Eastern Virginia Bankshares Inc. of Tappahannock and Glen Allen-based First Capital Bancorp Inc. said yesterday that they plan to merge. The combined company would create the second-largest community bank, by total assets, based in the Richmond area and one of the 10 largest in Virginia. It was the second Virginia bank combination announced this week. On Monday, First Market Bank in Richmond and Union Bankshares Corp. in Bowling Green announced a merger to create the state’s largest community bank.