You should check out Bourbon Neat: http://neat.bourbon.io/, or leverage Sass' @extend directive.

Your CSS could easily be shortened to:

  .body {
    @extend .container;
  }

  .nav-header {
    @extend .row;
  }

  .my-logo {
    @extend .col-sm-2;
  }

And your markup could be much cleaner:

  <body>
    <nav class="nav-header">
      <div class="my-logo">
        <!-- your stuff -->
      </div>
    </nav>
  </body>