Basic Study for Bridge Between Engineering and Construction Practice of Non-Engineered Houses

Abstract eng:
Non-engineered houses are constructed with no or little technical intervention and need more to be safer against earthquakes. There are several guidelines, recommendations, manuals or others on seismic designs for non-engineered houses in several countries, which are claimed to be feasible and acceptable for local construction workers. However we still find big gap between engineering and construction practice in construction sites. Some of the causes of the gap are that local workers do not understand or ignore the technical issues. But we also found some of them are caused by the designs, which require construction works which could not implemented with simple and cheap tool on site, detailing which are too complicated, or materials which are not available in local markets. In order to improve seismic safety of non-engineered houses, we need a bridge over this gap. This is a basic study to construct a bridge between engineering and construction practice of non-engineered houses. We implemented monitoring of construction procedures of confined masonry houses with brick walls in Lima in Peru and Yogyakarta in Indonesia to grasp actual situation of construction works and profile of workers for the basic information/data. Based on them we elaborate recommendations through discussion with researchers of each country and neighboring countries. We conclude we should identify most critical issues among various kinds of aspects for safer structures because smaller number of issues is the very basic condition for non skilled or semi skilled local workers to understand and accept. We tentatively propose that bending works of rebar of reinforced columns and beams and anchorage of brick walls to RC members are most critical issues for safer confined masonry houses and also present several alternatives of designs and detailing.

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