protecting bamboo from the wind

A few months ago I bought a bamboo and its doing really well but I am worried about the wind whipping it and breaking the stems as its only youngish they are not very fat yet.

The bamboo is in a container and it has a house wall to one side and a fence on the other with a shed a couple of metres away on a third side. It was quite windy yesterday and i noticed that some of the stems were been blown about almost to floor level. In desperation last night i very loosely put a circle of twine around it to stop it blowing so much . I am now wondering if by doing this I have in fact raised the odds for it getting broken? any advice would be handy in this. Thanks