Seismic Performance of Traditional Bamboo-Stilted House of Flood Plains in Assam

This work studies the performance of a typical single storey, environmentally sustainable bamboo-stilted house located in the flood plain of Assam. Field study is done at the Nimatighat area of Jorhat, Assam, India, for collection of the building configuration and details of, material, structural, and foundation of a typical bamboo-stilted house. Modeling is done in SAP 2000®. The model has the most accurate representation of the structure including spring elements to account for soil-structure interaction. Based on the modal analysis results the best suitable model is finalized. The bamboo species found in the site is Bambusa balcooa (Botanical name). The physical and mechanical properties are as per IS 15912:2012. The geometrical properties of the bamboo elements are based on field study. Spring stiffness for footing is obtained using formulations from established literature as appropriate for the soil-type found in the site. The seismic performance of the finalized model is evaluated using the response spectrum method of IS 1893(Part 1):2016.