3o admiss\u00edvel (q\u2090)<\/strong> em kPa, ksf, psi ou MPa. Deixe o campo vazio ou digite 0 se voc\u00ea precisa apenas do valor da press\u00e3o, sem compara\u00e7\u00e3o.<\/li>\n<li>Leia os resultados: a <strong>press\u00e3o m\u00e9dia de contato do solo<\/strong> (exibida na unidade escolhida, mais uma unidade secund\u00e1ria convertida) e, caso um valor admiss\u00edvel tenha sido informado, a <strong>compara\u00e7\u00e3o com a press\u00e3o admiss\u00edvel<\/strong>, com o percentual de utiliza\u00e7\u00e3o e o veredito APROVADO \/ EXCEDIDO.<\/li>\n<\/ol>\n<h2>O que \u00e9 press\u00e3o de contato e por que ela importa<\/h2>\n<p>Press\u00e3o de contato \u00e9 a press\u00e3o que a base de uma sapata exerce sobre o solo abaixo dela. Toda funda\u00e7\u00e3o, de uma pequena sapata isolada sob um pilar a uma longa sapata cont\u00ednua sob uma parede, funciona, em \u00faltima an\u00e1lise, espalhando a carga estrutural por uma \u00e1rea de solo suficiente para que o terreno a suporte sem recalques excessivos ou ruptura por cisalhamento. A press\u00e3o m\u00e9dia de contato \u2014 a carga total dividida pela \u00e1rea de contato \u2014 \u00e9 o primeiro e mais fundamental n\u00famero que o projetista verifica.<\/p>\n<p>A verifica\u00e7\u00e3o em si \u00e9 simples: a press\u00e3o m\u00e9dia n\u00e3o pode ultrapassar a press\u00e3o admiss\u00edvel do solo, um valor determinado a partir da investiga\u00e7\u00e3o geot\u00e9cnica, das normas de constru\u00e7\u00e3o ou de valores presumidos conservadores para tipos comuns de solo. Os valores admiss\u00edveis t\u00edpicos variam de cerca de 50\u201375 kPa para argilas moles e areias fofas at\u00e9 300 kPa ou mais para cascalho compactado, areia densa ou rocha alterada. Se a press\u00e3o calculada excede o valor admiss\u00edvel, \u00e9 preciso aumentar a sapata, reduzir a carga ou melhorar o solo (por exemplo, por compacta\u00e7\u00e3o ou substitui\u00e7\u00e3o).<\/p>\n<p>Interpretar o \u00edndice de utiliza\u00e7\u00e3o \u00e9 igualmente importante. Um resultado de 46%, como no exemplo acima, \u00e9 confort\u00e1vel, mas deixa margem para reduzir a sapata se a economia for relevante; um resultado acima de 100% reprova a verifica\u00e7\u00e3o sumariamente. Muitos projetistas tamb\u00e9m buscam ficar bem abaixo do valor admiss\u00edvel para limitar os recalques de longo prazo, j\u00e1 que o recalque costuma governar o projeto bem antes de uma ruptura por capacidade de carga.<\/p>\n<h2>Hip\u00f3teses, limita\u00e7\u00f5es e dicas pr\u00e1ticas<\/h2>\n<ul>\n<li><strong>Somente carga conc\u00eantrica.<\/strong> A calculadora admite que a resultante das cargas passa pelo centro de gravidade da sapata, gerando press\u00e3o uniforme. Para uma carga exc\u00eantrica, com excentricidade \\(e\\) medida a partir do centro, a press\u00e3o m\u00e1xima na borda passa a ser \\(q_{max} = \\frac{P}{A}(1 + \\frac{6e}{B})\\) e tamb\u00e9m deve ficar abaixo do valor admiss\u00edvel. Verifique se \\(q_{min} = \\frac{P}{A}(1 - \\frac{6e}{B}) \\geq 0\\); caso contr\u00e1rio, parte da sapata descola do solo.<\/li>\n<li><strong>Press\u00e3o bruta versus l\u00edquida.<\/strong> Verifique se a carga P inclui o peso pr\u00f3prio da sapata e o peso do solo acima dela. Uma verifica\u00e7\u00e3o com press\u00e3o bruta inclui esses pesos; uma verifica\u00e7\u00e3o com press\u00e3o l\u00edquida exclui o peso do solo que j\u00e1 existia antes da escava\u00e7\u00e3o. Certifique-se de que P e o valor admiss\u00edvel s\u00e3o coerentes \u2014 ambos brutos ou ambos l\u00edquidos.<\/li>\n<li><strong>Cargas de servi\u00e7o, n\u00e3o majoradas.<\/strong> As verifica\u00e7\u00f5es de press\u00e3o de contato normalmente s\u00e3o feitas com cargas de servi\u00e7o (n\u00e3o majoradas) contra uma press\u00e3o admiss\u00edvel. Cargas majoradas pertencem \u00e0s verifica\u00e7\u00f5es de resist\u00eancia estrutural do concreto, n\u00e3o \u00e0 verifica\u00e7\u00e3o do solo.<\/li>\n<li><strong>Confirme o valor admiss\u00edvel.<\/strong> As press\u00f5es admiss\u00edveis prescritivas das normas s\u00e3o pontos de partida conservadores; em projetos reais, use os valores de um relat\u00f3rio geot\u00e9cnico que reflita as condi\u00e7\u00f5es reais do solo, o n\u00edvel do len\u00e7ol fre\u00e1tico e os crit\u00e9rios de recalque.<\/li>\n<li><strong>Cargas horizontais e momentos n\u00e3o s\u00e3o considerados.<\/strong> Esta ferramenta verifica apenas o equil\u00edbrio vertical. Arrancamento por vento, momentos de tombamento e resist\u00eancia ao deslizamento exigem verifica\u00e7\u00f5es separadas.<\/li>\n<\/ul>\n<p>Depois que as dimens\u00f5es da sapata passam na verifica\u00e7\u00e3o de contato, come\u00e7a o dimensionamento estrutural: defini\u00e7\u00e3o da se\u00e7\u00e3o de concreto para flex\u00e3o e pun\u00e7\u00e3o (corte por puncionamento) e determina\u00e7\u00e3o da armadura. Para estimar quanto a\u00e7o a sapata precisa, experimente a calculadora de <a href=\"https:\/\/wpcalc.com\/en\/engineering\/rebar-weight\/\">Peso de armadura<\/a>; para verificar as tens\u00f5es de flex\u00e3o na pr\u00f3pria se\u00e7\u00e3o de concreto, a calculadora de <a href=\"https:\/\/wpcalc.com\/pt\/engenharia\/modulo-de-resistencia-da-secao-2\/\">M\u00f3dulo de resist\u00eancia da se\u00e7\u00e3o<\/a> \u00e9 uma boa companheira. J\u00e1 os efeitos das cargas na estrutura acima podem ser verificados com a calculadora de <a href=\"https:\/\/wpcalc.com\/en\/engineering\/simply-supported-beam-with-uniform-load\/\">Viga biapoiada com carga uniformemente distribu\u00edda<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Informe a carga vertical e as dimens\u00f5es em planta da sapata para calcular a press\u00e3o m\u00e9dia de contato do solo sob ela e compar\u00e1-la com a press\u00e3o admiss\u00edvel, verificando se o dimensionamento est\u00e1 aprovado.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[29],"class_list":["post-2113","post","type-post","status-publish","format-standard","hentry","category-engenharia","tag-engenharia-civil"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2113","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/comments?post=2113"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2113\/revisions"}],"predecessor-version":[{"id":2573,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2113\/revisions\/2573"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/media?parent=2113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/categories?post=2113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/tags?post=2113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}