Which structural failure mode most threatens masonry arch bridges during seismic activity?

💡 Explanation

During seismic activity, tensile stress waves propagate through the arch because of ground motion, causing separation at mortar joints and potential collapse. Therefore separation results, rather than spalling, buckling, or erosion which are caused by environmental factors unrelated to rapid seismic events.

• Which optical consequence was demonstrated when medieval Islamic astronomers performed the "pinhole camera" experiment?
• Which constraint limited the scale when constructing ziggurats with mud bricks reinforced by bronze anchors?
• Which risk increased when 18th-century naval ships exceeded design displacement during transatlantic voyages?
• Which outcome occurs when early blast furnaces exceeded practical height limits?
• Which effect allowed Roman torsion siege weapons to achieve projectile ranges beyond contemporary trebuchets?
• Which outcome occurred when 18th-century navigators relied solely on dead reckoning during prolonged bad weather?