Strengthening your bones is dependant upon two things. When you lift weights, yes you put stress on your bones. Just like a muscle, your bones will adapt to the increase in strength and become stronger, but instead of protein (which is also good for bones) you need a steady mineral profile in your diet. Not just calcium, but the electrolytes, and other minerals. So yes, you can strengthen bones through weight training. A lot of older men and women are getting into this hait to prevent osteoperosis.
As far as tendons go. They dont grow so well to adapt to muscle size. Tendons hole muscle to bone so if your muscles are growing rapidly either from AAS, PHs or just a good spirt of growth, its likely you will have tendon trouble Stretching is a key to getting tendons loose so they can stretch and accomidate the muscle growth. A lot of PH and AAS users exeperience tendon ruptures, apophysitis, and tears or strains to their tendons from the rapid muscle growth. So be careful.