Seismic Resistance Verification of Confined Masonry Using Shock Table Studies

Abstract

The Seismic Resistance Verification Of Confined Masonry Using Shock Table Studies paper presents Peru’s historic evolution of confined masonry, including the development of the Code, and the seismic design considerations of confined masonry buildings. This is the only Peruvian design and construction code that covers aspects of seismic design based on performance.

Much of India is prone to substantial earthquakes, and past earthquakes have unmasked the vulnerability associated with both unreinforced masonry (URM) and improperly built reinforced concrete (RC) frame construction. URM structures present a severe hazard in regions prone to earthquake.

As well as non-engineered RC structures can have devastating consequences. Housing for families in the economically weaker sector and lower income group is really challenging for such events. Regardless of residing in a city or village, everyone wants a house with masonry walls and RC roof, just like the buildings in larger urban areas.

The response of confined masonry buildings with autoclaved aerated concrete to seismic ground motion has been studied. This paper aims to investigate the seismic fragility of confined masonry (CM) structures in Lima, Peru, which can be used in urban scale earthquake scenarios.

These non-solid bricks include both hollow bricks with more than 30% of the bed area holes and horizontally-hollow bricks (bricks with large horizontal holes) designed for use in non-structural walls. Masonry walls ‘ seismic behavior with such bricks is very poor and the seismic resistance is relatively low.

Conclusion

Since 1970, the masonry code in Peru has been revised and updated, with different versions issued in 1977, 1982, and 2006. Many years of experimental studies on masonry specimens built using local materials and numerous analytical studies form the basis for the current Code issued in 2006.

Masonry code is Peru’s only code with a performance-based design for masonry structures subject to moderate and severe earthquakes. Hence, low-quality materials and poor workmanship are common, making many masonry constructions vulnerable to the effects of moderate and severe earthquakes.