I don't think he expected to die.
I wholeheartedly disagree. As I mentioned upthread, he knew (along with the entire audience) what it meant to step out onto that platform with Ben. He did it anyway, even though he knew the odds were small. He did it because the odds, small though they were, almost always ended up working in his favor and because this was a gamble worth making. Sure, there was a part of him that thought he might be able to talk his way out of this one - but the hesitation he made before shouting Ben's name, before stepping onto the bridge, shows he clearly knew what he was getting into. He knew this could be his last act.
And that's what makes the moment so powerful.
He still confronted his son.