Like black bamboo, that one is quite a bender. Sounds like it needs to be moved to another spot. As with other bamboos (and many other broad-leaved evergreens) a location out of wind also produces a happier plant.

abnormalsanon In the future try not to shake the snow and ice off the plants, believe it or not the snow and ice is protecting them. When you shake them leaves and branches will break off forever damaging the plants. This happens to my yellow groove every year, and every year when the snow and ice melts it stands straight back up with little to no damage. Trust me this species is very hardy -15 degrees f. The snow and ice actually protects the leaves from desication from cold winter winds. I've been growing it and many others for about 10 years. Thanks Jeff

The problem was it was blocking the sidewalk.

Although I haven't tested it, I'd really be worried about the fishing line cutting into the culms, especially if the culms are less than a year old. If you had nothing else to use, I would put something between the culms and the line... maybe a cloth or cardboard.

Then again, it may not be a problem. Will you let us know how it worked and if there was any damage?

I have at least 50% of my bamboo curtain broken in the middle from the blizzard. I am sick about it. I had it all along my back yard. What to do? I will need to get help to clean it up...can I make a clean cut below the break and hope it will continue to grow?

The broken/cut canes won't get any taller, but you should have plenty of new shoots that will be tall enough to hide the pruned culms. If it were me I'd cut them as you said (clean cut below the break) remembering that the internode that is cut will die back to the node (joint) below it. Then I'd wait until the new shoots harden and leaf out, then see how it looks. If the older cut culms look weird, I'd probably remove some of them.

An update: the bamboo survived 3 blizzards with barely a scratch! It was totally exposed to the wind/snow, and the only difference is that there's some leaf burn on top. I gave up on the fishing line after a few hours--I was too worried it would damage the culms, even with something soft placed in between.

However, the winter weather made me realize that these plants are just too big and tall for the space. I plan to move them to large raised planters in the backyard and will plant something more appropriate (a shorter, clumping variety probably) in this space. Any ideas? Whatever I plant there will get full sun and wind.

Did the fishing line cut into the culms at all?