Each one must come to their own conviction based on their own study of Scripture. Here are some thoughts...Jesus said that Moses granted divorce because of the hardness of their hearts. A lot of times from the pulpit this is used to keep a woman in a destructive marriage. She has to forgive, etc or she is hard hearted. But what if we look at this with fresh eyes. Research shows that abuse follows a cycle of violence and remorse (notice I didn't say repentance). The violence increases and the remorse and "honeymoon" phases shrink. Each cycle serves to further harden his heart. A man who abuses his wife is demonstrating a hard heart, and God granted divorce for her protection as well as to possibly bring him to repentance. Also what about in Malachi where it says God hates divorce. It is not directed at women who are divorcing abusive men, but at men who are "dealing treacherously" with their wives.
One final thought. Although God hates divorce, He loves people. Jesus honored women in a culture that held a low opinion of them. He died for each woman who is now or ever has been in an abusive marriage. He said he came that we might have life and have it more abundantly. What in everything we know of the teaching of Scripture other than one understanding of one verse, says that Christ expects a woman to stay and be abused rather than get a divorce? The only verse in Scripture that can be interpreted to exclude abuse as "Biblical grounds" is Matthew 5 and there are different views of what that means. Was he talking about legal divorce? Some commentators say that He was commenting on the practice of "putting away" without the writ of divorce. In any case, I think sometimes marriage is made into an idol.
