A B737-700 pilot on a Quiet Bridge Visual to SFO Runway 28R encountered some turbulence from a heavy jet early in the approach. Later a conflict developed between an Airbus on the parallel final to 28L causing the reporter to take evasive action.

Narrative

Day VFR on Quiet Bridge Visual Approach to 28R at SFO. Autopilot on; LNAV/VNAV with APPROACH armed. Cleared for the visual approach; following behind heavy (received some wake turbulence and roll earlier on the approach); and told to watch for an Airbus on parallel approach to 28L. We saw him and acknowledged. Given speed of 160; approaching the turn point at the bridge; approximately 2300 FT; began slowing and configuring. Lost visual on Airbus as focused on approach (he was behind and to the left of me); heard 'Traffic'; looked over and saw Airbus converging on our course; believed he had overshot or was lined up on wrong runway. Clicked off autopilot and banked right; then heard RA 'Descend; now'; initiated descent below glideslope until he turned back; then was able to level out and recapture glideslope and configure and land normally (still above 1500 or so when leveled off). Upon landing informed Tower of RA; no response. Asked ground control for Towers' phone number; told to ask our Operations for that. Asked Operations and given phone number; spoke with Supervisor at the Tower who told me 'he received numerous calls about this type of incident all the time; they plan the approaches to be shoulder to shoulder'. I told him staggered spacing might be a better idea. I think this charted visual approach needs to be changed so that we don't converge at the same point over the bridge; or Approach and Tower should stagger us instead of putting us in shoulder to shoulder. The Tower Supervisor told me they did 'shoulder to shoulder' by design; seems dangerous to me.